DVC DVC-1412 User manual

TECHNICAL MANUAL FOR
DVC-1412 CAMERAS
Manual Number: 86-1412-04
Release Date: January 1, 2003
DVC Company
10200 Highway 290 West
Austin, Texas 78736
Phone: [phone]
Fax: [phone]
E-Mail: [email protected]m
WWW: http://www.dvcco.com

TABLE OF CONTENTS
1INTRODUCTION ...............................................................................................................................................1
2INITIAL INSPECTION......................................................................................................................................2
2.1 UNPACKING AND RECEIVING................................................................................................................2
2.2 EQUIPMENT SUPPLIED (LVDS SYSTEM) .................................................................................................3
2.3 EQUIPMENT SUPPLIED (FIREWIRE SYSTEM) ...........................................................................................4
2.4 EQUIPMENT SUPPLIED (CAMERALINK SYSTEM) .....................................................................................5
2.5 OPTIONAL ITEMS ......................................................................................................................................6
2.6 CAMERA POWER SUPPLY .......................................................................................................................6
2.6.1 INTERNATIONAL APPLICATIONS .....................................................................................................6
3MAINTENANCE.................................................................................................................................................7
3.1 LENS AND SENSOR FACEPLATE CLEANING.......................................................................................7
3.2 CLEANING AND LUBRICATION .............................................................................................................7
3.2.1 When should I clean the CCD imager in my camera?...........................................................................7
3.2.2 What causes the CCD imager to get dirty?............................................................................................7
3.2.3 What must I do before cleaning the CCD imager? ................................................................................7
3.2.4 How should the CCD Imager be cleaned?.............................................................................................7
4CAMERA SPECIFICATIONS ..........................................................................................................................9
4.1 OPTICAL ......................................................................................................................................................9
4.2 DIGITAL VIDEO OUTPUT.......................................................................................................................10
4.2.1 12 Bit RS-422/RS-644 (LVDS / FireWire) ...........................................................................................10
4.3 INTENSICAM - 1412 .................................................................................................................................11
4.4 CAMERA CONTROL ................................................................................................................................11
4.5 ELECTRICAL.............................................................................................................................................12
4.6 MECHANICAL FOR STANDARD LVDS/FIREWIRE/CAMERALINK CAMERAS ............................12
4.7 MECHANICAL FOR COOLED CAMERAS.............................................................................................12
4.8 MECHANICAL FOR INTENSICAM ........................................................................................................12
5CAMERA FUNCTIONAL DESCRIPTION...................................................................................................13
5.1 BLOCK DIAGRAM....................................................................................................................................13
5.2 CCD AND VIDEO BOARD .......................................................................................................................13
5.2.1 CCD Sensor .........................................................................................................................................13
5.2.2 Video Processing .................................................................................................................................14
5.2.3 Video Digitization................................................................................................................................14
5.2.4 Voltage Regulation ..............................................................................................................................15
5.2.5 Timing..................................................................................................................................................15
5.3 DIGITAL I/O BOARD................................................................................................................................15
5.3.1 LVDS Version: TTL to LVDS Drivers..................................................................................................15
5.3.2 Fire Wire Version ................................................................................................................................15
5.3.3 CameraLink Version............................................................................................................................15
6INSTALLATION...............................................................................................................................................16
7MODES OF OPERATION...............................................................................................................................16
7.1 NORMAL MODE .......................................................................................................................................16
7.2 HIGH SPEED SHUTTER ...........................................................................................................................17
7.2.1 Setting The Exposure Duration............................................................................................................17
7.2.2 Strobe...................................................................................................................................................17
7.2.3 Reset & Shutter ....................................................................................................................................18
ii

7.2.4 Reset Modes.........................................................................................................................................20
7.3 N FRAME INTEGRATION........................................................................................................................22
7.3.1 Reset Operation in N-Frame Integration Mode...................................................................................22
7.4 ULT: ULTRA-LONG-TERM EXPOSURE................................................................................................22
7.5 PULSE DRIVEN EXPOSURE ...................................................................................................................23
7.6 BINNING ....................................................................................................................................................24
7.6.1 Binning and Shutter:............................................................................................................................26
7.6.2 Binning and Bayer Pattern Color Filter Arrays ..................................................................................26
7.7 SUB-ARRAY / REGION OF INTEREST (ROI ) ..................................................................................................27
7.7.1 Functional Description ........................................................................................................................27
7.7.2 Advantages...........................................................................................................................................28
7.7.3 Disadvantages......................................................................................................................................28
7.7.4 What can be done to overcome this disadvantage? .............................................................................28
7.7.5 What applications should ROI be used for? ........................................................................................28
7.7.6 ROI Commands....................................................................................................................................28
7.8 SLOW SCAN ..............................................................................................................................................29
7.9 INTENSICAM-1412 ...................................................................................................................................30
7.9.1 Introduction .........................................................................................................................................30
7.9.2 Functional Description ........................................................................................................................30
7.9.3 Spectral Response................................................................................................................................31
7.9.4 Intensicam & CView  .........................................................................................................................32
7.10 MULTI-SPECTRAL OPTION....................................................................................................................33
7.10.1 Software issues.....................................................................................................................................33
7.10.2 Spectral Response................................................................................................................................35
7.10.3 Module Removal & Change of Filters .................................................................................................35
8APPLICATION NOTES...................................................................................................................................43
8.1 BAYER FILTER DECODING ALGORITHM...........................................................................................43
8.1.1 Introduction .........................................................................................................................................43
8.1.2 Color Pixel Processing ........................................................................................................................43
8.1.3 White Balance......................................................................................................................................43
8.1.4 Gamma Correction ..............................................................................................................................45
8.1.5 Color Coding .......................................................................................................................................45
8.1.6 Suggested Algorithm............................................................................................................................45
9SERIAL COMMAND INTERFACE DEFINITION FOR DVC-1412 CAMERAS (LVDS AND
CAMERALINK CAMERAS)...................................................................................................................................46
9.1 INTRODUCTION .......................................................................................................................................46
9.2 PHYSICAL DESCRIPTION.......................................................................................................................46
9.3 COMMUNICATION PROTOCOL.............................................................................................................46
9.4 CAMERA CONTROLS ..............................................................................................................................47
9.4.1 Gain .....................................................................................................................................................47
9.4.2 Offset (or black level) ..........................................................................................................................47
9.4.3 Exposure ..............................................................................................................................................48
9.4.4 Modes...................................................................................................................................................48
9.5 SPECIAL COMMANDS.............................................................................................................................50
9.5.1 Intensifier Control ...............................................................................................................................51
9.5.2 Notes on Intensifier Operation.............................................................................................................52
9.5.3 Notes on Wheel Commands .................................................................................................................53
9.6 COMMAND SUMMARY ..........................................................................................................................54
10 INFORMATION AND SUPPORT RESOURCES .........................................................................................55
11 APPENDIX.........................................................................................................................................................56
11.1 APPENDIX A: MECHANICAL DIMENSIONS DIAGRAM....................................................................56
11.2 APPENDIX B: CABLE DRAWINGS ........................................................................................................63
iii

11.3 APPENDIX C: DVC-1412 CAMERA CONNECTORS.............................................................................67
11.3.1 Auxiliary Connector.............................................................................................................................68
12 WARRANTY AND AFTER-SALES SERVICE.............................................................................................70
13 COPYRIGHT INFORMATION ......................................................................................................................71
iv

LIST OF FIGURES
Figure 2.2-1: DVC-1412 Camera and adjustment wrench ............................................................................................3
Figure 2.2-2: Linear regulated power supply.................................................................................................................3
Figure 2.2-3: PixeLYNX board .....................................................................................................................................3
Figure 2.2-4:US version of line cord with IEC320 receptacle.......................................................................................3
Figure 2.2-5: DVC distribution CD-ROM.....................................................................................................................3
Figure 2.2-6: 10ft. interface cable, with 18” RS232 pigtail...........................................................................................3
Figure 2.3-1: DVC-1412 Camera and adjustment wrench ............................................................................................4
Figure 2.3-2: Linear regulated power supply.................................................................................................................4
Figure 2.3-3: Firewire cable (actual color may vary) ....................................................................................................4
Figure 2.3-4:US version of line cord with IEC320 receptacle.......................................................................................4
Figure 2.33-2.3-5: DVC distribution CD-ROM ............................................................................................................4
Figure 2.4-1: DVC-1412 Camera and adjustment wrench ............................................................................................5
Figure 2.4-2: Linear regulated power supply.................................................................................................................5
Figure 2.4-3: CameraLink cable (actual color may vary).............................................................................................5
Figure 2.4-4:US version of line cord with IEC320 receptacle.......................................................................................5
Figure 2.4-5: DVC distribution CD-ROM.....................................................................................................................5
Figure 2.4-6: CameraLink board ...................................................................................................................................5
Figure 2.6-1: Bottom view of power supply showing voltage selection switch (115V)................................................6
Figure 2.6-2: Bottom view of power supply showing voltage selection switch (220V)................................................6
Figure 2.6-3: IEC line cord with Euro-style plug ..........................................................................................................6
Figure 2.6-4: IEC line cord with UK-style plug ............................................................................................................6
Figure 4.1-1: Monochrome camera spectral response ...................................................................................................9
Figure 4.1-2: IR Filter Characteristics .........................................................................................................................10
Figure 4.3-1: Spectral curve for Intensicam ................................................................................................................11
Figure 5.1-1: DVC-1412 camera block diagram (LVDS version shown) ...................................................................13
Figure 5.2-1: Bayer pattern color filter array...............................................................................................................13
Figure 7.1-1: Timing diagram--normal mode..............................................................................................................16
Figure 7.2-1: Timing diagram--shutter mode (HNL & HDL) .....................................................................................17
Figure 7.2-2: Asynchronous Reset ..............................................................................................................................18
Figure 7.2-3: Timing diagram—HDO Mode...............................................................................................................20
Figure 7.2-4: HDL mode .............................................................................................................................................21
Figure 7.3-1: Timing diagram--long exposure.............................................................................................................22
Figure 7.5-1: Asynchronous Reset ..............................................................................................................................23
Figure 7.5-2: Pulse driven integration mode, showing long/short exposure with minimum latency...........................24
Figure 7.6-1: Bin 2x2 case...........................................................................................................................................25
Figure 7.9-1: Intensicam spectral response..................................................................................................................31
Figure 7.10-1: Cooled (left) and non-cooled (right) multi-spectral cameras. ..............................................................33
Figure 7.10-2: Color filter wheel module ....................................................................................................................34
Figure 8.1-1: Bayer Pattern CFA.................................................................................................................................43
Figure 9.5-1: Luminous Gain versus IGN Argument ..................................................................................................51
Figure 11.1-1: 1412 with LVDS connector .................................................................................................................56
Figure 11.1-2: 1412 with CameraLink connector........................................................................................................57
Figure 11.1-3: 1412 Camera with 1394 Connector .....................................................................................................58
Figure 11.1-4: 1412 TE Cooler Camera (LVDS model shown) ..................................................................................59
Figure 11.1-5: Intensicam-1412 Image Intensifier Camera (LVDS shown)................................................................60
Figure 11.1-6: 1412-Multispectral Wheel Non-Cooled Camera (LVDS shown) ........................................................61
Figure 11.1-7: 1412-Multispectral Wheel Cooled Camera (FireWire shown) ............................................................62
Figure 11.2-1: DVC-1412-to-pixeLNYX cable...........................................................................................................63
Figure 11.2-2: CameraLink cable................................................................................................................................64
Figure 11.2-3: DVC-1412-MV1500 cable...................................................................................................................65
Figure 11.2-4: DVC-1412-to-Matrox Meteor II DIG cable (LVDS)...........................................................................66
Figure 11.3-1: Camera rear view showing connector pin numbers (LVDS connections shown)................................67
v

LIST OF TABLES
Table 7.6-1: Binning commands..................................................................................................................................24
Table 7.7-1: Slow-scan mode commands....................................................................................................................29
Table 9.4-1: Gain Table...............................................................................................................................................47
Table 9.4-2: Offset Table.............................................................................................................................................47
Table 11.3-1: Camera connector information..............................................................................................................68
Table 11.3-2: Power supply connector pinout .............................................................................................................68
Table 11.3-3: Digital video connector pinout ..............................................................................................................69
vi

1 INTRODUCTION
DVC Company, based in Austin, Texas, is a manufacturer of cost-effective, high performance video
cameras. We thank you for purchasing from the DVC-1412 series of mega-pixel digital video cameras.
This series of cameras is based on the premise that precise image processing applications demand mega-
pixel cameras that are optimized for the performance available from today’s leading edge CCDs, while
maintaining an acceptable price to performance ratio.
The 2/3” interline Sony ICX285 CCD imager used in the DVC-1412 cameras has a 1392(H) X 1040(V)
progressively-scanned image format and has a pixel size of 6.45µm X 6.45µm. The CCD sensor has a
particularly high QE in the Blue-Green region of the spectrum resulting in higher sensitivity for most
applications.
The DVC-1412 series includes a non-cooled camera, a cooled camera, an intensifier version, and a multi-
spectral camera using a built-in filter wheel module in both cooled and uncooled versions. A choice of I/O
options is available: LVDS, CameraLink, or FireWire. High-speed shuttering, long-term integration, pulse
driven integration, and gain/offset control are standard features. The cooled camera features include
cooling to -20°C and removal of the sensor faceplate for UV applications. All DVC cameras come with a
standard 2-year warranty and use industry-standard “C-mount” lenses.
This camera series also includes Intensicam II, which utilizes a gated, Gen III image intensifier, fiber-
optically coupled to the CCD.
With the LVDS version, the 10 frames/sec video data is provided in a 12 bit parallel, differential LVDS
format, which is "plug-and-play" compatible with industry-standard image processors. The digital data,
pixel clock, enable line, and enable frame signals are accessible via the DB-44 connector.
The CameraLink version transmits 10 f/s, 12-bit data over an industry standard MDR-26 interface to any
CameraLink compatible frame grabber.
In the FireWire version of the camera, the LVDS output is replaced by an industry standard 1394A
connector. The camera provides 12-bit data at 10 frames/s when used with any OHCI compliant FireWire
interface card.
Computer-based control of gain offset is provided to "tune" the dynamic range of the camera to the
application. This provides an optimum match between the dynamic range and sensitivity of the camera and
the requirements of the application.
The CCD is physically mounted in the cavity of a high-precision opto-mechanical plate to eliminate the
stability problems that are caused by using poorly mounted CCDs in vibration applications. The highly
stable optical mount utilizes an adjustable C-mount coupling to provide critical system focusing
adjustments. In-camera digitization using the CCD pixel clock eliminates pixel jitter, improves
repeatability and brings sub-pixel accuracy to image processing applications.
CView, a Windows GUI software package is supplied with the camera, allowing image viewing and
control of all camera operations. Five user programmable, single-click software “buttons” allow the user
to customize the camera to the imaging application.
This manual applies to all models of the DVC-1412 cameras.
1

2 INITIAL INSPECTION
2.1 UNPACKING AND RECEIVING
These items were thoroughly tested and carefully packed in the factory. Upon acceptance by the
carrier, they assume responsibility for its safe arrival. Should you receive this item in a damaged
condition, apparent or concealed, a claim for damage must be made to the carrier. To return the
product to the factory for service, please contact the DVC Customer Service Department at (512)-
301-9564 for a Return Material Authorization (RMA) Number.
If visual inspection shows damage upon receipt of this shipment, it must be noted on the freight bill
or express receipt, and the notation signed by the carrier's agent. Failure to do this can result in the
carrier refusing to honor the claim.
When the damage is not apparent until the unit is unpacked, a claim for concealed damage must be
made. Make a mail or phone request to the carrier for inspection immediately upon discovery of
the concealed damage. Keep all cartons and packing materials. Since shipping damage is the
carrier's responsibility, the carrier will furnish you with an inspection report and the necessary
forms for filing the concealed-damage claim.
2

2.2 EQUIPMENT SUPPLIED (LVDS system)
Figure 2.2-1: DVC-1412 Camera and adjustment wrench Figure 2.2-2: Linear regulated power supply
Figure 2.2-3: PixeLYNX board Figure 2.2-4:US version of line cord with IEC320 receptacle
Figure 2.2-5: DVC distribution CD-ROM Figure 2.2-6: 10ft. interface cable, with 18” RS232 pigtail
3

2.3 EQUIPMENT SUPPLIED (FireWire system)
Figure 2.3-1: DVC-1412 Camera and adjustment wrench Figure 2.3-2: Linear regulated power supply
Figure 2.3-3: FireWire cable (actual color may vary)
Figure 2.3-4:US version of line cord with IEC320 receptacle
Figure 2.33-2.3-5: DVC distribution CD-ROM
4

2.4 EQUIPMENT SUPPLIED (CameraLink system)
Figure 2.4-1: DVC-1412 Camera and adjustment wrench Figure 2.4-2: Linear regulated power supply
Figure 2.4-3: CameraLink cable (actual color may vary) Figure 2.4-4:US version of line cord with IEC320 receptacle
Figure 2.4-5: DVC distribution CD-ROM
Figure 2.4-6: CameraLink board
5

2.5 OPTIONAL ITEMS
The following items are optional items and may be ordered from authorized dealers of DVC. They
are not typically supplied with each Camera.
1. Lenses and/or other optical elements
2. Third party Image Analysis software, e.g. ImagePro, Adobe Photoshop®, QED Imaging,
Improvision, etc.
2.6 CAMERA POWER SUPPLY
DVC provides a power supply for use with the DVC-1412 camera. The electrical and optical
specification of the camera are guaranteed only when used with DVC supplied accessories.
NOTE: The power supply is connected to line voltage. It is encapsulated for the safety of the
operator. There are no user-serviceable parts inside the power supply, and it should not be opened
since there are dangerously high voltages within.
2.6.1 INTERNATIONAL APPLICATIONS
Figure 2.6-1: Bottom view of power supply showing voltage
selection switch (115V)
Figure 2.6-2: Bottom view of power supply showing voltage
selection switch (220V)
Figure 2.6-3: IEC line cord with Euro-style plug
Figure 2.6-4: IEC line cord with UK-style plug
6

3 MAINTENANCE
CAUTION: Only technicians familiar with video circuits and digital camera maintenance should
attempt procedures in this section of the manual. This camera contains sensitive devices that can
be damaged by static discharge. Use appropriate static control methods when working inside the
Camera or at connector pins when cable plugs are removed.
There are no user serviceable parts inside the camera, and, in most cases there should not be any
need to open the camera.
3.1 LENS AND SENSOR FACEPLATE CLEANING
The glass faceplate of the CCD image sensor can be cleaned by wiping the surface gently with a
cotton swab soaked in isopropyl alcohol. Never rub with a dry swab. Please note that the sensor
faceplate is near the focal plane of the Camera. Any contaminants on this surface will show up in
the picture. Dry pressurized air can be helpful in removing these contaminants. The use of
“canned” compressed air is not recommended since small amounts of aerosol liquid found in some
products can create pooling and streaks on the surface.
3.2 CLEANING AND LUBRICATION
Carefully clean the exposed optical surfaces of the lens and the window filter in front of the
faceplate of the sensor periodically to remove accumulated dust and film only if the lens is
removed.
3.2.1 When should I clean the CCD imager in my camera?
Clean the CCD imager only when absolutely necessary, to avoid damaging the delicate CCD
surface. Although cleaning the CCD imager is fairly simple, you should not do so unless the dirt or
debris is a noticeable problem in the image. Any time the sensor and other delicate mechanisms are
exposed to tools, they are at risk of being damaged. Use all practical safety precautions, common
sense, and only the tested and approved cleaning supplies listed in this bulletin.
3.2.2 What causes the CCD imager to get dirty?
Dust and dirt are the culprits. At DVC, professional cameras are manufactured under strict
conditions and assembled in a dust-free room. Before shipping, each camera is tested and checked
to assure that it meets stringent specifications for cleanliness and quality. Although we take
extreme care to produce a dust-free camera, changing lenses, or static can cause debris to appear on
the imager.
3.2.3 What must I do before cleaning the CCD imager?
One of the first steps in the cleaning procedure is the removal of the IR filter from the camera. Use
the adjustment wrench to turn the 1” format C-mount lens adaptor counter-clockwise. Then
remove the lens adaptor, which will cause the attached lens to be removed, thereby exposing the IR
filter.
3.2.4 How should the CCD Imager be cleaned?
1. Moisten a lint-free cotton swab with clean isopropyl alcohol. The swab should be completely
moist, but not dripping. Important: Isopropyl alcohol is flammable and evaporates quickly. It
acts as a solvent and lubricant to remove contaminants from the surface. Be sure to have your
camera ready with the CCD exposed before you moisten the swab.
2. Remove a cleaner from the protective plastic sleeve. Do NOT allow the swab to come in
contact with any surface that might contain dust, dirt, or other contaminants.
7

3. Carefully draw the once across the surface of the CCD glass with light, consistent pressure.
Rotate the swab 180° and draw it across the CCD surface again.
If pooling or streaks occur, you may have too much alcohol on the swab.
4. Examine the CCD surface in a strong light. Take an out-of-focus picture of a flat, illuminated
surface to see if any dirt or dust remains. If dust or dirt particles are present, they appear as a
soft shadow or dark blemish in the image.
5. If dust spots remain, repeat this procedure using a clean moistened swab.
8

4 CAMERA SPECIFICATIONS
4.1 OPTICAL
Sensitivity @ 2850°K
(measured with IR filter)
Color: 0.018fc for full-scale (min. gain); 0.001fc
for full-scale (max. gain); 0.0004fc for full-scale
with 10-sec exposure
Monochrome: 0.02fc for full-scale (min. gain);
0.001fc for full-scale (max. gain); 0.0003fc for
full-scale with 10-sec exposure
Pixel size and format 6.45µm(H)X 6.45µm(V); interline format
Spectral Response See Figures 4.1-1, 4.1-2, 4.1-3
Figure 4.1-1: Monochrome camera spectral response
9

0
10
20
30
40
50
60
70
80
90
100
350 400 450 500 550 600 650 700 750 800 850 900 950
Wavelength (nm)
% Transmission
Figure 4.1-2: IR Filter Characteristics
4.2 DIGITAL VIDEO OUTPUT
4.2.1 12 Bit RS-422/RS-644 (LVDS / FireWire)
Readout Rate 18 MHz, 9 MHz, 4.5 MHz, 2.25 MHz
(user selectable via software)
Resolution/Frame Rate
(Binning: Monochrome model only)
1392 x 1040 at 10.2 f/s (1 x 1)
1392 x 520 at 20 f/s (1 x 2)
696 x 520 at 20 f/s (2 x 2)
348 x 260 at 39 f/s (4 x 4)
174 x 130 at 68 f/s (8 x8)
Signal to noise >65 dB, at min. gain
Gamma 1.0 (linear)
10

4.3 INTENSICAM - 1412
(The data shown below represents the “standard” photocathode response. Extended blue
and special Gen IV versions are also available).
QE > 35% Quantum Efficiency from 500 to 800 nm
Sensitivity 1X10-8 fc Sensitivity (faceplate) @ 2854K, 10fps
Photocathode GaAs photocathode, std spectral response 450 to
900 nm
Intensifier life > 10,000 hrs @ 10-5 fc or lower
Geometric Distortion < 1%
Resolution 64 1p/mm
Gating 50 ns to 98 ms
Figure 4.3-1: Spectral curve for Intensicam
4.4 CAMERA CONTROL
RS-232C, C-ViewInterface Software module, standard
Gain control 30 dB
Offset control (black) -16% to +34%
High speed shutter LVDS: 93 µs to 98 ms
Integration control 98 ms to 15 min
11

4.5 ELECTRICAL
Timing Progressive scanned, non-interlaced
Power Supply Voltages &
Current requirements
±15 V DC each @ 250 mA steady state
+ 5 V DC @ 250 mA steady state.
Clock Rate 18 Mhz derived from internal crystal oscillator
4.6 MECHANICAL FOR STANDARD
LVDS/FIREWIRE/CAMERALINK CAMERAS
Weight (without lens) 12 ozs. (340 grams)
Temperature limits (operating) -10°C to 50°C
Temperature limits (storage) -30°C to 70°C
Dimensions 3.25” (H) X 3.25” (W) X 1.73” (L)
Lens mount Industry standard C- mount
Camera mount 2 X ¼ - 20 threaded holes for top/bottom mount
Digital Video Connector
LVDS:DB-44, female connector (See Appendix C)
FireWire: Standard 1394A connector
CameraLink: Standard 26-pim connector
Power Supply Connector LVDS: DB-9, Male connector (see Appendix C)
Firewire: Standard 1394A connector
4.7 MECHANICAL FOR COOLED CAMERAS
Weight (without lens) 27.9 ounces (792 grams)
Temperature limits (operating) -10°C to 50°C
Temperature limits (storage) -30°C to 70°C
Dimensions 3.90" (H) X 3.90" (W) X 2.80" (L)
Lens mount Industry Standard C-Mount
Camera mount 4 X ¼ - 20 threaded holes for top/bottom mount
Digital Video Connector
LVDS:DB-44, female connector (See Appendix C)
Firewire: Standard 1394A connector
CameraLink: Standard 26-pim connector
Power Supply Connector LVDS: DB-9, Male connector (see Appendix C)
Firewire: Standard 1394A connector
4.8 MECHANICAL FOR INTENSICAM
Weight (without lens) 22.0 ounces (624 grams)
Temperature limits (operating) -10°C to 50°C
Temperature limits (storage) -30°C to 70°C
Dimensions 3.25” (H) X 3.25” (W) X 3.20” (L)
Lens mount Industry Standard C-Mount
Camera mount 2 X ¼ - 20 threaded holes for top/bottom mount
Digital Video Connector DB-44, female connector (See Appendix C)
Power Supply Connector DB-9, Male connector (see Appendix C)
NOTE: See Appendix A for dimensioned mechanical diagrams.
12

5 CAMERA FUNCTIONAL DESCRIPTION
5.1 BLOCK DIAGRAM
S/H CCD
Video
CCD Sensor
CDS
(Correlated
Double
Sampling)
Video amplifier:
Gain control
Offset control
Clamping
A/D reference
generation
A/D Converter
Analog/Digital
conversion
TTL to LVDS drivers:
single ended TTL to parallel,
differential LVDS output
Imaging
Area
(1300 x 1030)
Timing logic:
Clock generation
Generation of all CCD control signals
Generation of all handshaking signals
Exposure control
CCD and Video Board
Processed CCD Video
CCD
Video
Horizontal
Vertical
S/H signals Timing signals
DB9-M Connector
(Pwr Supply)
+15V,-15V,+5V
DB-44 F
connector
(Digital
Video)
Horiz.
Driver
Vertical
Drivers
I/O board
Microprocessor:
RS232 interface
Mode logic
Gain/offset control
Gain
DAC
Offset
DAC
Mode/Exposure control
Gain control
voltage (0 to 3V)
Offset control
voltage (0 to 3V)
Crystal
Handshaking signals
RS232
signals
A/D
references
Camera
Figure 5.1-1: DVC-1412 camera block diagram (LVDS version shown)
5.2 CCD AND VIDEO BOARD
5.2.1 CCD Sensor
Light from the scene is brought into focus at the imaging plane of the CCD. A 1mm thick infrared
blocking optical removable filter blocks out the IR component of the light. The IR blocking filter is
attached to the c-mount adapter ring. For non IR multi-spectral imaging applications with the
DVC-1412 AC Mount Adapter without an IR filter is available.
The following functions take place within the CCD:
5.2.1.1 Integration
During the integration period (1/10 sec.), charges are integrated in the active charge site wells. The
amount of charge that is integrated in each active charge site well is proportional to the
illumination received at each active charge site on the CCD. In the case of the color camera, each
charge site has a Red, Green or Blue color filter over the field, designating it as a Red, Green or
Blue pixel. The filter pattern that is used is referred to as a Bayer pattern, which is shown below:
GBGB ..
RGRG..
GBGB ..
RGRG..
::::::
Figure 5.2-1: Bayer pattern color filter array
13

5.2.1.2 Charge Transfer
During the Vertical blanking interval, the charge that was integrated in each active charge site
during the previous exposure (normally 1/10 sec, or one frame) is shifted to an adjacent opaque
storage charge site. In the figure below, active charge sites are designated by the letter “I” for
integration and the opaque storage charge sites are designated by the letter “S” for storage.
SISIS I S I S
SISIS I S I S
SISIS I S I S
SISIS I S I S
SISIS I S I S
SISIS I S I S
S I
Charge transfer
(once per frame)
SISIS I S I S
SISIS I S I S
SISIS I S I S
SISIS I S I S
SISIS I S I S
SISIS I S I S
H-line transfer
Charge detection node
Horizontal shift register
1392 columns
1040 rows
Figure 5.2-2: Block diagram of CCD
5.2.1.3 Readout
In the following adjacent frame, the charges are transferred vertically, one line at a time, from the
storage charge sites of the CCD to an on-chip horizontal shift register and then sequentially to the
detection node where they are made available as signal voltages. NOTE: While one frame is being
read out from the opaque pixels, the next frame is being integrated in the active charge sites of the
CCD.
5.2.2 Video Processing
The low-level video signal voltage from the CCD is clamped (for black reference) and fed through
a high-speed CDS correlated double sampling CDS amplifier. The CDS process is required to
remove a significant source of noise from the video signal. The video signal is then amplified in the
next stage, which has voltage-controlled-gain and voltage-controlled-offset. The control voltages
for gain and offset are 0 to 3V in range and are derived via on-board digital-to-analog converters
(DACs) which are controlled via the host PC interface.
5.2.3 Video Digitization
The video signal output from the video processor is fed to a 12-bit Analog-to-Digital converter.
The 12 bit digital data is available at a connector on the board.
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