XIIMUS 1024CTI User manual

XIIMUS R-GB-IR CL User Manual. Version 1.2
X I I M U S
MODELS: 512CTi, 1024CTi & 2048CTi
USER MANUAL
ver 1.2
18 October 2006
TVI Vision Oy reserves the right to change any information in this document without prior notice. TVI
Vision Oy will not take any responsibility for any damage caused by possible inaccuracies or faults in the
equipment. This document may not be copied without the written consent of the TVI Vision Oy. An un-
authorised use or distribution of this document to a third party is prohibited. 18.10.2006

XIIMUS R-GB-IR CL User Manual. Version 1.2
DOCUMENT HISTORY
Version Date Author Description
0.1 2 Jun 2005 nr Modified from the respective RGB User Manual
0.2 29 Mar 2006 jjl Updates until App. B.
1.0 2 June 2006 nr & jjl First release
1.1 9 June 2006 nr Appendix C: Serial communications
Firmware updates:
D11ÆD13 and D12 ÆD14
Read-out of temperature status
Time-out at RS-232 port
1.2 18 Oct 2006 jjl Appendix: Cooling Option.
Minor changes in wording.
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XIIMUS R-GB-IR CL User Manual. Version 1.2
DECLARATION OF CONFORMITY
AS DEFINED BY THE COUNCIL DIRECTIVE
89 / 336 / EEC
EMC (ELECTROMAGNETIC COMPATIBILITY)
WE HEREWITH DECLARE THAT THIS PRODUCT
COMPLIES WITH THE FOLLOWING PROVISIONS APPLYING TO IT.
Emission CISPR 22 (1997)
Immunity IEC 61000-6-2 (1999)
APPLICABLE PATENTS:
FI 97264
US 6,476,870
EP 0 788 709
CA 2,203,835
JP 3626998
© TVI Vision, 18 October 2006 page 3 ( 57 )

XIIMUS R-GB-IR CL User Manual. Version 1.2
TABLE OF CONTENTS
1. INTRODUCTION............................................................................................................5
2. PRECAUTIONS .............................................................................................................6
3. CAMERA OVERVIEW ...................................................................................................8
3.1 COLOUR SEPARATION ................................................................................................... 8
3.2 CAMERA OPERATION..................................................................................................... 8
4. PROCESSING OF CCD OUTPUT...............................................................................11
4.1 ANALOGUE VIDEO PATH ............................................................................................... 11
4.2 PIXEL CORRECTION UNIT.............................................................................................. 12
4.2.1 Description.........................................................................................................12
4.2.2 Data order..........................................................................................................12
4.2.3 Correction algorithm..........................................................................................12
4.2.4 Implementation of the correction.......................................................................14
5. CAMERA INTERFACE................................................................................................16
5.1 POWER INPUT ............................................................................................................. 16
5.2 LED INDICATORS ........................................................................................................ 17
5.3 DATA CONNECTOR ...................................................................................................... 18
5.4 RS-232 PORT ............................................................................................................. 19
5.5 PROGRAMMING CONNECTOR........................................................................................ 19
6. MECHANICAL STRUCTURE......................................................................................20
6.1 MECHANICAL DIMENSIONS AND MOUNTING OF THE CAMERA ........................................... 20
6.2 ATTACHMENT FOR OPTICS ........................................................................................... 20
7. OPTICAL CONSIDERATIONS....................................................................................21
7.1 SPECTRAL RESPONSE ................................................................................................. 21
7.2 SELECTION OF OPTICS ................................................................................................. 22
7.2.1 Modulation transfer function..............................................................................22
7.2.2 Resolution and field of view...............................................................................23
7.2.3 Depth of field and working aperture ..................................................................24
8. LIGHTING ....................................................................................................................25
8.1 SPECTRAL RADIANCE AND COLOUR TEMPERATURE ........................................................ 25
8.2 UNIFORMITY OF LIGHTING ............................................................................................ 25
9. TECHNICAL SPECIFICATIONS .................................................................................27
10. APPENDIXES ..............................................................................................................29
10.1 APPENDIX A: CAMERA LINK®OUTPUT BIT PORT ASSIGNMENTS ................................ 30
10.2 APPENDIX B: TIMING DIAGRAMS ........................................................................ 31
10.2.1 B1: Parallel colour channels output modes.......................................................31
10.2.2 B2: Multiplexed colour channels output modes.................................................32
10.3 APPENDIX C: SERIAL COMMUNICATIONS ............................................................ 33
10.4 APPENDIX D: MODEL NUMBERS FOR XIIMUS CAMERAS ..................................... 51
10.5 APPENDIX E: ORDERING CODES FOR XIIMUS CAMERAS..................................... 52
10.6 APPENDIX F: APPLICATION NOTES ..................................................................... 54
10.6.1 TVI-AN701: Using encoder inputs for triggering ...............................................54
10.7 APPENDIX G: COOLING OPTION ......................................................................... 56
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XIIMUS R-GB-IR CL User Manual. Version 1.2
1. INTRODUCTION
The XIIMUS is a rugged, high performance, fully digital colour line scan camera for de-
manding industrial applications. It utilises a high accuracy 3-CCD architecture with a choice
of either 512, 1024 or 2048 pixel sensors at speeds up to 40 million pixels per second per
colour channel. The TVI Vision XIIMUS cameras are optimised for high sensitivity and
precise colour recognition.
The applications for the XIIMUS cameras include:
• web inspection
• inspection of natural materials like food, wood, ore, minerals and lumber
• recycling
• quality control in printing processes
• texture recognition
CUSTOMER SUPPORT
If you need to contact the manufacturer directly, please send your questions preferably by
email to TVI Vision. They will be forwarded to the responsible persons, who will contact you
as soon as possible.
Email: [email protected]
Fax: [phone]
Phone: [phone]
Address: Asentajankatu 3
00880 Helsinki
FINLAND
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XIIMUS R-GB-IR CL User Manual. Version 1.2
2. PRECAUTIONS
Read the manual
Please read the manual carefully before using the camera the first time.
Do not drop the camera
Handle the camera with care at all times, since it is a sensitive optical device. Do not drop the
camera and avoid mechanical shocks to the camera.
Keep foreign matter outside the camera
Do not spill liquids on the camera. The camera is not liquid or waterproof.
Do not drop any kind of objects or foreign material into the camera. Metallic objects might
cause short circuit and/or damage the optical assembly.
Cleaning
Keep the shade cap on the camera head when not used to avoid contaminating the prism.
The input surface of the prism is not shielded nor protected from the outside of the camera.
It is recommended that the camera is serviced by TVI Vision, if the front surface of the prism
is very dirty, since the surface area of the prism cannot be fully accessed from the front.
If there are small amounts of contaminants or dust on the prism surface, use a clean lint free
cotton swab or other non-abrasive medium dipped in acetone or pure alcohol to clean prism
surface. Shake excess solvent off before touching the surface of the prism to avoid streaking.
TVI Vision is not responsible for any scratches or damage inflicted by the customer to the
front surface of the prism.
To clean the exterior casing of the camera, use a soft, dry cloth. In case of severe stains use
a small amount of pure alcohol. Do not use isopropyl alcohol or acetone or other volatile sol-
vents such as benzene or thinners.
Do not open the camera
Do not open the camera. In doing so, the warranty of the camera will expire immediately.
Only authorised service personnel may open the camera.
Ventilation
Allow sufficient air circulation around the camera. If this condition is not met the camera might
shut down during operation, because it is designed to do so in order to prevent damage to
the optical assemblies. Further increase of the temperature may damage the camera.
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XIIMUS R-GB-IR CL User Manual. Version 1.2
Storage
Do not store the camera in a temperature over + 55 ºC or 131 F. There is a permanent tem-
perature indicator inside the camera, which is installed to ensure that if the camera is
damaged due to overheat, the warranty of the camera may be void.
Electromagnetic fields
Do not operate the camera in the vicinity of strong electromagnetic fields (above the require-
ments of CE conformity). This may cause erroneous operation of the camera.
Transporting
Preferably transport the camera in its original packaging. If the package is discarded, please
package with care in thick layer of soft, preferably anti-static material when transporting. Do
not use material that allows the camera to drop to the bottom of the package while trans-
porting. Do not transport with an objective attached. Let the camera slowly reach the ambient
temperature after transportation before powering it up the first time.
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XIIMUS R-GB-IR CL User Manual. Version 1.2
3. CAMERA OVERVIEW
3.1 Colour Separation
The incoming light is separated into three, Infrared, Red
and Bluegreen, colour images by an R-GB-IR beam
splitter (figure 3.1). The spectral distribution of each
colour is standardised and well known. By attaching a
CCD to each of these colour outputs, it is possible to
measure the intensity of each colour image.
Figure 3.1 The R-GB-IR colour separation beam splitter.
BLUEGREEN
INFRARED
INCOMING LIGH
T
RED
IR
R
GB
R-GB-IR colour line
3 x CCD
The CCDs are aligned to each other to
get the perfect image of the three
measured colour components. All the
three CCDs see exactly the same area
of the target from same viewing angle,
distance and at the same time.
Corresponding pixels of all the three
sensors are very precisely positioned
optically in the same place (figure 3.2).
This makes the colour analysis simpler
and does not require matching or
synchronising of separate colour lines.
The resolution of the camera is the
same as for the individual CCD array.
Figure 3.2. Alignment of the CCD linear arrays.
3.2 Camera Operation
The CCDs convert incoming light into electrical charge. The amount of charge generated in
each of the individual pixels is directly proportional to the intensity of light they receive. The
resulting charge packets are transferred into two high-speed CCD shift registers and trans-
ferred to the output charge-to-voltage converters of the CCDs. The generated output video is
Correlate Double Sampled (CDS) and amplified by two user accessible gain factors prior to
digitisation into 12 bits.
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XIIMUS R-GB-IR CL User Manual. Version 1.2
CTRL
DCDC
Vin
OSC
Ctrl out
voltage
monitoring
temperature
monitoring
TIMING
GAIN CTRL
AD12 bits
Data out
Ctrl in
AD
12 bits
AD12 bits
AD12 bits
AD
12 bits
AD12 bits
CCD
CDS
CDS
CCD
CDS
CDS
CCD
CDS
CDS
PCU
N
on volatil
e
memory
RS
232 2
2
Figure 3.3. The block diagram of the camera.
The XIIMUS cameras operate in a mono-shot mode. For each rising edge of the NewLine
signal the camera responds by sending out the digital data stream of the previous line scan
period time. The output frequency is constant. The distance in time between two NewLine
edges can be set to any value above the specified minimum. The reciprocal of this time is the
line rate (Hz).
The XIIMUS cameras have been optimised for high-speed applications. Therefore best per-
formance is achieved at line rates of hundreds of lines per second or above.
Line 1 Line 3
Line 0 Line 1 Line 2 Line 3
Data out
NewLine
Line 2
Line scan rate
( CC1 )
Figure 3.4. The relation of the data output and NewLine signals.
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XIIMUS R-GB-IR CL User Manual. Version 1.2
The effective integration time can be made shorter than the actual exposure time (time bet-
ween two consequent NewLine (CC1) pulses, Line scan period) by holding the ExpCtrl (CC2)
signal in its active stage until the beginning of the targeted interception period. Within the
exposure time, whenever the ExpCtrl input is held low, no charge can be collected into the
pixels. This is why the actual integration time is the distance in time of the (last) rising edge of
the ExpCtrl input signal and the next rising edge of the NewLine input.
Figure 3.5. The line rate and the integration time (data is drawn for muxed output mode).
The two most common operation modes of line scan cameras are free-run mode or encoder
input driven mode.
In the free run mode both the line rate and the integration time can be precisely controlled.
But if the line rate is determined by encoder input, the integration time can best be kept
constant by using the encoder input pulse for generating the ExpCtrl signal. The NewLine
pulse is sent after a constant delay (appendix F).
The XIIMUS camera is constantly monitoring all the internal supply voltages and the internal
temperature of the camera. Temperature warnings can be monitored via the LEDs of the rear
panel or by reading the status via serial communications.
Other functions include:
•colour channel specific programmable exposure control, analogue gain, digital
gain and offset
•retrieval of the firmware versions and serial number
•non-volatile memory banks for the programmable settings
•user programmable pixel correction unit
•test pattern generation for interfacing
•self-clocking mode for operation at fixed line rate without line request input
© TVI Vision, 18 October 2006 page 10 ( 57 )