Atmel AKYLA HD 20 LV User manual

Features
•3-CCD Prismatic Color Linescan Camera
•High Sensitivity and High SNR Performance Linear CCD Sensors
•1024 Pixels 10 x 10 µm or 14 x 14 µm
•2048 Pixels 10 x 10 µm
•Excellent CCD Alignment Accuracy
•LVDS Format Data Rate: 20, 25, 33, up to 40 Mpixels/s
•Dynamic Range: 12-bit Channel
•Single Power Supply: 20 to 36 VDC
•Flat Field Correction Included
•Easy Camera Control with Programmable Settings
•Memory for Storing up to 60 Configurations
•High Reliability - CE and FCC Compliant
Description
The AKYLA™is a rugged, high-performance, fully digital color linescan camera for
demanding industrial applications. It consists of a high-accuracy 3-CCD architecture
with a choice of either 1024 or 2048 pixel sensors at speeds up to 40 million pixels per
second and per color channel. The AKYLA cameras are optimized for high sensitivity
and precise color recognition.
Applications
• Web Inspection
• Inspection of Natural Materials like Food, Wood, Ore, Minerals and Lumber
• Recycling
• Quality Control in Printing Processes
• Texture Recognition
LVDS
3-CCD Color
Linescan
Camera
AKYLA™
HD 20/25/33/40
1010/1014/2010 LV

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1. Precautions
1.1 Manual
Read the manual carefully before using the camera for the first time.
1.2 Camera Handling
The camera is a sensitive optical device, handle with care at all times. Do not drop the camera
and avoid mechanical shock to the camera.
1.3 Foreign Matters
Do not spill liquids on the camera. The camera is not waterproof.
Do not drop metallic objects into the camera. Doing so may cause a short-circuit and damage
the camera.
1.4 Cleaning
Keep the shade cap on the camera head when it is not in use to avoid contaminating the prism.
If the front surface of the prism is very dirty, we recommend the camera be serviced by Atmel,
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 its sur-
face. Shake excess solvent off before touching the prism surface to avoid streaking. Atmel is not
responsible for scratches or damage inflicted by the customer to the front surface of the prism.
To clean the camera’s exterior casing, use a soft, dry cloth. In case of severe stains, use a small
amount of pure alcohol or isopropyl alcohol. Do not use acetone or other volatile solvents such
as benzene or thinners.
1.5 Servicing
Do not open the camera. The camera’s warranty expires immediately upon opening. Only autho-
rized service personnel may open the camera.
1.6 Ventilation
Allow sufficient air circulation around the camera. If this condition is not met, the camera may
shut down during operation; it is designed to do so to prevent damage to the optical assemblies.
Further increase of temperature may damage the camera.
1.7 Storage
Do not store the camera at a temperature over 55°C. There is a permanent temperature indica-
tor inside the camera, which is installed to ensure that if the camera is damaged due to over-
heating, the warranty of the camera becomes void.
1.8 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.

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1.9 Transportation
Transport the camera in its original packaging. If the original packaging has been discarded,
package the camera with care in a thick layer of soft, preferably anti-static material. Do not use
material that may cause the camera to fall to the bottom of the package while transporting. Do
not transport with the optics attached.
2. Camera Characteristics Overview
Note: 1. LSB in 12-bit mode
2. Measured front face temperature
Table 2-1. Camera Characteristics Overview
Parameter Value Unit
Sensor Characteristics at Maximum Pixel Rate
Data rate 20 MHz 25 MHz 33 MHz 40 MHz MHz
Resolution 1024 2048 1024 2048 1024 2048 1024 2048 Pixels
Max line rate 17.8 9.3 22 11.5 27.3 14.1 34.4 18.3 kHz
Anti-blooming x 100 –
Radiometric Characteristics
Dynamic range 8 - 12 Bit
Spectral range 400 - 700 nm
Non-linearity < 0.1 %
Typical gain range Gmin
0
Gmax
30 dB
Saturation equivalent exposure
Red
Green
Blue
10 µm pitch
96
120
151
14 µm pitch
38
48
61
10 µm pitch
240
130
100
14 µm pitch
1.2
1.5
4.8
(1)
LSB/(nJ/cm2)
LSB/(nJ/cm2)
LSB/(nJ/cm2)
S/N 69 42 dB
Mechanical and Electrical Interface
Size (w x h x l) 115 x 106 x 122 mm
Lens mount F –
Sensor alignment <0. 2 max, 0.1 typical Pixel
Power supply DC, single 20 to 36 V
Power dissipation < 26 W
Operating temperature 5 to 40 (non-condensing) cooling is required for 33 and 40 MHz camera °C
Storage temperature -10 to 55 (non-condensing) °C

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3. Technical Specifications
Notes: 1. Measured front face temperature.
2. For 33.3 MHz and 40 MHz cameras, additional cooling is required when the ambient temperature is above 20°C.
3. Within 5 to 95% of the saturation exposure. Equals ±4 LSB on a 10-bit scale when gains are above 300.
Table 3-1. Technical Specifications of the AKYLA HD Series of Cameras with 10 µm Sensors
Parameter Symbol Min Typical Max Unit Notes
Number of pixels N
N–1024 2048 –––
Pixel size – – 10 x 10 – µm 100% fill factor
Data rate per CCD – – – 40 MHz –
Gain control G – 100x – – Response time: 500 ms max.
A/D conversions – – 12 – bit –
Supply voltage Vsupp 20 24 36 VDC
Ripple: ±10%, voltage + ripple must
stay within 20 to 36 V
Power consumption – – 12 to 17 26 W –
Weight m – 1.3 – kg Without lens
Operating temperature Top 5–40 °C 41 to 104°F (1)(2)
Storage temperature Tst -10 – 55 °C 14 to 131°F
Humidity, operation – 5 – 85 % Relative, non-condensing
Humidity, storage – 5 – 95 % Relative, non-condensing
Linearity – – 99.6 – % (3)
Photo response non-
uniformity, pixel-to-pixel PRNU – ±2 ±10 % –
Saturation level – – 4095 4095 DU Digital units
Table 3-2. Technical Specifications of the AKYLA HD Series of Cameras with 14 µm Sensors
Parameter Symbol Min Typical Max Unit Notes
Number of pixels N – 1024 – – –
Pixel size – – 14 x 14 – µm 100% fill factor
Data rate per CCD – – – 40 MHz –
Gain control G 12x 100x – – Response time: 500 ms max
A/D conversions – – 12 – bit –
Supply voltage Vsupp 20 24 36 VDC
Ripple: ±10%, voltage + ripple must
stay within 20 to 36 V
Power consumption – – 12 to 17 26 W –
Weight m – 1.3 – kg Without lens
Operating temperature Top 5–35 °C 41 to 95°F(2)
Storage temperature Tst -10 – 55 °C 14 to 131°F

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Notes: 1. Measured front face temperature
2. For 33.3 MHz and 40 MHz cameras, additional cooling is required when the ambient temperature is above 20°C.
3. Within 5 to 95% of the saturation exposure. Equals ±4 LSB on a 10-bit scale when gains are above 300
4. Conformity
4.1 Standard
The cameras have been tested using the following equipment:
• Shielded power supply cable
• CameraLink®data transfer cable ref. 14B26-SZLB-500-OLC (3M)
• Linear AC-DC power supply
Atmel recommends using the same configuration to ensure compliance with the following
standards.
4.2 European
AKYLA cameras comply with the requirements of the European directive 89/336/EEC, EMC
(Electromagnetic Compatibility) . We herewith declare that this product complies with the follow-
ing provisions.
• Emission CISPR 22 (1997)
• Immunity IEC 61000-6-2 (1999)
5. Camera Overview
5.1 Color Separation
The incoming light is separated into three (Red, Green and Blue) color images by an RGB beam
splitter (Figure 5-1). The spectral distribution of each color is standardized and well-known. By
attaching a CCD to each of these color outputs, it is possible to measure the intensity of each
color image.
Humidity, operation – 5 – 85 % Relative, non-condensing
Humidity, storage – 5 – 95 % Relative, non-condensing
Linearity – – 99.6 – % (3)
Photo response non-
uniformity, pixel-to-pixel PRNU – ±2 ±10 % –
Saturation level – – 4095 4095 DU Digital units
Table 3-2. Technical Specifications of the AKYLA HD Series of Cameras with 14 µm Sensors (Continued)
Parameter Symbol Min Typical Max Unit Notes

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Figure 5-1. RGB Color Separation Beam Splitter
The CCDs are aligned to obtain a perfect image of the three measured color components. All
three CCDs see exactly the same area of the object at the same time. The corresponding pixels
of all three sensors are optically positioned in the same place (Figure 5-2). This makes color
analysis simpler and does not require any line matching or synchronizing. The resolution of the
camera is the same as for the individual CCD array.
Figure 5-2. Alignment of CCD Linear Arrays
6. Optical Considerations
6.1 Spectral Response of the Beam Splitter Prism
Figure 6-1. Spectral Distribution of the RGB Color Beam Splitter
Blue
Green
Red
Incoming Light
B
RGB Color Line
3 x CCD
Transmission (%)
0
400 450 500 550
Wavelength (nm)
blue green red
600 650 700
20
40
60
80
100

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Figure 6-1 shows the prism’s reaction at each wavelength. Transmissivity is well balanced, both
in the sense of peak response and the total amount of light passed to the sensors at each wave-
length (sum of the three separate curves). This all results in excellent color separation compared
to tri-linear CCD sensors.
Figure 6-2. Spectral Response of AKYLA Cameras
Figure 6-2 illustrates the spectral transmissivity measurements of the beam splitter prism and
the spectral sensitivity of the CCDs.
6.2 Camera Operation
The CCDs convert the incoming light to electrical charges. 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 transferred
to the output charge-to-voltage converters of the CCDs. The generated output video is Correlate
Double Sampled (CDS) and the result is amplified by two user-accessible gain factors prior to
digitization into 12 bits.
Relative Spectral Response (%)
0
20
40
60
80
100
120
350 400 450 500 550 600 650 700 750
Wavelength (nm)

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Figure 6-3. Camera Synoptic
The AKYLA HD cameras operate in a monoshot mode. For each rising edge of the NewLine sig-
nal, the camera responds by sending out the digital data stream of the previous linescan time
period. The output frequency is constant. The distance in time between two NewLine edges can
be set to any value above the specified minimum. The reverse of this time is the line rate (Hz).
The AKYLA HD cameras have been optimized for high-speed applications. Therefore, best per-
formance is achieved at line rates of hundreds of lines per second or above.
Other programmable functions include:
• Color channel specific programmable exposure control
• Color channel specific programmable analog gain
• Color channel specific programmable digital gain
• Programmable offset
• Retrieval of the PROM version number
• Non-volatile memory banks for programmable settings
AD
AD
CCD
AD
AD
CCD
AD
A
CDS
CDS
CDS
CDS
CDS
CDS D
CCD
CTRL
PCU
DC
DC
VIN
OSC
Ctrl Out
Data Out
Timing
Temperature
Monitoring
Voltage
Monitoring
Non Volatile
Memory
Gain Ctrl
12-bit
12-bit
12-bit
12-bit
12-bit
12-bit
Ctrl In
RS-232 2
2

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7. Timing
Figure 7-1. Relationship Between the Data Output and NewLine (CC1) Signals
The effective integration time can be made shorter than the actual linescan period (time between
two consequent NewLine pulses) by holding the ExpCtrl (CC2) signal in its active state until the
beginning of the targeted interception period. Within the linescan period, whenever the ExpCtrl
input is held low, no charge can be collected into the pixels. This is why the actual integration
time is the time span between the (last) rising edge of the ExpCtrl input signal and the next rising
edge of the NewLine input.
Figure 7-2. Line Rate and Integration Time
The two most common modes of operation of linescan cameras are free-run mode or encoder
input-driven mode.
In the free-run mode, both the linescan period and the integration time can be precisely con-
trolled. But if the linescan period is determined by an encoder input, the integration time can best
be kept constant by using the encoder input pulse for generating the ExpCtrl signal. The New-
Line pulse is sent after a constant delay (see ”Exposure Control Mode (Address 204)” on page
30).
The AKYLA camera constantly monitors all the internal supply voltages and the internal temper-
ature. Temperature warnings can be monitored via the LED of the rear panel and the
temperature output signal of the data connector.
Line 1
Line 0 Line 1 Line 2 Line 3
Line 2 Line 3
Data Out
NewLine
(CC1)
Line Scan Period
NewLine
Exp Ctrl
Pixel Strobe
Data
Data Read Out
Line Scan Period
Integration Time
R R
N
N N+1
N-1
GGBB

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7.1 Timing Diagrams
Figure 7-3. Parallel Color Channel Mode, 20/25 MHz per Channel
Figure 7-4. Timing Diagram
NewLine
Input
Change of Line
Internal
ExpCtrl
Input
Line Valid
Output
Pixel Strobe
Output
Data 35-0
N = 1024 or 2048
N-1 N - - 1 2 3 N-2
T9
T7
T6
T5
T2
T3
T4 T5
T4
T1
T8
N-1 N - - 1 2
T3
Table 7-1. Timings
Symbol Parameter Min Nom Max Unit
T1 NewLine low 0.05 10 – µs
T10
T11
T12
i - 2
Pixel Strobe
Data 35-0 i - 1 i i+1