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DATASHEET
Lighting
Imaging
Telecom
Imaging Product Line
LC1917 Series Cameras
Low-Profile Analog Line Scan Camera
Description
In the LC1917 analog line scan camera, PerkinElmer has combined the best features of photodiode array detection, high-speed charge-coupled scanning, and analog line scan camera technology to offer an uncompromising solution to the increasing demands of advanced imaging applications. The LC1917 is a low profile analog line scan camera. The LC1917 features a single channel differential analog video output format, with a resolution of 1024 pixels, which can achieve data rates of up to 5 MHz with exceptional noise immunity. It is designed for volume applications where a small profile is required. One feature of typical line scan cameras is a square profile face. While this shape is unavoidable for area scan cameras, it does not take advantage of the long, thin active area of linear arrays. The LC1917's flat faceplate measures 0.75" high by 2" wide. This size allows the user to install multiple LC1917s into an area scarcely big enough for even the smallest square front profile line scan camera. The LC1917 converts light imaged during a scene into an analog video signal. The amplitude of the video signal is a linear function of the incident illumination taken from the scene. Antiblooming structures within the sensor ensure superior performance over a wide range of lighting conditions. User-defined control is possible for line rate, integration time and video data rate. LC1917 cameras may be interfaced to most frame grabber cards, allowing for a tested, plug and play solution. Typical high performance line scan applications include position monitoring, edge and spot tracking, and acquisition of any image generated by shadows, light beams, or external optics.
Features
* 5 MHz output rate * Geometrically precise 14 m square pixel CCD * Small size: 0.75"H x 2"W x 3.077"L * High dynamic range (2500:1) * Antiblooming control * CE Mark * Adjustable gain and dark offset levels * Line scan rates to 4.7 kHz * Differential digital I/O signals for electrical noise immunity
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DSP-205.01A - 4/2001W Page 1
Analog Line Scan Cameras
LC1917-series cameras contain a high-performance, high-resolution line scan image sensor (PerkinElmer Optoelectronics parts RL1024PAG) featuring a pinned photodiode pixel. Each photodiode converts incident light into discrete charge packets. Advantages of pinned photodiode pixels include linear exposure control, the elimination of image lag, and the reduction of photo response nonuniformity (PRNU). For more specific sensor specifications and information, please consult the appropriate sensor datasheet, available by contacting PerkinElmer. Figure 1a details the spectral sensitivity of the sensor, while Figure 1b details the sensor's glass window light transmission curve.
The Sensor
Figure 1a. Spectral Sensitivity Curve (1X Gain)
100 90 80 70 60 50 40 30 20 10 0 250 350 450 550 650 750 850 950 1050 100 90
Right Scale
80 70 60 50 40 QE (%)
Responsivity (V/ J/cm2 )
Left Scale
30 20 10 0
Wavelength (nm)
Functional Description
The video signal from the sensor is processed through a single channel of sampled-and-held, raster order, analog video data. The video channel signal processing circuitry offers both adjustable gain and dark offset levels to allow customization of the camera to unique lighting applications. An operational amplifier in a differential configuration is recommended to receive the video signal. Figure 2 details the camera video processing.
Figure 1b. Sensor Window Transmission Curve
100 90 80
Transmission (%)
70 60 50 40 30 20 10 0 150 250 350 450 550 650 750 850 950 1050
Input Signals
The LC1917 camera requires DC supply voltages of +12 VDC, -12 VDC, and +5 VDC for operation. Table 3 further describes power requirements and voltages, along with tolerances. By default, the camera will operate at its maximum line rate of 4700 scans per second. The camera is controlled by two externally generated differential input signals: Master Clock (MCLK) and Line Transfer (LT). The Master Clock input determines the data rate frequency for values up to maximum clock of the camera (5 MHz). The data rate may be run from 1 MHz to cameras maximum clock rate. The LT input signal transfers the charge from each photosite to the readout registers. The readout registers, in turn, transport the charge from each photodiode in succession to the video outputs. The LT input from the user must remain in the ON state for at least one and a half MCLK cycles to initiate the internal line transfer and may remain ON until one
Wavelength (nm)
Figure 2. Camera Block Diagram
CLT+ CLTLT+ LT-
B
r uffe oH1
Line Transfer Logic LT
oH2 oAB oPG oRG oTG
MCLK+ MCLK-
LENS
IMAGER
Drive Logic
MCLK Logic
Trans
Level
CCLK+ CCLK-
FPGA LEN Line Enable Logic
LEN+ LENVOUT+
Amp
VIDEO
Sample and - Hold Offset ADJ Gain ADJ
VOUT-
+12VDC +5VDC -12VDC
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Analog Line Scan Cameras
Input Signals (contd.)
and a half clock cycles prior to the end of read out. Because there are extra stages in the CCD sensors readout register, a minimum number of MCLK cycles (the number of elements on the CCD sensor plus 41) must exist between successive LT commands. The maximum line-scan period is 20 milliseconds. Integration times longer than 20 ms can introduce higher levels of dark current, which reduces the dynamic range of the sensor. Longer integration times are possible, however, if the camera is cooled, which reduces dark current. Specific application characteristics, such as light level and rate of object motion, will determine the optimum setting. Timing details are shown in Figure 3.
Table 2. Camera Description
Parameter Physical Description No lens adaptor - optical Within 0.005" of of mounting hole 2" x 3.077" x 0.75" Connector Amp C-216297 26-pin High Density Male Cable Length Maximum 10 meters Power Requirements Operating Voltages +12 VDC, +5 VDC, -12 VDC Connection Through 26-pin connector Output Data Rate 1 - 5 MHz Type Analog Differential Video Connection Through 26-pin connector Control Signals User Supplied Master Clock (MCLK) Line Transfer (LT) User Communications RS-422 Control Signals Camera Supplied Camera Clock (CCLK) Line Enable (LEN) Camera Line Transfer (CLT) Connection Through 26-pin connector Sensor Type PerkinElmer RL1024PAG Window Glass Operational Gain Adjustment 5-Turn Potentiometer Dark Offset Adjustment 5-Turn Potentiometer Variable Optical Lens Sensor Alignment Dimensions Type
Output Signals
The LC1917-series camera provides three output synchronization signals: Camera Clock (CCLK), Line Enable (LEN), and Camera Line Transfer (CLT). The Camera Clock (CCLK) operates at the MCLK frequency and is synchronized to the analog video. The output of the CCLK signal can be used to capture analog video data by a frame grabber or digitizer. The Line Enable (LEN) signal brackets the valid analog video. The signal becomes high two CCLK periods before the first valid pixel and goes low two CCLK periods before the last valid pixel. The video output is a contiguous pixel data stream with a dynamic range (defined as peak video divided by rms pixel noise) of greater than 2500:1. The Camera Line Transfer (CLT) output signal is an internally generated sync signal. Its falling edge indicates the start of a line readout sequence. This signal may be used for controlling strobes, shutters or other accessories of the users system.
Figure 3. Camera Timing Diagram
CCLK

1024 CLKS
The minimum period between LT must be 41 + 1024 CLKS or 1065 clocks
LT minimum = 1.5 CLKS
CLT to LEN 11 CLKS
LEN leads and trails video by 2 CLKS
Video Signals
The LC1917 camera features an adjustable DC offset. This offset is controlled by a potentiometer, located underneath the set screw on the body side of the camera adjacent to active
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DSP-205.01A - 4/2001W Page 3
Video
LEN
CLT
CLT equals 6 CLKS
LT
Analog Line Scan Cameras
Video Signals (contd.)
pixel 1024. This dark offset allows the user to adjust the standard 0 V signal 100 mV. Additionally, the LC1917 camera features a user-adjustable video gain, allowing for video gains of up to 2.5X. Video gain is adjustable using the potentiometer, located underneath the set screw on the body side adjacent to the active pixel 1 side of the camera. Both the gain and offset potentiometers can also be adjusted by removing the bottom plate of the camera. This is accomplished by removing the two lower screws on both the faceplate and rear body of the camera. The camera bottom is not attached to any internal circuitry. Proper ESD precautions should be taken when removing the bottom plate of the camera. Failure to do so can result in camera failure.
Table 1. Pin Assignments
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Sym +12 VDC +12 VDC GND GND GND GND GND -12 VDC -12 VDC LT+ MCLK+ CCLK+ LEN+ CLT+ +5VDC GND GND VIDEO+ LTMCLKCCLKLENCLT+5 VDC GND VIDEODescription 12 VDC Input 12 VDC Input Power Supply Ground Power Supply Ground Power Supply Ground Power Supply Ground Power Supply Ground -12 VDC Input -12 VDC Input Line Transfer + Master Clock + Camera Clock + Line Enable + Camera Line Transfer + 5 VDC Input Power Supply Ground Power Supply Ground Video Out + Line Transfer Master Clock Camera Clock Line Enable Camera Line Transfer +5 VDC Input Power Supply Ground Video Out -
User Connections
The connector on the LC1917-series camera is a 26-pin high density male AMP C-216297. All user connections are via this connector. It contains all communications, output, and power connections needed for camera operation. Refer to Table 1 for pinout locations and details. Connector pin locations are shown in Figure 4.
Table 3. Power Requirements
Pin 1 2 8 9 15 24 Voltage +12 VDC +12 VDC -12 VDC -12 VDC +5 VDC +5 VDC Tolerance 0.5 V 0.5 V 0.5 V 0.5 V 0.2 V 0.2 V Power Requirement 100 mA max 100 mA max 100 mA max 100 mA max 200 mA max 200 mA max
Optical Interface and Mounting
The LC1917 is to be mounted to the user's optics via 4 M3 threaded screws, located on the front panel of the camera, adjacent to the sensor. The optical surface of the sensor is located 2.7mm (10%) from the surface face of the camera. The sensor has a maximum angular error of 15 milliradians.
Notes 1. Cable length should not exceed 10 meters. 2. Noise and ripple <15mV p-p.
Camera Performance
Figure 4. Connector Diagram
The camera head is housed in a rugged aluminum case, measuring 0.75"H x 2"W x 3.077"L (excluding connector extensions) specifically designed for close-proximity harsh industrial applications. The sensor is mounted on an aluminum plate that efficiently transfers heat to the camera case. The conductive cooling of this surface is useful in minimizing thermally generated dark current and noise of the camera system.
1 10 19 11
2 12 20
3 13 21
4 14 22
5 15 23
6 16 24
7
8 17 18 26
9
25
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Analog Line Scan Cameras
Table 4. Camera Specifications
Characteristic Active Pixel Count Pixel Size Pixel Spacing Spectral Response Dynamic Range4 Video Data Rate Video Saturation Level Typical (100 O ) Differential (100 O) Gain Control Dark Offset Saturation to FPN Dynamic Range Light Response Non-Uniformity1, 2 Saturation Exposure3 Photo Response Non-Uniformity Weight Cable Length Operating Temperature Storage Temperature
Notes 1. 635 nm 2. At 50% light saturation 3. 500 nm 4. Dynamic Range = VSAT/rms noise.
Min 250 1 1 -0.1 0 -40
Typ 1024 14 x 14 14 2500:1 0.75 1.4 0 40 3 0.15 10 -
Max 1000 5 2.5 0.1 6 20 10 55 80
Unit elements m m nm Ratio MHz V V Factor V dB % J/cm2 % ounces meters Celsius Celsius
Figure 5. Outline Drawings
MEASUREMENTS IN INCHES (MM)
3.077 (78.15) FRONT VIEW
0.75 (19.05)
M3 x 10 mm deep 2.00 (50.80) SIDE VIEW 0.750 (19.05) 3.077 (78.15)
FACEPLATE VIEW
0.750 (19.05)
Pixel 1 Indicator Sensor
0.375 (19.525)
0.500 (12.70)
2.00 (50.80)
1.772 (45.00)
* Sensor maximum angular error is 15 milliradians * Optical surface of sensor is 2.7 mm ( 10%) from surface of camera
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DSP-205.01A - 4/2001W Page 5
Analog Line Scan Cameras
Ordering Information
Table 5. Stock Part Numbers
Camera Model LC1917HAN-011 Resolution 1024 Max Data Rate 5 MHz
While the information provided in this data sheet is intended to describe the form, fit and function for this product, PerkinElmer reserves the right to make changes without notice.
For more information e-mail us at opto@perkinelmer.com or visit our web site at www.perkinelmer.com/opto. All values are nominal; specifications subject to change without notice.
Table 6. Sales Offices
North America
United States PerkinElmer Optoelectronics 2175 Mission College Blvd. Santa Clara, CA 95054 Toll Free: 800-775-OPTO (6786) Phone: +1-408-565-0830 Fax: +1-408-565-0703
Europe
Germany PerkinElmer Optoelectronics GmbH Wenzel-Jaksch-Str. 31 D-65199 Wiesbaden, Germany Phone: +49-611-492-570 Fax: +49-611-492-165
Asia
Japan PerkinElmer Optoelectronics NEopt. 18F, Parale Mitsui Building 8 Higashida-Cho, Kawasaki-Ku Kawasaki-Shi, Kanagawa-Ken 210-0005 Japan Phone: +81-44-200-9170 Fax: +81-44-200-9160 www.neopt.co.jp 47 Ayer Rajah Crescent #06-12 Singapore 139947 Phone: +65-770-4925 Fax: +65-777-1008
Singapore
(c) 2001 PerkinElmer Inc. All rights reserved.
PerkinElmer, the PerkinElmer logo and the stylized "P" are trademarks of PerkinElmer, Inc. Reticon is a registered trademark of PerkinElmer, Inc.
DSP-205.01A - 4/2001W
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