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LC1917HAN-011 Datasheet(PDF) 3 Page - PerkinElmer Optoelectronics |
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LC1917HAN-011 Datasheet(HTML) 3 Page - PerkinElmer Optoelectronics |
3 / 6 page Table 2. Camera Description Analog Line Scan Cameras www.perkinelmer.com/opto DSP-205.01A - 4/2001W Page 3 and a half clock cycles prior to the end of read out. Because there are extra stages in the CCD sensors readout regis- ter, 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 char- acteristics, such as light level and rate of object motion, will determine the optimum setting. Timing details are shown in Figure 3. 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 synchro- nized to the analog video. The output of the CCLK signal can be used to cap- ture 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. Video Signals The LC1917 camera features an adjustable DC offset. This offset is con- trolled by a potentiometer, located underneath the set screw on the body side of the camera adjacent to active Figure 3. Camera Timing Diagram CCLK LT The minimum period between LT must be 41 + 1024 CLKS or 1065 clocks LT minimum = 1.5 CLKS CLT CLT equals 6 CLKS LEN LEN leads and trails video by 2 CLKS Video 1024 CLKS CLT to LEN 11 CLKS Parameter Variable Description Physical Optical Lens No lens adaptor - optical Sensor Alignment Within ±0.005” of of mounting hole Dimensions 2” x 3.077” x 0.75” Connector Type 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 Input Signals (contd.) |
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