TR-33 TR-34 TR-35 Trillium Rhino User's Manual - Frame Grabbers

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10 Trillium User’s Manual Figure 3. Trillium Block Diagram Camera Timing Sensor Timing FPGA Programming Serial Bus Internal Serial Bus Multi Mode Parallel Bus 11-16V dc Timing Generation 10 bit Digitizer & FPGA Based DSP 10 Bit Digitizer & FPGA Based DSP 10 Bit Digitizer & FPGA Based DSP (Future Post Processor) Embedded Controller DC-DC Coverters Comms, Control & Power Interfaces 3 * 8 Bit LVDS Outputs + LVAL, STROBE EXSYNC/PR PR, Trigger RS232 Lens Aperture Control Sensor Control Timing Analog CCD O/P Sensor Driver Board Analog CCD O/P Sensor Driver Board Analog CCD O/P Sensor Driver Board DC Power RS232 EXSYNC/PR External DC Input 03-32-10119-03 DALSA
Trillium User’s Manual 11 1.4 CCD Camera Primer i For more background and detail on how beamsplitter cameras work, see DALSA’s “Common Optical Axis Cameras” application note, doc# 03-32- 00364 How CCD Image Sensors Work In a camera such as the Trillium, a CCD image sensor converts photons (light) into electrons (charge). When photons hit an image sensor, the sensor accumulates electrons. This is called charge integration. The brighter your light source, the more photons available for the sensor to integrate, and the smaller the amount of time required to collect a given amount of light energy. The way photosensitive elements (pixels) on CCD image sensors collect charge has often been compared to wells or buckets filling with water. From this analogy comes the term "full-well capacity," meaning the maximum charge (number of electrons) a pixel well can hold without "spilling" charge onto adjacent pixels. As an image sweeps over a line of pixels, the pixels collect charge. At certain intervals, the sensor transfers its collected charge to one or more readout registers, which feed each pixel’s charge from the image sensor into an output node that converts the charges into voltages. After this transfer and conversion, the voltages are amplified to become the camera’s analog output. In digital output cameras, the camera’s analog-to-digital (A/D) board converts voltages to digital numbers (0- 255 for 8-bit cameras, 0-4095 for 12-bit cameras). These digital numbers are what the camera outputs as data to a frame grabber. DALSA 03-32-10119-03
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TR-33 TR-34 TR-35 Trillium Rhino User's Manual - Frame Grabbers

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