Technical note
Distance image sensors
S11961-01CR, S11962-01CR, S11963-01CR, S12973-01CT
Contents
1. Features............................................................................................................................................ 2
2. Structure........................................................................................................................................... 2
3. Operating principle............................................................................................................................. 4
3-1. Phase difference (indirect) TOF (time-of-flight)............................................................................... 4
3-2. Timing chart................................................................................................................................ 7
3-3. Charge drain function................................................................................................................... 7
3-4. Non-destructive readout............................................................................................................... 8
3-5. Subtracting signals caused by ambient light ................................................................................... 9
3-6. Calculating the frame rate .......................................................................................................... 10
4. How to use...................................................................................................................................... 11
4-1. Configuration example ............................................................................................................... 11
4-2. Light source selection................................................................................................................. 11
5. Distance measurement examples ...................................................................................................... 11
5-1. Distance measurement (S11961-01CR, S12973-01CT) .................................................................. 11
5-2. Short distance measurement (S11961-01CR, S12973-01CT).......................................................... 13
5-3. Improving the distance accuracy by averaging the measurement data............................................ 14
5-4. Measuring the distance to a cylinder............................................................................................ 15
5-5. Distance measurement (using S11961-01CR, S12973-01CT) using pulse laser diode........................ 17
5-6. Distance measurement (S11963-01CR)........................................................................................ 18
5-7. Short distance measurement (S11963-01CR)................................................................................ 20
6. Calculating the incident light level...................................................................................................... 21
7. Calibration....................................................................................................................................... 28
7-1. Calculating the sensitivity ratio (SR) ............................................................................................ 30
7-2. Linear range and nonlinear range................................................................................................ 30
8. Characteristics................................................................................................................................. 32
8-1. Light incident angle characteristics.............................................................................................. 32
8-2. Distance accuracy vs. incident signal level.................................................................................... 33
8-3. Temperature characteristics of distance accuracy.......................................................................... 34
9. Evaluation kit................................................................................................................................... 34
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