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Position sensitive device (PSD) is a kind of new photoelectric device which would produce different electrical signals when the input light point irradiates at the different position of PSD surface. The intensity and the dimension of the input light point have nothing to do with the output value
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7. 10 Charge coupled device (CCD)
12. Signal processing CCDAmplifyingDouble value processingCounting.
CCDAmplifyingFilteringComparing and formattingFilling pulsesCounting.
CCDAmplifying-Sampling and keeping synchronouslyA/D converting with high rateImage processing by CPU
CCDAmplifyingFilteringChanging into TV signalMemorizing
25. TTL Logic Being Driven by 0pto-Isolators
26. Opto-Isolator Used to Perform a Logic Function
27. TTL Logic Driving Opto-isolators
28. Typical Opto-Isolators
32. Incremental encoder
33. The structrue of encoder
37. Absolute encoder
38. 3.1.5 Phototransistor
43. Principle:
Sagnac effect
Optical path
difference
(phase
difference )
is changed with
rotate rate
of system
46. Test