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Chapter 3 Photoelectric conversion-2

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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Chapter 3 Photoelectric conversion-2

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    7. 10 Charge coupled device (CCD)

    12. Signal processing CCD—Amplifying—Double value processing—Counting. CCD—Amplifying—Filtering—Comparing and formatting—Filling pulses—Counting. CCD—Amplifying-Sampling and keeping synchronously—A/D converting with high rate—Image processing by CPU CCD—Amplifying—Filtering—Changing into TV signal—Memorizing

    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

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