DISPLACEMENT MEASURING DEVICE BASED ON SEMICONDUCTOR INJECTION LASER WITH EXTERNAL OPTICAL FEEDBACK Russian patent published in 1998 - IPC

Abstract RU 2102705 C1

FIELD: optical measurements. SUBSTANCE: device has optical head consisting of injection laser, photodiode, microscope objective and controlled filter. In addition, device has control unit which includes regulator of laser current and temperature, triangle-voltage generator, photocurrent-to-voltage converter, selective amplifier, and indicator. Use is also made of pulse phase detector, comparator and reversible counter. EFFECT: higher measurement results. 3 dwg

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RU 2 102 705 C1

Authors

Kotova S.P.

Chernyshov A.K.

Jakutkin V.V.

Dates

1998-01-20Published

1995-07-12Filed