Abstract
Optical sensors have been widely used in various fields because of advantages such as noncontact, high sensitivity, and high precision. However, in these sensors radiation and detection parts are separately configurated on different steins, so that it is difficult to align the optical axis, to be compact, and to improve the stability against temperature variation. We have developed two types of compact sensor which include a laser diode and a photodiode in one body.
© 1990 Optical Society of America
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