Integrated optical sensor arrangement with detecting means, and

Details Integrated optical sensor arrangement with detecting means, and Integrated optical sensor arrangement with detecting means, and

1991-04-08

1992-05-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250237G, 25023116, G01J 132

Patent

active

051130661

ABSTRACT:
In an integrated optical arrangement, such as a photoelectric position measuring arrangement, a diffraction grid is scanned by light beam diffraction by a scanning unit having a laser. A light beam bundle emanating from the laser is split by the diffraction grid into two diffraction beam bundles, which are inserted into the top input waveguides of a waveguide coupler by two coupling elements. The two diffraction beam bundles interfere in the waveguide coupler and impinge on three detectors located at three output waveguides of the waveguide coupler for obtaining measured values. For readjustment of the optimal emission wavelength of the laser, an additional diffraction beam bundle emanating from the diffraction grid is entered into said integrated optical sensor arrangement by an additional coupling element. The additional beam bundle triggers a detector for generating a control signal to control the optimal emission wavelength of the laser.

REFERENCES:
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patent: 4403352 (1983-09-01), Huignard et al.
patent: 4724314 (1988-02-01), Caimi
patent: 4815081 (1989-03-01), Mahlein et al.
patent: 4938595 (1990-07-01), Parriaux et al.
patent: 4954786 (1990-09-01), Yamakawa et al.
patent: 4998043 (1991-03-01), Unami et al.

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