Photoelectric switching apparatus

Details Photoelectric switching apparatus Photoelectric switching apparatus

1987-05-06

1990-10-16

Rosenberger, Richard A.

Optics: measuring and testing

Angle measuring or angular axial alignment

Alignment of axes nominally coaxial

350445, H01H 3500

Patent

active

049630210

ABSTRACT:
A photoelectric switching apparatus comprises: a light projecting device; a photo sensing device; an objective lens having a double structure comprising an outer peripheral portion and a central portion each of which acts as a lens; and a reflecting surface to deflect the lights on the optical axis of the central portion of the objective lens to the side. An elongated portion which extends on the optical axis of the central portion of the objective lens and has the reflecting surface at the end portion thereof is formed integrally with the objective lens.

REFERENCES:
patent: 2701501 (1955-02-01), Cuny
patent: 2750677 (1956-06-01), Wirth
patent: 2841048 (1958-07-01), Duncan et al.
patent: 3584227 (1971-06-01), Matsas
patent: 4017186 (1977-04-01), Shofner
patent: 4746179 (1988-05-01), Dahne et al.
IBM Technical Disclosure Bulletin, vol. 22, No. 12, May 1980, pp. 5288-5290, W. B. Archey et al: "Low Loss Optical Coupler" (whole article).

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