Optical apparatus

Details Optical apparatus Optical apparatus

1976-09-23

1980-01-15

Engle, Samuel W.

Optics: measuring and testing

Range or remote distance finding

With photodetection

244 316, 250205, 362290, G01C 308, G01J 132, F41G 300, G01J 136

Patent

active

041836642

ABSTRACT:
Various embodiments of optical apparatus incorporating a foraminous plate to define a field of view are disclosed. In a first embodiment, the foramina in a foraminous plate are cylindrical with the field of view defined by the ratio of the diameter of each foramen to the thickness of the foraminous plate. The presence, or absence, of a target within the field of view is determined by the electrical signal out of a photodetector actuated by light passing through the foramina. In particular, embodiments illustrating the use of the disclosed optical apparatus as a sensor in a guided missile, the foraminous plate and photodetector are movably mounted in such a missile to allow either bearing or range of a target to be determined.

REFERENCES:
patent: 2653516 (1953-09-01), Johnson
patent: 2699515 (1955-01-01), Williams
patent: 3361912 (1968-01-01), Lundberg
patent: 3461295 (1969-08-01), Camack
patent: 3670198 (1972-06-01), Lehovec et al.
patent: 3780967 (1973-12-01), Evers et al.
patent: 3919543 (1975-11-01), Noren

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