Optical tracking, focusing, and information receiving device inc

Details Optical tracking, focusing, and information receiving device inc Optical tracking, focusing, and information receiving device inc

1986-07-23

1988-04-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

356152, G01J 120

Patent

active

047406828

ABSTRACT:
A precision optical tracking, stabilization, focusing, and information receiving system is described. This invention is designed to improve optical systems in two important areas. The first application is in systems that require both reception of information and target tracking using a single beam. A transparent pyramid with a truncated vertex (frustum of a pyramid) is used to split a beam into 5 parts. The central axial part is used as an information carrier, and the other four are used for tracking. The second application is for precise focusing. The light beam is focused onto the vertex of a frustum of a pyramid and the intensity of the central fraction of the beam, as compared with the side fractions, decreases as the focal point is moved away from the surface of the pyramid in either direction.

REFERENCES:
patent: 3478219 (1969-11-01), Nutz
patent: 4225781 (1980-09-01), Hammons

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