Erect image finder

Details Erect image finder Erect image finder

1991-11-21

1993-08-10

Henry, Jon W.

Optical: systems and elements

Compound lens system

Telescope

359432, 354152, 354219, G03B 1306, G02B 2314, G02B 2302

Patent

active

052354601

ABSTRACT:
An erect image finder is provided in which a real erect image formed by an objective optical system can be observed through an erect image forming optical system having a plurality of reflecting surfaces and an eyepiece optical system. The erect image finder includes a plate-like mirror which constitutes a first reflecting surface of the erect image forming optical system, and a prism separate from the mirror which defines the other reflecting surfaces.

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patent: 5005955 (1991-04-01), Ohshita
patent: 5034763 (1991-07-01), Inabata
patent: 5083149 (1992-01-01), Kudo et al.
patent: 5091739 (1992-02-01), Kawamura
English abstract of Japanese Unexamined Patent Publication No. 63-226616.

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