Real image finder

Details Real image finder Real image finder

1998-01-12

2000-01-25

Nguyen, Thong

Optical: systems and elements

Compound lens system

Telescope

359362, 396384, 396386, G02B 2300, G03B 1308

Patent

active

060184175

ABSTRACT:
A real image finder system is disclosed. The finder system includes a common objective optical system for forming a real image of an object. A first erecting optical system for erecting an object image formed by the objective optical system, a first eyepiece optical system for observing an image erected by the first erecting optical system, a branch plane which is constructed as one plane of a plurality of reflection surfaces included in the first erecting optical system, and guides a luminous flux from the objective optical system to proceed along a first optical path and/or along a second optical path different from the first optical path, a second erecting optical system which is arranged on the second optical path and erects an object image formed by the objective optical system, and a second eyepiece optical system for observing an image erected by the second erecting optical system.

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patent: 4972216 (1990-11-01), Ueda et al.
patent: 5034764 (1991-07-01), Inabata
patent: 5130855 (1992-07-01), Makai et al.
patent: 5537184 (1996-07-01), Harsushita
patent: 5587458 (1996-12-01), Itoh

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