Zoom finder

Details Zoom finder Zoom finder

1987-02-20

1989-03-14

Corbin, John K.

350432, 354167, 354222, G02B 1514, G02B 1318, G03B 1320, G03B 1310

Patent

active

048120235

ABSTRACT:
A zoom finder comprising a system for forming the image of a measuring field frame and a vari-focal system in the order from the object side and arranged that the apparent size of the measuring field frame varies at the time of zooming.

REFERENCES:
patent: 2755701 (1956-07-01), Altman
patent: 2859654 (1958-11-01), Back
patent: 3141921 (1964-07-01), Linke
patent: 4443068 (1984-04-01), Itoh
patent: 4609269 (1986-09-01), Kamata
patent: 4652104 (1987-03-01), Harvey
patent: 4725130 (1988-02-01), Ozawa

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