Optical system for a real image type view finder

Details Optical system for a real image type view finder Optical system for a real image type view finder

1996-04-24

1998-05-19

Henry, Jon W.

Optical: systems and elements

Compound lens system

Telescope

359834, 359613, 396834, G02B 2314, G02B 504, G02B 1708, G03B 1302

Patent

active

057543364

ABSTRACT:
An optical system for a real image type view finder having an objective lens system and an ocular lens system, including a first deflector and a second deflector. The first deflector has a first reflection surface which reflects on-axis light, incident thereupon along an optical axis of the objective lens system, towards an optical axis of the ocular lens system. The second deflector has an incident surface upon which light, reflected by the first deflector, is made incident, and second and third reflection surface to internally reflect that light incident upon the incident surface, before emitting the light through an exit surface toward the ocular lens system. The on-axis light incident upon the first deflector and the light reflected by the first deflector defines an acute angle therebetween. The second deflector satisfies the following relationships:

REFERENCES:
patent: 3601477 (1971-08-01), Miyazaki
patent: 3952321 (1976-04-01), Matui
patent: 4926201 (1990-05-01), Mukai et al.
patent: 5323264 (1994-06-01), Kato
patent: 5376984 (1994-12-01), Abe
patent: 5565950 (1996-10-01), Taguchi et al.

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