View finder optical system with eye direction detection device

Details View finder optical system with eye direction detection device View finder optical system with eye direction detection device

1990-10-18

1992-10-13

Mathews, A. A.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

354225, 351210, 359600, G03B 1306

Patent

active

051555166

ABSTRACT:
A view finder optical system including a window of an eye piece portion comprising an eye cup having a contact surface, a shape of the contact surface being made so as to incline an axis of the lens with respect to an axis of the eye piece. The shape of the contact surface is curved corresponding to the lens's shape. The contact surface is made so as to conform to a lens of glasses.

REFERENCES:
patent: 2381101 (1945-08-01), Bausch
patent: 3738238 (1973-06-01), Hager
patent: 3842431 (1974-10-01), Sakuma
patent: 4264123 (1981-04-01), Mabie
patent: 4381892 (1983-05-01), Someya
patent: 4523818 (1985-06-01), Lang et al.
patent: 4576593 (1986-03-01), Miura et al.
patent: 4630903 (1986-12-01), Jones

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