Diopter correcting apparatus

Details Diopter correcting apparatus Diopter correcting apparatus

1995-05-30

1997-04-08

Perkey, W. B.

Photography

With viewfinder

Lens detail

G03B 1302

Patent

active

056197390

ABSTRACT:
This specification discloses an apparatus in which data regarding the proper lens positions of a diopter correcting lens when an observer is wearing spectacles and when the observer is not wearing spectacles are pre-stored in a memory circuit, the presence or absence of the spectacles is detected by a detecting circuit for detecting the state of an anterior eye part, the data in the memory circuit are extracted in conformity with this state, and the diopter correcting lens is moved on the basis of these data.

REFERENCES:
patent: 4300818 (1981-11-01), Schachar
patent: 4828381 (1989-05-01), Shindo
patent: 5182443 (1993-01-01), Suda et al.
patent: 5335035 (1994-08-01), Maeda

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