Optical device

Details Optical device Optical device

1999-03-24

2000-08-01

Perkey, W. B.

Photography

Eye tracking

396104, 396121, G03B 1336, G03B 1700

Patent

active

060978937

ABSTRACT:
In an optical device having a line of sight detection circuit for detecting the line of sight of a user, a focus area selection circuit for selecting at least one of a plurality of focus areas on the basis of the detection result of the line of sight detection circuit, a focus detection circuit for detecting the focus state of the focus area selected by the focus area selection circuit, and a lens moving circuit for moving a lens, a control circuit controls the focus detection circuit and the lens moving circuit to repeat operation for checking if focus detection has become possible without moving the lens for a predetermined period of time when the detection result of the focus detection circuit indicates that focus detection is impossible, and to repeat the operation for checking if focus detection has become possible while moving the lens when the detection result of the focus detection circuit indicates that focus detection is impossible even after an elapse of the predetermined period of time.

REFERENCES:
patent: 4459006 (1984-07-01), Sakai et al.
patent: 5614985 (1997-03-01), Odaka
patent: 5907723 (1999-05-01), Inoue

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