Apparatus for detecting a sight axis

Details Apparatus for detecting a sight axis Apparatus for detecting a sight axis

1997-03-05

1998-02-10

Perkey, W. B.

Photography

Eye tracking

396277, 396280, G03B 1302

Patent

active

057179590

ABSTRACT:
Apparatus for detecting a sight axis may be used with a device for detecting the attachment of a detachable power supply. Forming structure is provided for forming information corresponding to a sight axis of a viewer of the apparatus. Structure is also provided for detecting when the power supply of the apparatus is switched on. Setting structure is provided for setting a first control mode for controlling the apparatus on the basis of the information formed by the forming means, and a second control mode for controlling the apparatus without utilizing the information. Control circuitry is provided for preferably causing the setting structure to automatically set the second control mode when the power supply is detected as being switched on. Preferably, a first storage area is provided for storing correction data unique to the viewer and used for correcting the sight axis information. A second storage area may be provided for storing correction data corresponding to an average of unique correction data from a plurality of viewers. When the unique correction data cannot be used, the average correction data may be substituted therefor. Also, a photographing operation can be delayed until after the sight axis data is corrected. Further, the power supply may be switched off a predetermined time after the sight axis data has been calculated if an exposure operation is not then commanded.

REFERENCES:
patent: 4924251 (1990-05-01), Ishimara et al.
patent: 5036347 (1991-07-01), Tsunekawa et al.
patent: 5182443 (1993-01-01), Suda et al.
patent: 5214466 (1993-05-01), Nagano et al.
patent: 5245371 (1993-09-01), Nagano et al.
patent: 5260734 (1993-11-01), Shindo
patent: 5280312 (1994-01-01), Yamada et al.
patent: 5386258 (1995-01-01), Nagano

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