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US 5,182,443 AGranted
Optical apparatus having visual axis detector and determining whether eyeglasses are worn
AssigneeCanon Kabushiki Kaisha
InventorsYasuo Suda, Akihiko Nagano, Kazuki Konishi
Life of this patent
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Abstract
An optical apparatus includes a view finder through which a subject is observed, a visual axis detection device for detecting a direction of a visual axis of an observer who is looking into the view finder, and a determination device for determining whether or not the observer is wearing eyeglasses.
Claims15
An optical apparatus comprising:
- a view finder through which a subject is observed;
- a visual axis detection means for detecting a direction of a visual axis of an observer who is looking into said view finder;
- and
- a determination means for determining whether or not the observer is wearing eyeglasses.
1 more element
The optical apparatus having a device for detecting a direction of a visual axis of an observer who is looking into a view finder, said apparatus comprising:
- a means of emitting rays of light toward an eye of the observer;
- a light-receiving means including a light-receiving optical system for receiving a light reflected by the observer, and a plurality of photo sensors for receiving the light from said light-receiving optical system;
- and
- a signal processing means for processing a signal output from said photo sensors to determine reflection from an eyeglass and for producing a signal representing that the observer is wearing the eyeglasses.
1 more element
Dependencies are inferred from the claim text.