Optical apparatus having a visual axis direction detecting devic

Details Optical apparatus having a visual axis direction detecting devic Optical apparatus having a visual axis direction detecting devic

1994-06-22

1995-01-31

Blankenship, Howard B.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

354 62, 354219, 351210, G03B 300, G03B 1302, G03B 2900

Patent

active

053862589

ABSTRACT:
An optical apparatus includes a viewer for viewing an object therethrough, a light receiving device for receiving a reflected light beam from an eyeball of an observer looking into the viewer, and a device for obtaining at least one optical constant of the eyeball from the electrical signal of the light receiving device, effecting correction during the calculation of the direction of the visual axis by the use of the optical constant, and producing a signal indicative of the direction of the visual axis.

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patent: 5182443 (1993-01-01), Suda et al.
patent: 5214466 (1993-05-01), Nagano et al.
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patent: 5253008 (1993-10-01), Konishi et al.
patent: 5260734 (1993-11-01), Shindo
patent: 5280312 (1994-01-01), Yamada et al.
patent: 5298297 (1994-03-01), Takei

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