Optical alignment device

Details Optical alignment device Optical alignment device

1992-05-18

1994-06-07

Ben, Loha

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351205, 351208, 351211, 351235, 351237, 351239, 359527, 359534, 359664, 359726, 359732, 356399, A61B 3028, G02B 5126, G01B 1100

Patent

active

053193997

ABSTRACT:
An optical device for aligning an instrument so that active zones in the instrument are the same distance from the plane of a remote object comprising a lens attached to the instrument, the lens having a curved outer surface and a mirrored back surface. When the active zones in the instrument are aligned parallel to the plane of the remote object and the remote object is illuminated, the proper alignment is indicated by light emanating from the object being focused on a preselected spot.

REFERENCES:
patent: 2095862 (1937-10-01), Frederick et al.
patent: 3072010 (1963-01-01), Brill
patent: 3442567 (1969-05-01), Hansen
patent: 4660929 (1987-04-01), Sick
patent: 4810073 (1989-03-01), Opheij

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