Optical scanning system and method including correction for cros

Details Optical scanning system and method including correction for cros Optical scanning system and method including correction for cros

1988-08-09

1990-01-16

Dzierzynski, P. M.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351205, A61B 310

Patent

active

048939200

ABSTRACT:
An apparatus and method for correcting cross scan error in a two coordinate optical scanning system where the two scanners are spaced apart in the optical system. An anamorphic lens is positioned between the scanner which is introducing the cross scan error and the second scanner, with the lens being formed and positioned so that the focal length on the coordinate of scan from the first scanner is different from its focal length on the coordinate of scan orthogonal to it. An object lens is placed between the second scanner and the object being scanned. This lens in an ophtalmoscope is the lens of the eye.

REFERENCES:
patent: 4768873 (1988-09-01), Webb

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