Optical path equalizer

Details Optical path equalizer Optical path equalizer

1994-08-18

1996-01-16

Hellner, Mark

Optics: measuring and testing

Range or remote distance finding

With photodetection

359212, 359223, 358494, G01C 308

Patent

active

054852633

ABSTRACT:
An optical system for adjusting the optical path between a detector and an object, such as an information-encoded label affixed to a package. The optical system comprises a pair of movable mirrors and an array of fixed mirrors. One of the movable mirrors is positionable to direct an image reflected from the object to any one of the array of fixed mirrors. The other of the movable mirrors is positionable to direct the image reflected by the fixed mirror to the detector. The positions of the movable mirrors are adjusted responsive to variations in the measured height of different objects.

REFERENCES:
patent: 3617105 (1971-11-01), Konrad
patent: 3797908 (1974-03-01), Ward et al.
patent: 4136821 (1979-01-01), Sugiura et al.
patent: 4877949 (1989-10-01), Danielson et al.
patent: 5064259 (1991-11-01), Frank
patent: 5185822 (1993-02-01), Miura
patent: 5216230 (1993-06-01), Nakazawa
patent: 5308966 (1994-05-01), Danielson et al.

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