Real time laser spot tracking in both horizontal and vertical ax

Details Real time laser spot tracking in both horizontal and vertical ax Real time laser spot tracking in both horizontal and vertical ax

1992-12-10

1994-05-24

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

358481, H01J 314

Patent

active

053151127

ABSTRACT:
An optical system in which arrays of pseudo-corner cube retro reflectors are used to provide optical feedback of the horizontal and vertical positions of a scanning beam. The arrays of reflectors are located above and below the path of the scanning beam near the photoreceptor. The horizontal and vertical position information is then used to correct the alignment of the scanning beam.

REFERENCES:
patent: 4980549 (1990-12-01), Baldwin
patent: 5006705 (1991-04-01), Saito et al.
patent: 5012089 (1991-04-01), Kurusu et al.
patent: 5018808 (1991-05-01), Meyers et al.

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