Movement-direction determination apparatus

Details Movement-direction determination apparatus Movement-direction determination apparatus

2006-09-19

2006-09-19

Lee, Hwa (Andrew) (Department: 2877)

Optics: measuring and testing

By light interference

Having polarization

C356S512000, C356S498000

Reexamination Certificate

active

07110120

ABSTRACT:
A laser beam is irradiated onto a moving object, and scattered light reflected from the moving object is split into two beams, which are then received through respective spatial filters that are 90° out of phase with each other, thereby providing two signals. The signals are processed to determine the movement direction of the moving object.

REFERENCES:
patent: 3820896 (1974-06-01), Stavis
patent: 6246482 (2001-06-01), Kinrot et al.
patent: 6914682 (2005-07-01), Kato
patent: 2005/0094154 (2005-05-01), Baney et al.

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