Scanning afocal laser velocimeter projection lens system

Details Scanning afocal laser velocimeter projection lens system Scanning afocal laser velocimeter projection lens system

1979-09-07

1982-08-31

Buczinski, S. C.

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

350453, G01P 336, G02B 300

Patent

active

043469906

ABSTRACT:
A method and apparatus for projecting and focusing parallel laser light beams from a laser doppler velocimeter on a target area. The system includes three lenses. Two lenses work together as a fixed afocal lens combination. The third lens is a movable scanning lens. Parallel laser beams travel from the velocimeter through the scanning lens and through the afocal lens combination and converge, i.e. are focused, somewhere beyond. Moving the scanning lens relative to the fixed afocal combination results in a scanning of the focus area along the afocal combination's optical axis.

REFERENCES:
patent: 3860342 (1975-01-01), Orloff et al.
patent: 3895872 (1975-07-01), Dandliker
patent: 4167329 (1979-09-01), Jelalian et al.

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