Projection lens scanning laser velocimeter system

Details Projection lens scanning laser velocimeter system Projection lens scanning laser velocimeter system

1985-01-18

1986-12-30

Buczinski, Stephen C.

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

356 28, G01P 336

Patent

active

046325484

ABSTRACT:
A laser Doppler velocimeter (LDV) system (10) has a laser (12), a waist position adjusting lens (13), and a beam splitter (15), which direct laser beams (14) parallel to optical axis (16) of negative lens (18). Negative lens (18) is fixed relative to afocal lens pair (24,26). A pair of planar mirrors (20, 22) intersect at right angles and respectively intersect optical axis (16) and optical axis (28) of the afocal lens pair. Mirrors (20, 22) are movable along optical axis (28) toward and away from afocal lens pair (24, 26) to focus laser beams (14) in focus area (30) while maintaining a constant beam waist, crossing angle and intersection with other laser beams to produce a constant sensitive volume as the focus is changed.

REFERENCES:
patent: 3860342 (1975-01-01), Orloff et al.
patent: 3895872 (1975-07-01), Dandliker et al.
patent: 3897152 (1975-07-01), Farmer et al.
patent: 3946233 (1976-03-01), Erben et al.
patent: 4063814 (1977-12-01), Rhodes
patent: 4148585 (1979-04-01), Bargeron et al.
patent: 4167329 (1979-09-01), Jelalian et al.
patent: 4346990 (1982-08-01), Rhodes
patent: 4537503 (1985-08-01), Liu

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