Optical equipment of fiber laser Doppler velocimeter

Details Optical equipment of fiber laser Doppler velocimeter Optical equipment of fiber laser Doppler velocimeter

1990-02-28

1991-05-07

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356 285, G01N 1506, G01P 336

Patent

active

050139282

ABSTRACT:
A beam expander is used with a perforated concave lens and a plano convex lens to expand a beam diameter to make a small measurement volume to increase an intensity of light scattered, which contributes a reduction of a number of an optical components and a complicated optical adjustment, and makes a small probe diameter. The perforated part of the expand lens plays a role of a space filter to cut off troublesome light scattered when a beam passes through a lens. A three points supporting mechanism adjustment of the focused beam positioning into the fiber core and the incident beam aperture adjustment in the fiber's numerical aperture are used. A high resolution of the adjustment is achieved so that a high transmitting efficiency of a laser power into the fiber is achieved.

REFERENCES:
S. L. Kaufman and L. M. Fingerson, Fiber Optics in LDV Applications, International Conference on Laser Anemometry-Advances and Applications, 16th-18th Dec. 1985, Manchester, U.K.

Affiliated with

Also associated with

Rating

Optical equipment of fiber laser Doppler velocimeter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical equipment of fiber laser Doppler velocimeter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical equipment of fiber laser Doppler velocimeter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-941242