Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1992-12-24
1993-10-26
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356 28, G01V 904
Patent
active
052568857
ABSTRACT:
An apparatus for detecting the velocity information of an object comprises a light source; optical system for irradiating beam from the light source, which is provided with a first lens or lens group and a second lens or lens group having an identical focal distance which are arranged apart from each other substantially two times such focal distance along the direction of the optical axis, to irradiate the beam onto the measuring object through the first and second lenses or lens group, and the optical system being arranged so as to make the value of sin .theta./.lambda. substantially constant where .theta. is the incident angle of the beam irradiated onto the measuring object and .lambda. is the wavelength of the beam; and detector for detecting the scattering rays of light from the measuring object irradiated by the above-mentioned optical system to detect the velocity information of the measuring object. With the constituents thus arranged, the apparatus is capable of effectively preventing the deviation of the intersecting position of the beams irradiated on the measuring object to perform a high-precision detection of the velocity information at all times.
REFERENCES:
patent: 3756723 (1973-09-01), Hock
patent: 4242194 (1980-12-01), Steiner et al.
patent: 4669876 (1987-06-01), Dopheide
patent: 4697922 (1987-10-01), Gunter, Jr. et al.
patent: 4729109 (1988-03-01), Adrian et al.
"Doppler Velocimeter Using Diffraction Grating and White Light" by C. P. Wang; Applied Optics, vol. 13; No. 5; May (1974) pp. 1193-1195.
"Two-dimensional Bragg cell LDV system using multiple light frequencies" by W. Michael Farmer; Applied Optics, vol. 17, No. 2, Jan. 1978 pp. 166-168.
"Grating diffraction spectra as coherent light sources for two-or three-beam interferomerty" by A. Lohmann; Optical Acta; Int'l Journal of Optics vol. 9, No. 1, Jan. 1962 pp. 1-12.
Nuclear Instruments & Methods in Physics Research./B vol. 40/41, No. II Apr. 1989, Amsterdam, NL pp. 1178-1181; W. G. Davies "The design of ion-optial systems for medical and industrial application", paragraphs 4-paragraph 5; FIGS. 2-3.
Ishida Yasuhiko
Kadowaki Hidejiro
Sugiyama Hiroshi
Takamiya Makoto
Canon Kabushiki Kaisha
Le Que T.
Nelms David C.
LandOfFree
Doppler velocimeter having a diffraction grating and dual lens g does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Doppler velocimeter having a diffraction grating and dual lens g, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Doppler velocimeter having a diffraction grating and dual lens g will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-961065