Optical: systems and elements – Polarization without modulation – Polarizarion by dichroism
Patent
1983-04-28
1994-04-05
Moskowitz, Nelson
Optical: systems and elements
Polarization without modulation
Polarizarion by dichroism
359485, H01S 302, G02B 2728
Patent
active
053010094
ABSTRACT:
In order to protect a delicate photo-detector from high-intensity optical radiation such as from a laser, a device for limiting power to the detector is interposed between the radiation and detector. This device has two embodiments and is made such that high-intensity radiation is totally reflected. In the absence of high-intensity radiation, total reflection is frustrated, and desired radiation passes to the detector. Both embodiments use two prisms with parallel surfaces skewed to incident radiation and with a slightly absorbant optical material between the surfaces. Desired radiation normally passes through the prisms and the material to the detector. In one embodiment, the material is a liquid which vaporizes in response to high-intensity radiation, and in the other embodiment, the material expands and pushes the prisms apart. In either case, transmission of radiation halts, and the radiation is totally reflected by a prism skewed surface.
REFERENCES:
patent: B527669 (1976-01-01), Paulsen
patent: 2240988 (1941-05-01), Hertel
patent: 3213752 (1965-10-01), Ruderman
patent: 3267807 (1966-08-01), Swope et al.
patent: 3301624 (1967-01-01), Morriss
patent: 3492062 (1970-01-01), Hoover
patent: 3602576 (1971-08-01), Kohler et al.
patent: 3612653 (1971-10-01), Rajchman
patent: 3614211 (1971-10-01), Letter
patent: 3792916 (1974-02-01), Sarna
patent: 3834795 (1974-09-01), Erichsen et al.
patent: 3967582 (1976-07-01), Roberts et al.
patent: 3982206 (1976-09-01), Poulsen
patent: 3985426 (1976-10-01), McNaney
patent: 3985428 (1976-10-01), McNaney
patent: 4009453 (1977-02-01), Mahlein
patent: 4322979 (1982-04-01), Fromm
Hayes, "Laser Safety System", Feb. 1972, pp. 2776-2771 IBM Tech. Disc. Bu, vol. 14, #9.
Leeb, "Variable Beam Attenuator for 10.6 .mu.m", May 1976, pp. 553-555, Rev. of Sci. Inst., vol. 47, #5.
Taylor, "Liquid Evaporator Light Deflector", Mar. 1972, pp. 586-593, Appl. Opt., vol. 11, #3.
Dunn Aubrey J.
Gibson Robert P.
Lee Milton W.
Moskowitz Nelson
The United States of America as represented by the Secretary of
LandOfFree
Frustrated total internal reflection optical power limiter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Frustrated total internal reflection optical power limiter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frustrated total internal reflection optical power limiter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-515720