Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1993-11-24
1995-05-09
Lerner, Martin
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 93, 359 94, 359105, 359253, 2522996, 25229967, 2522997, G02F 11335, G02F 11347, G02F 123
Patent
active
054145465
ABSTRACT:
Apparatus for filtering a wavelength of light includes a variable polarization rotator for supplying linearly polarized input light at a prescribed angle of polarization, a cholesteric liquid crystal variable dispersion device for rotating the plane of polarization of the plane polarized light from the variable polarization rotator an amount that is a function of the wavelength of such input light, and analyzer for blocking transmission of that light which is output by said variable dispersion device and has a plane of polarization which is crossed relative to the axis of polarization of the analyzer, while transmitting at least part of the light which does is not plane polarized in a direction that is crossed relative to the analyzer.
REFERENCES:
patent: Re32521 (1987-10-01), Fergason
patent: 2591701 (1952-04-01), Jaffe
patent: 3239671 (1966-03-01), Buhrer
patent: 3290619 (1966-12-01), Geusic et al.
patent: 3423686 (1969-01-01), Ballman et al.
patent: 3446966 (1969-05-01), Peterson
patent: 3945715 (1976-03-01), Drake
patent: 4017156 (1977-04-01), Moriyama et al.
patent: 4061417 (1977-12-01), Katagiri
patent: 4232948 (1980-11-01), Shanks
patent: 4239349 (1980-12-01), Scheffer
patent: 4251137 (1981-02-01), Knop et al.
patent: 4279474 (1981-07-01), Belgorod
patent: 4385806 (1983-05-01), Fergason
patent: 4436376 (1984-03-01), Fergason
patent: 4443065 (1984-04-01), Funada et al.
patent: 4444469 (1984-04-01), Kaye
patent: 4462661 (1984-07-01), Witt
patent: 4465969 (1984-08-01), Tada et al.
patent: 4540243 (1985-09-01), Fergason
patent: 4541691 (1985-09-01), Buzak
patent: 4583825 (1986-04-01), Buzak
patent: 4674841 (1987-06-01), Buzak
patent: 4726663 (1988-02-01), Buzak
patent: 4765719 (1988-08-01), Fergason
patent: 4770500 (1988-09-01), Kalmanash et al.
patent: 4988167 (1991-01-01), Fergason
patent: 5113271 (1992-05-01), Fergason
Hartshorne & Stuart, Crystals and The Polarising Microscope, 4th ed., American Elsevier Publishing Co. Inc. (New York, 1970) pp. 309-314.
LandOfFree
Dynamic optical notch filter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dynamic optical notch filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamic optical notch filter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1710187