Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1992-05-15
1993-09-07
Sikes, William L.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 53, 359 56, 359 73, G02F 1133
Patent
active
052434559
ABSTRACT:
Discretely and continuously tunable single and multiple-stage polarization interference filters employing chiral smectic liquid crystal cells as electronically rotatable retarders are provided. Discretely tunable filters of this invention include those which employ bistable surface-stabilized ferroelectric liquid crystal cells. Continuously tunable filters of this invention include those that employ chiral smectic A ferroelectric liquid crystal cells. Single stage filters include fixed birefringent elements in combination with chiral smectic liquid crystal cells and multiple stage filters can include only chiral smectic liquid crystal cells or can include chiral smectic liquid crystal cells in combination with fixed birefringent elements. Blocking filters useful for color generation and color displays are also provided. The FLC filters provided can be temporally multiplexed.
REFERENCES:
patent: 3540795 (1970-11-01), Harris
patent: 3912369 (1975-10-01), Kashnow
patent: 4129357 (1978-12-01), Title
patent: 4232948 (1980-11-01), Shanks
patent: 4394069 (1983-07-01), Kaye
patent: 4563059 (1986-01-01), Clark et al.
patent: 4674841 (1987-06-01), Buzak
patent: 4838663 (1989-06-01), Lagerwall
patent: 4958916 (1990-09-01), Clark et al.
patent: 5132826 (1992-07-01), Johnson et al.
Title et al. (Dec. 1981) Opt. Eng. 20:815.
Evans (Mar. 1948) J. Opt. Soc. Am. 39:229.
Weis et al. (Sep. 1987) J. Opt. Soc. Am. 4:1720.
Andersson et al. (Aug. 1987) Appl. Phys. Lett. 51:640.
Langerwall et al. (1989) Ferroelectrics 94:3-62.
PCT International Examination Report for PCT/US90/06288, dated Mar. 14, 1992.
PCT International Search Report, for PCT/US90/06288 dated Mar. 4, 1991.
Funfschilling et al. (Oct. 1989) J. Appl. Phys. 66(8):3877-3882.
Sharp et al. (May 1990) Opt. Lett. 15(10):523-525.
Sharp et al. (1991) Ferroelectrics 114:55-69.
Masterson et al. (Nov. 1989) Opt. Let. 14(22):1249-1251.
Andersson et al. (Nov. 1989) J. Appl. Phys. 66(10):4983-4995.
Johnson Kristina M.
Sharp Gary D.
Mai Huy K.
Sikes William L.
The University of Colorado Foundation Inc.
LandOfFree
Chiral smectic liquid crystal polarization interference filters does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Chiral smectic liquid crystal polarization interference filters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chiral smectic liquid crystal polarization interference filters will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-492030