Chiral smectic liquid crystal multipass optical filters includin

Details Chiral smectic liquid crystal multipass optical filters includin Chiral smectic liquid crystal multipass optical filters includin

1992-10-27

1995-11-21

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 73, 359100, 359260, G02F 1133, G02F 11335, G02F 113

Patent

active

054692792

ABSTRACT:
This invention provides a multipass Solc filter which utilizes liquid crystal variable retarders to provide high resolution and tunability. The Solc polarization-interference effects are used synergistically with the Fabry-Perot cavity resonances. The cavity comprises a central retarder, two quarter wave plates, and an optional isotropic spacer. The central retarder or the isotropic spacer can include liquid crystal cells to provide tuning of the Solc envelope or the cavity resonances respectively. In one embodiment the variable retarder is a three element quarter-half-quarter device with a liquid crystal electro-optically rotatable half-wave plate. Reflection mode configurations are introduced wherein, because of the bilateral symmetry of the Solc filter, it is possible to use only half of the intracavity elements. Criteria for designing filter parameters to meet resolution, out-of-band discrimination, and tuning range requirements are provided.

REFERENCES:
patent: 4232948 (1980-11-01), Shanks
patent: 4367924 (1983-01-01), Clark et al.
patent: 4394069 (1983-07-01), Kaye
patent: 4563059 (1986-01-01), Clark et al.
patent: 4772104 (1988-09-01), Buhrer
patent: 4779959 (1988-10-01), Saunders
patent: 4790634 (1988-12-01), Miller et al.
patent: 5068749 (1991-11-01), Patel
patent: 5132826 (1992-07-01), Johnson et al.
patent: 5321539 (1994-06-01), Hirabayashi et al.
Funfschilling et al., "Fast Responding . . . Displays", J. Appl. Phys. 66(8), 15 Oct. 1989, pp. 3877-3882.
Sharp et al., "Continuously tunable smectic A* liquid-crystal color filter", Optics Letters, vol. 15, No. 10, 15 May 1990, pp. 523-525.
Andersson et al., "Device . . . Effect", J. Appl. Phys. vol. 66, No. 10, Nov. 15, 1989, pp. 4983-4995.
Masterson et al., "Ferroelectric . . . Tunable Filter", Optics Letters, vol. 14, No. 22, Nov. 15, 1989, pp. 1249-1251.
Sharp et al., "Smectic . . . Tunable Filters", Ferroelectrics vol. 114, 1991, pp. 55-69.
Katzenstein, "New Type of Birefringent filter", J. Opt. Soc. America, vol. 58, No. 10, Oct. 1968, pp. 1348-1355.
Williamson, "Simple Multiple-Pass, Birefringent Filter", vol. 61, No. 6, Jun. 1971, pp. 767-769.
Weis et al., "Electromagnetic . . . Structures", J. Opt. Soc. America, vol. 4, No. 9, Sep. 1987, pp. 1720-1740.
Maeda et al., "Electronically . . . Systems", IEEE Photonics Tech. let., vol. 2, No. 11, Nov. 1990, pp. 820-822.
Biemacki et al., "Polarization . . . Modulation", Proceedings of SPIE Conference: Liquid Crystal Devices and Materials, San Jose, Calif., Feb. 25-27, 1991, pp. 167-178.
Title et al., "Tunable Birefrigent Filters", Optical Engineering vol. 20, No. 6, Dec. 1981, pp. 815-823.
Hirabayashi et al., "New . . . Systems", IEEE Photonics Tech. Let, vol. 3, No. 8, Aug. 1991, pp. 741-743.
Beckers,"Achromatic linear Retarders", Applied Optics, vol. 10, No. 4, Apr. 1971, pp. 973-975.
Wilson et al., Optoelectronics: An Introduction, 1983, p. 104.

Affiliated with

Also associated with

Rating

Chiral smectic liquid crystal multipass optical filters includin 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 multipass optical filters includin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chiral smectic liquid crystal multipass optical filters includin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1141881