Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2005-12-09
2008-08-05
Nelms, David C. (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S086000, C349S088000, C349S092000, C349S093000, C349S094000, C349S200000
Reexamination Certificate
active
07408601
ABSTRACT:
Inhomogeneous concentrated polymer network with approximately 90° twisted nematic liquid crystal (TN-LC) is used for fabricating lens and prisms. For forming a positive lens, the approximately 90° TN-LC polymer network concentration can gradually decrease from the center to the side edges. For forming a negative lens, the approximately 90° TN-LC polymer network concentration can gradually increase from the center to the side edges. The lens can be created by ultra violet (UV) light exposure to patterned photo masks. The lens can be tuned by applying voltage above the threshold voltage to the polymer network. The inhomogeneous 90° TN-LC polymer network can also be used in Fresnel lens and prisms. Applications of the invention can be used for micro lens, array, optical communication, micro-optics, adaptive optics and beam steering.
REFERENCES:
patent: 4572616 (1986-02-01), Kowel
patent: 5071229 (1991-12-01), Oaki et al.
patent: 5150234 (1992-09-01), Takahashi et al.
patent: 5499127 (1996-03-01), Tsubota et al.
patent: 5627665 (1997-05-01), Yamada et al.
patent: 5699133 (1997-12-01), Furuta
patent: 5919606 (1999-07-01), Kazlas et al.
patent: 6219113 (2001-04-01), Takahara
patent: 6355315 (2002-03-01), Kubota et al.
patent: 6864951 (2005-03-01), Ren et al.
patent: 2002/0097355 (2002-07-01), Kralik et al.
patent: 2002/0181126 (2002-12-01), Nishioka
patent: 2005/0179855 (2005-08-01), Helgee et al.
“Phase-only modulation with twisted nematic liquid-crystal spatial light modulators,” N. Konforti, et.al.,Optic Letters, vol. 13, No. 3, Mar. 1988, pp. 251-253.
“Electrically tunable and polarization insensitive Fabry-Perot etalon with a liquid-crystal film,” J. S. Patel et. al.,Applied Physics Letters, vol. 58 No. 22.
“Polarization insensitive tunable liquid-crystal etalon filter”, J. S. Patel, et al,Applied Physics, Lett. 59, Sep. 1991, pp. 1314-1316.
Cylindrical Liquid crystal lens and its applications in optical pattern correlation systems: H.E. Zhan, et al.Jpn. J. Appl. Phys.vol. 34 (1995) pp. 2392-2395.
“Transient Properties of a liquid-crystal microlens” Mao Me, et al,Jpn J. Appl. Phys.vol. 40 (2001) pp. 6012-6016.
“Inhomogeneous nanoscale polymer-dispersed liquid crystals with gradient refractive index”, Hongwen Ren, et al, Applied Physics Letters, vol. 81, No. 19, Nov. 4, 2002, pp. 3537-3539.
“Simulations of liquid-crystal Fabry-Perot etalons by an improved 4×4 matrix method,” Yuhua Huang, et. al.,Journal of Applied Physics, vol. 93, No. 5, Mar. 1, 2003, pp. 2490-2495.
Huang Yuhua
Ren Hongwen
Wu Shin-Tson
Zhu Xinyu
Chien Lucy P
Law Offices of Brian S. Steinberger , P.A.
Nelms David C.
Research Foundation of the University of Central Florida, Inc.
Steinberger Brian S.
LandOfFree
Electronically tunable polarization-independent micro lens... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electronically tunable polarization-independent micro lens..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronically tunable polarization-independent micro lens... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3996030