Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Reexamination Certificate
2005-03-15
2005-03-15
Chang, Audrey (Department: 2872)
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
C359S003000, C430S001000, C430S002000, C349S201000
Reexamination Certificate
active
06867888
ABSTRACT:
Transmission and reflection type holograms may be formed utilizing a novel polymer-dispersed liquid crystal (PDLC) material and its unique switching characteristics to form optical elements. Applications for these switchable holograms include communications switches and switchable transmission, and reflection red, green, and blue lenses. The PDLC material of the present invention offers all of the features of holographic photopolymers with the added advantage that the hologram can be switched on and off with the application of an electric field. The material is a mixture of a polymerizable monomer and liquid crystal, along with other ingredients, including a photoinitiator dye. Upon irradiation, the liquid crystal separates as a distinct phase of nanometer-size droplets aligned in periodic channels forming the hologram. The material is called a holographic polymer-dispersed liquid crystal (H-PDLC).
REFERENCES:
patent: 3432225 (1969-03-01), Rock
patent: 3565509 (1971-02-01), Sulzbach
patent: 4003629 (1977-01-01), Baues et al.
patent: 4006963 (1977-02-01), Baues et al.
patent: 4022947 (1977-05-01), Grubb et al.
patent: 4673241 (1987-06-01), Nishiwaki et al.
patent: 4688900 (1987-08-01), Doane et al.
patent: 4923269 (1990-05-01), Healey
patent: 4938568 (1990-07-01), Margerm et al.
patent: 4994204 (1991-02-01), Doane et al.
patent: 5096282 (1992-03-01), Margerum et al.
patent: 5182665 (1993-01-01), O'Callaghan et al.
patent: 5198912 (1993-03-01), Ingwall et al.
patent: 5227906 (1993-07-01), Tokumitsu
patent: 5332618 (1994-07-01), Austin
patent: 5340701 (1994-08-01), Desobry
patent: 5363228 (1994-11-01), DeJule et al.
patent: 5488681 (1996-01-01), Deacon et al.
patent: 5544268 (1996-08-01), Bischel et al.
patent: 5680233 (1997-10-01), Faris et al.
patent: 5706375 (1998-01-01), Mihailov et al.
patent: 5748272 (1998-05-01), Tanaka et al.
patent: 5751452 (1998-05-01), Tanaka et al.
patent: 5771320 (1998-06-01), Stone
patent: 5832148 (1998-11-01), Yariv
patent: 5915051 (1999-06-01), Damask
patent: 5937115 (1999-08-01), Domash
patent: 5942157 (1999-08-01), Sutherland et al.
patent: 6115152 (2000-09-01), Popovich et al.
patent: 6172778 (2001-01-01), Reinhorn et al.
patent: 6211976 (2001-04-01), Popovich et al.
patent: 0 856 765 (1998-01-01), None
patent: 0 856 766 (1998-01-01), None
patent: 0 867 749 (1998-03-01), None
patent: 60189729 (1985-09-01), None
patent: WO 9727519 (1997-01-01), None
patent: WO 9909440 (1998-08-01), None
R. L. Sutherland, V. P. Tondiglia, L. V. Natarajan, T. J. Bunning, W. W. Adams, “Electrically switchable volume gratings in polymer-dispersed liquid crystals”, Appl. Phys. Lett, vol. 64, No. 9, Feb. 28, 1994, pp. 1074-1076.*
L. Sutherland, L. V. Natarajan, V. P. Tondiglia, T. J. Bunning, “Bragg gratings in acrylate polymer consisting of periodic polymer-dispersed liquid-crystal planes”, Chem. Mater., vol. 5, 1994, pp. 1533-1538.*
V. P. Tondiglia, L. V. Natarajan, R. L. Sutherland, T. J. Bunning, W. W. Adams, “Volume holographic image storage and electro-optical readout in a polymer-dispersed liquid-crystal film”, Opt. Lett., vol. 20, No. 11, Jun. 1, 1995, pp. 1325-1327.*
R. L. Sutherland, L. V. Natarajan, V. P. Tondiglia, R. L. Crane, “Switchable Volume Hologram Materials and Devices”, PCT WO 98/04650, Published Feb. 5, 1998.*
Sutherland, Richard L., “Polarization and Switching Properties of Holographic Polymer-Dispersed Liquid-Crystal Gratings. I. Theoretical Model,”J. Opt. Soc. Am. B, vol. 19, No. 12, pp. 2995-3003, Dec., 2002.
Sutherland, Richard L., et al., “Polarization and Switching Properties of Holographic Polymer-Dispersed Liquid-Crystal Gratings. II. Experimental Investigations,”J. Opt. Soc. Am. B, vol. 19, No. 12, pp. 3004-3012, Dec., 2002.
Sutherland, Richard L., et al., “Evolution of Anisotropic Reflection Gratings Formed in Holographic Polymer-Dispersed Liquid Crystals,”Applied Physics Letters, vol. 79, No. 10, pp. 1420-1422, Sep. 3, 2001.
Bowley, Chris C., et al., “Variable-Wavelength Switchable Bragg Gratings Formed in Polymer-Dispersed Liquid Crystals,”Applied Physics Letters, vol. 79, No. 1, pp. 9-11, Jul. 2, 2001.
“Handbook of Advanced Electronic and Photonic Materials and Devices,”Liquid Crystals, Display, and Laser Materials, vol. 7, Academic Press, Cover, Copyright Page, Table of Contents (xiii-xvi), pp. 67-103, Copyright 2001.
Cramer, Neil B., et al., “Kinetics of Thiol-Ene and Thiol-Acrylate Photopolymerizations with Real-Time Fourier Transform Infrared,”Journal of Polymer Science: Part A: Polymer Chemistry, vol. 39, pp. 3311-3319, 2001.
Warren, Garfield T., et al., “P-81: In-Situ Spectroscopy of Holographically Formed Polymer Dispersed Liquid Crystal Materials for High Performance Reflective Display Applications,”SID Digest of Technical Papers, San Jose, pp. 866-869, 2001.
Sutherland, Richard L., et al., “Switchable Holograms for Displays and Telecommunications”Proceedings of SPIE, vol. 4463, pp. 1-10, 2001.
Bowley, C. C., et al., “Improved Reflective Displays Based on Polymer-Dispersed Liquid Crystals,”J. Opt. Technol., vol. 67, No. 8, pp. 717-722, Aug., 2000.
Domash, L., et al., “Holographic PDLC for Photonic Applications,”Proceedings of SPIE, vol. 4107, pp. 46-58, 2000.
Bunning, T. J., et al., “Holographic Polymer-Dispersed Liquid Crystals (H-PDLCs),”Annu. Rev. Mater. Sci., vol. 30, pp. 83-115, 2000.
Cole, Michael C., et al., “Photoinitiatorless Photopolymerizations Involving Monomers That Form Charge Transfer Complexes,”Radtech Technical Proceedings, Tokyo, Japan, pp. 211-220, Dec., 2000.
Natarajan, L. V., et al., “Electrically Switchable Reflection Gratings in Polymer Dispersed Liquid Crystals,”Mat. Res. Soc. Symp. Proc., vol. 559, pp. 109-116, 1999.
Klosterman, A. M., et al., “Voltage Creep in Holographic PDLC Gratings,”Mat. Res. Soc. Symp. Proc., vol. 559, pp. 129-134, 1999.
Montemazzani, G., et al., “Light Diffraction at Mixed Phase and Absorption Gratings in Anisotropic Media for Arbitrary Geometries,”Physical Review E, vol. 55, No. 1, pp. 1035-1047, Jan., 1997.
Tondiglia, V. P., et al., “Effects of Varying Surfactants on the Electro-Optical Switching Characteristics of Volume Holograms Recorded in PDLC's,”Mat. Res. Soc. Symp. Proc., vol. 479, pp. 235-240, 1997.
Drzaic, P. S., “Phase Separation Methods for PDLC Films,” inLiquid Crystal Dispersions, World Scientific, Singapore, pp. 30-59, 1995.
Jacobine, A. F., “Thiol-Ene Photopolymers (Chapter 7),” inRadiation Curing in Polymer Science and Technology—vol. III, Polymerization Mechanisms, Elsevier Applied Science, Cover Page, Copyright Page, Table of Contents (v-vi), pp. 219-268, Copyright 1993.
Luck, Russell M., et al., “Shrinkage in Conventional Monomers During Polymerization (Chapter 1),” inExpanding Monomers: Synthesis, Characterization, and Applications, CRC Press, Inc., Cover Page, Copyright Page, Table of Contents (1 p.), 1-61.
Yamagishi, Frederick G., et al., “Morphological Control in Polymer-Dispersed Liquid Crystal Film Matrices,”SPIE, vol. 1080, pp. 24-31, 1989.
Wu, Bao-Gang, et al., “Response Times and Voltages for PDLC Light Shutters,”Liquid Crystals, vol. 5, No. 5, pp. 1453-1465, 1989.
Smith, G. W., et al., “The Interfacial Free Energy of Nematogen Droplets in an Isotropic Matrix: Determination of its Temperature Dependence from Coalescence Kinetics,”Mol. Cryst. Liq. Cryst., vol. 174, pp. 49-64, 1989.
Kogelnik, Herwig, “Coupled Wave Theory for Thick Hologram Gratings,”The Bell System Technical Journal, vol. 48, No. 9, pp. 2909-2947, Nov., 1969.
M. Escuti, C. C. Bowley, G. P. Crawford, S. Zumer, Jadranska, Slovenia, “5.3: A Model of the Fast-Switching Polymer-Stabilized IPS Configuration”,SID International Symposium, Digest of Technical Papers, p. 32.
C. C. Bowley, A. K. Fonte
Epling Bob
Hagan Bill
Kelly William
Sutherland Richard L.
Chang Audrey
Kilpatrick & Stockton LLP
Lavarias Arnel C.
Science Applications International Corporation
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