Optical: systems and elements – Glare or unwanted light reduction – With mirror
Patent
1991-05-15
1996-07-09
Shafer, Ricky D.
Optical: systems and elements
Glare or unwanted light reduction
With mirror
359883, 359884, 359900, 427165, 427166, 427167, 20419226, 20419227, 65 605, 65 608, 65 63, 428428, 4289122, G02B 508, G02B 1700
Patent
active
055350569
ABSTRACT:
A elemental mirror for vehicles having a luminous reflectance of at least about 30% includes a substrate coated with a thin layer of elemental semiconductor having an index of refraction of at least 3 and an optical thickness of at least about 275 angstroms. Preferably, the elemental semiconductor coating is sputter coated silicon or germanium and a light absorbing coating is included therebehind. The mirror is spectrally nonselective with elemental semiconductor optical thicknesses of about 275 to 2400 angstroms on the front substrate surface. Spectrally selective mirrors are provided by adding an interference coating to the elemental semiconductor layer coating, preferably of a dielectric such as silicon dioxide or silicon nitride, on either the front or rear substrate surface, or by using a thicker, single elemental semiconductor layer. Instead of an absorbing coating behind the mirror, additional elemental semiconductor and dielectric thin layers may be included to reduce secondary reflections. The method includes coating the thin elemental semiconductor layer on flat glass and heating to harden the layer and make it more scratch resistant, or heating and bending the glass without destroying the reflective properties of the mirror. The thin interference layer, secondary reflection reducing layers, and/or light absorbing coating may be coated before or after heating and bending.
REFERENCES:
patent: 2427689 (1947-09-01), Osterberg et al.
patent: 2478817 (1949-08-01), Gaiser
patent: 2519722 (1950-08-01), Turner
patent: 2590906 (1952-04-01), Tripp
patent: 2715352 (1955-08-01), Jobe
patent: 2750832 (1956-06-01), Morgan
patent: 2999034 (1961-09-01), Heidenhain
patent: 3412575 (1968-11-01), Feldman et al.
patent: 3556640 (1971-01-01), Austin
patent: 3559090 (1971-01-01), Refermat et al.
patent: 3652318 (1972-03-01), Heins
patent: 3671286 (1972-06-01), Fischell
patent: 3679291 (1972-07-01), Apfel et al.
patent: 3826728 (1974-07-01), Chambers et al.
patent: 3834793 (1974-09-01), McConnell et al.
patent: 3925182 (1975-12-01), Carmichael et al.
patent: 3926508 (1975-12-01), Harmsen et al.
patent: 3934061 (1976-01-01), Keck et al.
patent: 4048039 (1977-09-01), Daxinger
patent: 4144684 (1979-03-01), Kirkbride et al.
patent: 4320155 (1982-03-01), Gillery
patent: 4322130 (1982-03-01), Ito et al.
patent: 4388344 (1983-06-01), Shuskus et al.
patent: 4444467 (1984-04-01), Shuskus et al.
patent: 4490227 (1984-12-01), Bitter
patent: 4490228 (1984-12-01), Bodin et al.
patent: 4545646 (1985-10-01), Chern et al.
patent: 4627732 (1986-12-01), Braun et al.
patent: 4673248 (1987-06-01), Taguchi et al.
patent: 4715879 (1987-12-01), Schmitte et al.
patent: 4805989 (1989-02-01), Nakajima
patent: 4857094 (1989-08-01), Groth et al.
patent: 4921331 (1990-05-01), Nakajima et al.
patent: 4955705 (1990-09-01), Nakajima et al.
patent: 5007710 (1991-04-01), Nakajima et al.
patent: 5171414 (1992-12-01), Amberger et al.
patent: 5179471 (1993-01-01), Caskey et al.
U.S. Patent Application Ser. No. 07/603,568 filed Oct. 25, 1990 invented by Gregory T. Caskey, Niall R. Lynam and Rodney S. Arendsen entitled Spectrally Selective Mirror and Method for Making Same, assigned to the same assignee as the present application.
"Blue Mirror" vehicular rearview mirror element on sale in the United States for more than one year by Donnelly Corporation, Holland, Michigan, illustrated and described in attached Appendix A.
Caskey Gregory T.
Hichwa Bryant P.
Lynam Niall R.
Donnelly Corporation
Shafer Ricky D.
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