Optical: systems and elements – Projection screen
Reexamination Certificate
2006-06-06
2006-06-06
Perkey, W. B. (Department: 2851)
Optical: systems and elements
Projection screen
C359S454000, C359S459000, C353S084000, C385S131000
Reexamination Certificate
active
07057809
ABSTRACT:
A clear image unaffected by the brightness of the projection environment. The projection screen according to the present invention is a projection screen for projecting thereupon narrow-band tricolor wavelength band light to display an image, and comprises an optical thin film (3) which has high reflection properties regarding the narrow-band tricolor wavelength band light, and has high transmission properties regarding at least visible wavelength band light other than the wavelength band light, on a screen base (2). With the projection screen according to the present invention configured as above, the optical thin film (3) serves as a so-called band filter. That is to say, the optical thin film (3) particularly reflects narrow-band tricolor wavelength band light and transmits light of other wavelengths, thereby functioning as a narrow-band tricolor wavelength bandwidth filter acting to separate these.
REFERENCES:
patent: 4752116 (1988-06-01), Sekiguchi
patent: 5193015 (1993-03-01), Shanks
patent: 5715083 (1998-02-01), Takayama
patent: 197 47 597 (1998-08-01), None
patent: 60-140201 (1985-07-01), None
patent: 06-289491 (1994-10-01), None
patent: 63-147108 (1995-01-01), None
patent: 07-261274 (1995-10-01), None
patent: 07-270915 (1995-10-01), None
patent: 11-015079 (1999-01-01), None
patent: WO 96/21883 (1996-07-01), None
patent: WO 00/45220 (2000-08-01), None
Kakinuma Masayasu
Kubota Shigeo
Ohsako Junichi
Shimoda Kazuhito
Cruz Magda
Depke Robert J.
Perkey W. B.
Sony Corporation
Trexler Bushnell et al.
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