Selective reflecting
First Claim
1. A method for making a projection screen, comprising:
- depositing onto a diffusing substrate having a contour layers of high index-of-refraction (n) dielectric material and low n material so that the layers generally follow the contour of the diffusing substrate to provide a diffusing multilayer interference structure;
depositing, on another substrate, a polarizing coating to provide a polarizer for transmitting light with one linear polarization and for absorbing light with a second linear polarization;
applying, on at least one of the diffusing multilayer interference structure and a first surface of a matte diffuser, a first layer of uncured adhesive;
curing the first layer of uncured adhesive to provide a first layer of cured adhesive;
applying, on a second surface of the matte diffuser, a second layer of uncured adhesive;
curing the second layer of uncured adhesive to provide a second layer of cured adhesive; and
laminating the diffusing multilayer interference structure, the matte diffuser, the polarizer, and a front diffuser, the front diffuser characterized by a diffusion pattern in which lobes are non-perpendicular to the front diffuser.
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Accused Products
Abstract
A projection screen that includes a multilayer, multiband, single stack device that selectively reflects light with wavelengths in plurality of narrow wavelength bands, and methods for making the screen. The multilayer, multiband, single stack device may be an etalon device. The multiple layers may be deposited on a diffusing substrate. The projection screen may also include a polarizer that coacts with a projector. The projector polarizes the projected light in the narrow wavelength bands into the same polarity and the screen reflects the light with the same polarization and does not reflect light of another polarization. The polarizer may include substrate with a thin polarizing coating. The screen may include a matte surfaced diffuser.
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Citations
75 Claims
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1. A method for making a projection screen, comprising:
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depositing onto a diffusing substrate having a contour layers of high index-of-refraction (n) dielectric material and low n material so that the layers generally follow the contour of the diffusing substrate to provide a diffusing multilayer interference structure;
depositing, on another substrate, a polarizing coating to provide a polarizer for transmitting light with one linear polarization and for absorbing light with a second linear polarization;
applying, on at least one of the diffusing multilayer interference structure and a first surface of a matte diffuser, a first layer of uncured adhesive;
curing the first layer of uncured adhesive to provide a first layer of cured adhesive;
applying, on a second surface of the matte diffuser, a second layer of uncured adhesive;
curing the second layer of uncured adhesive to provide a second layer of cured adhesive; and
laminating the diffusing multilayer interference structure, the matte diffuser, the polarizer, and a front diffuser, the front diffuser characterized by a diffusion pattern in which lobes are non-perpendicular to the front diffuser. - View Dependent Claims (2)
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3. An optical device, comprising:
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a first reflective layer;
a second reflective layer;
substantially continuous layers of dielectric material, each layer consisting essentially of a material having a different index-of-refraction (n) than the material of an adjacent layer, the layers disposed between the first reflective layer and the second reflective layer, constructed and arranged so that an optical output of the optical device includes substantially more light with wavelengths in a plurality of narrow wavelength bands than light with wavelengths not in the plurality of wavelength bands. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11)
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12. A diffusing optical device, comprising:
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a light diffusing substrate with an irregular surface;
layers of dielectric material disposed on the substrate, the layers generally following a contour of the irregular surface of the diffusing substrate so that the surfaces of the layers are irregular. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. An optical device, comprising;
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a first irregular, diffusing, reflective surface;
a second reflective surface, separated from the irregular diffusing surface by a gap wherein the irregular diffusing reflective surface, the second reflective surface, and the gap are constructed and arranged so that the reflectance of light with wavelengths in a narrow of wavelength band is significantly greater than the reflectance of light with wavelengths not in the wavelength band. - View Dependent Claims (20, 21, 22, 23)
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24. A projection system, comprising:
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a multi-layer projection screen, comprising, a polarizing coating in the range of 1 to 10 micrometers thick, deposited on a substrate, constructed and arranged to selectively absorb light of one polarization and to transmit light of other polarizations. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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31. A projection screen constructed and arranged so that the reflectance of light with wavelengths in a plurality of pre-determined narrow non-harmonic wavelength bands is substantially greater than the reflectance of light with wavelengths not in the plurality of wavelength bands, the projection screen comprising a selective reflecting device, the selective reflecting device comprising:
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a substrate; and
a stack of consecutive layers of dielectric material, each layer consisting essentially of a material having a different index-of-refraction (n) than the material of an adjacent layer, the layers disposed on the substrate, constructed and arranged so that the reflectance of light with wavelengths plurality of narrow non-harmonic wavelength bands is substantially greater than the reflectance of light with wavelengths not in the plurality of wavelength bands. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A multi-layer projection screen, comprising:
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a selective reflecting device for selectively reflecting light so that the reflectance of light with wavelengths in a pre-determined non-harmonic plurality of wavelength bands is substantially greater than light with wavelengths not in the pre-determined non-harmonic plurality of wavelength bands; and
a matte surfaced diffuser for diffusing the light with the wavelengths in the pre-determined plurality of wavelength bands. - View Dependent Claims (46, 47, 48, 49)
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50. A method for manufacturing a multi-layer projection screen, comprising:
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applying uncured adhesive to a first layer of the projection screen;
curing the adhesive; and
laminating a second layer of the projection screen to the first layer. - View Dependent Claims (51, 52, 53, 54, 55, 56)
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- 57. A substantially planar projection screen comprising an optical device constructed and arranged to cause the projection screen to have a light reflectance pattern that is characterized by a lobe with an axis that is not perpendicular to the plane of the projection screen.
- 60. A projection screen constructed and arranged to receive input light at a location on the screen, the input light being received at an angle relative to a surface of the screen at the location, the projection screen further constructed and arranged to reflect light from the location along an array of output directions that are distributed about an output axis, the output axis being at an angle relative to the surface that is different from the angle than would have resulted if the surface were a simple plane reflector.
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63. A method for making projection screen, comprising:
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depositing onto a first substrate layers of dielectric material, each layer consisting essentially of a material having a different index-of-refraction (n) than the material of an adjacent layer;
depositing onto the layers of dielectric material a first reflective layer. - View Dependent Claims (64, 65, 66, 67, 68, 69, 70, 71)
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72. A method comprising
at a projection screen receiving projected light and ambient light, processing the light, and preferentially reflecting portions of the light that are within at least two narrow spectral bands relative to reflection of light that is not within the narrow spectral bands, the processing occurring within consecutive layers of higher and lower index-of-refraction materials.
Specification