SELECTIVE REFLECTING
3 Assignments
0 Petitions
Accused Products
Abstract
Selective reflective optical apparatus includes a projection screen. The projection screen has structure constructed and arranged to selectively reflect only incident optical energy of a predetermined number of narrow bands of optical wavelength regions.
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Citations
39 Claims
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5. Apparatus comprising,
a projection screen, said projection screen having structure constructed and arranged to selectively reflect only incident optical energy of a predetermined number of narrow bands of optical wavelength region and to significantly attenuate reflection of incident optical energy in bands of optical wavelength regions outside the frequency ranges contained in said predetermined number of narrow bands, and wherein said projection screen comprises a polarizing layer for transmitting light polarized in a given direction and for absorbing light not polarized in said given direction.
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20. A light projection system comprising,
a source of polarized light characterized by polarization of light energy in a predetermined number of narrow frequency regions in a first direction and of light energy in the frequency regions between said narrow frequency regions in a second direction, a screen having a polarizer constructed and arranged so that light energy in said narrow frequency regions is reflected and in other frequency regions is at least partially absorbed.
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39. A projector comprising:
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a digital-micromirror-device structure for providing light in a predetermined number of narrow bands of optical wavelength regions, said light polarized in the same direction; and
a polarization recovery system.
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Specification