Patent
Fresnel lens combination
TLDR
In this article, a focusing unit includes a Fresnel lens combination, where the Fresnel lenses are oriented to reduce shadowing losses, which is a scattering of light from reflection at the facet walls that separate adjacent Fresnel zones on a given lens.Abstract:
A focusing unit includes a Fresnel lens combination, where the Fresnel lenses are oriented to reduce shadowing losses. Shadowing is a scattering of light from reflection at the facet walls that separate adjacent Fresnel zones on a given Fresnel lens. Two substantially adjacent Fresnel lenses make up the focusing unit, which can be used as a condenser that collects light from a source in a projection system. Both Fresnel lenses have non-faceted sides that face the light source. The first Fresnel lens collimates the light from the source. The second Fresnel lens receives the collimated beam, with a range of incident angles determined by the spatial extent of the source. Components such as reflective polarizers and anti-reflection coatings can be used between the Fresnel lenses and can be applied to the non-faceted side of the second Fresnel lens.read more
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Patent
Collimation lens system for LED
TL;DR: In this article, a collimation lens system for converging the light from an LED into a light beam, including a central lens aligned along the optical axis of the LED, the central lens including an aspheric collimation plano convex lens having a planar entrance surface and an as pheric exit surface, was presented.
Patent
Led source with hollow collection lens
TL;DR: In this article, a light source, including an LED emitter and a meniscus lens having a hollow cavity in which the emitter is disposed, is presented. And the cavity of the lens is filled with air, such as terrestrial atmosphere, inert gas, or vacuum.
Patent
Integrating light source module
TL;DR: In this article, a light source module is provided comprising an emitter having at least one light emitting surface and an at least partially hollow integrating optic mounted over the emitting surface; where the index of refraction within the hollowed area is less then the indices of the subsequent medium along the optical path.
Patent
Optical projection subsystem
Patrick R. Destain,Jennifer L. Grace,John E. Duncan,Tomasz A. Pol,William E. Phillips,Michael W. O'keefe,Alexander Glinski,Stephen J. Willett +7 more
TL;DR: A projection subsystem includes a light engine that provides a collection lens, a collimator and at least one solid state light emitter as mentioned in this paper, and a projection lens assembly receives the image and provides a projection beam having a luminous flux level.
Patent
Led illumination system with polarization recycling
TL;DR: In this article, the non-orthogonal shape of the polarizing filter is selected according to the pattern of light on the light source front surface, which is a direct component of the polarized image.
References
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Patent
High efficiency non-imaging optics
TL;DR: In this paper, a highly efficient optical device comprises two opposing active non-spherical optical surfaces defined by a two-dimensional representation that is symmetrically extended to provide a three-dimensional device.
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Patent
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TL;DR: In this paper, a compound parabolic concentrator (CPC) is mounted under a first and second optical concentrating fresnel lenses that concentrates the intensity of sunlight, then the focused sunlight is further concentrated twenty times by the third optical concentrator CPC.
Patent
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