 Coaxial dual primary heat exchanger |
| Basically the present invention in it's most simple form or embodiment is directed to a heat ... |
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| Illumination panel |
| The present invention was completed under this background, and a primary object of the present ... |
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| Necktie with a flat flashlight concealed therein |
| OF THE PREFERRED EMBODIMENT Referring now more specifically to FIG. 1, therein is disclosed a ... |
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| Food oven and smoker device |
| OF THE PREFERRED EMBODIMENT Referring to FIG. 1, there is shown the improved food oven apparatus 10... |
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| Heat treatment of food with flow-dependent control |
| According to the invention this problem is solved in that a disturbance is forced on or an obstacle ... |
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| Oven with excess steam treatment device |
| To achieve these and other objects the invention consists in an oven for cooking foodstuffs ... |
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| Cooking apparatus |
| An object of the present invention is to provide an alternate solution to the above problem in the ... |
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| Convection meat cooker |
| These and other objects of the invention are provided in a convection meat cooker characterized by ... |
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| Rotary cooking apparatus |
| The rotary cooking apparatus of this invention is typically used with a heat source to cook food in ... |
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| Combination oven with three-stage water atomizer |
| The present invention provides a combination steam and convection oven for preparing food having a ... |
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High efficiency non-imaging optics
| Details |
Inventors: Minano, Juan C.; Benitez, Pablo; Gonzalez, Juan C.; Falicoff, Waqidi; Caulfield, H. J.;
Assignee: Light Prescriptions Innovators, LLC. (Irvine, CA)
Primary Examiner: Spector; David N.
Assistant Examiner:
Attorney, Agent or Firm: Law Offices of James D. McFarland
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. A focal area, spaced apart from the optical surface and non-contiguous therewith, is defined by the two opposing active optical surfaces. The active optical surfaces each have a continuous second derivative, and the optical surfaces are defined by a polynomial with an order of at least about twenty. The optical device may comprise a transparent dielectric core, and the optical surfaces may be formed on the core. A receiver may be situated at the focal area to provide a concentrator. An extended light source such as an LED may be situated at the focal area, to provide a collimator. Faceted embodiments can provide a low aspect optical device. In some embodiments a diffuser may be used to transform incident radiation into a predetermined shape. |
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DETAILED DESCRIPTION In order to overcome the limitations of the prior art, the present invention provides an optical device that is highly efficient and a method of manufacturing the optical device in a variety of forms, such as optical devices that transform a first radiation distribution that is non-uniform into a second radiation distribution that is substantially uniform.
A method of manufacturing an optical device that has two opposing active optical surfaces that convert a first distribution of an input radiation to a second distribution of output radiation includes providing a two-dimensional mathematical model that describes the first distribution of radiation as an input bundle of edge rays and the second distribution of radiation as an output bundle of edge rays.
The input and output edge ray bundles are each represented in a phase-space representation in terms of the position of each ray in space and its associated optical cosine of propagation, where the locus of the edge rays in the phase-space for the input bundle defines a closed boundary of a first planar shape, and the locus of the edge rays in the phase-space for the output bundle defines a closed boundary of a second planar shape, wherein these two planar shapes have a substantially equal area.
The two-dimensional shape of the outer caustic is approximated for the input and output radiation distribution ray bundles, where the outer caustic is defined such that it does not touch any of the active optical surfaces.
A two-dimensional representation of the active optical surfaces is defined responsive to the boundary conditions of the phase-space representations and the outer caustics, including defining a focal area spaced apart from, and noncontiguous with, the optical surfaces, the active optical surfaces each having a continuous second derivative.
The optical surfaces are formed so that the theoretical transmission efficiency of the first input radiation distribution to the second input radiation distribution, neglecting attenuation losses in the processing path, is greater than about 80% of the maximum transmission efficiency
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Lighting 
