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  • Rochester, NY
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Us Patents

Optical Devices For Guiding Illumination

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US Patent:
7593615, Sep 22, 2009
Filed:
Feb 10, 2006
Appl. No.:
11/351699
Inventors:
Stephen H. Chakmakjian - Honeoye Falls NY,
Donald J. Schertler - Rochester NY,
Tasso Sales - Rochester NY,
G. Michael Morris - Victor NY,
Assignee:
RPC Photonics, Inc. - Rochester NY
International Classification:
G02B 6/26
G02B 6/34
G02B 6/10
G02B 6/00
G02B 27/46
G02B 5/04
G02B 5/10
F21V 9/14
G01D 11/28
G02F 1/1335
G02F 1/1333
F21V 23/02
F21V 5/00
F21V 5/02
F21V 7/00
F21S 8/00
US Classification:
385146, 385 31, 385 36, 385 37, 385 39, 385 43, 385129, 385131, 385147, 362 19, 362 26, 362 31, 362 32, 362260, 362268, 362328, 362330, 362331, 362333, 362339, 362346, 362347, 349 15, 349 56, 349 61, 349 62, 349 65, 349 66, 349 70, 349 95, 349117, 349121, 349159, 359559, 359833, 359834, 359869
Abstract:
Optical devices for guiding illumination are provided each having a body of optical material with staircase or acutely angled ramp structures on its top surface for distributing light inputted from one end of the device from the front exit faces of such structures along certain angular orientations, while at least a substantial portion of the light is totally internally reflected within the body until distributed from such front exit faces. Optical devices are also provided each have a body of optical material having a bottom surface with acutely angled ramp structures and falling structures which alternate with each other, such that light is totally internally reflected within the device until reflected by such ramp structures along the bottom surface to exit the top surface of the device or transmitted through the ramp structures to an adjacent falling structure back into the device. Acutely angled ramp structures may be provided on both top and bottom surfaces of optical devices for distributing light along such top surface. Illumination apparatuses are also provided using such optical devices.

Illumination Devices

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US Patent:
7918583, Apr 5, 2011
Filed:
Aug 16, 2006
Appl. No.:
11/505110
Inventors:
Stephen H. Chakmakjian - Honeoye Falls NY,
Donald J. Schertler - Rochester NY,
Tasso Sales - Rochester NY,
G. Michael Morris - Victor NY,
Assignee:
RPC Photonics, Inc. - Rochester NY
International Classification:
F21V 11/00
US Classification:
362240, 362244, 362237, 362334, 362335
Abstract:
Lighting devices are provided for efficiently distributing light over an area to provided uniform illumination over a wide angle or other tailored illumination patterns. Each light device has at least one light source, at least one collimator for partially collimating light from the light source, and at least one diffuser for diffusing light from the collimator. The diffuser provides diffused light over an area from the diffuser having an intensity that is angularly dependent in accordance with the angular distribution intensity of light outputted from the collimator, so as to provide a predetermined illumination pattern from the device. The light sources and collimators may be provided in one or two-dimensional arrays, and a single diffuser may be formed on each collimator or the diffuser may be along a plate spaced from the collimators.

Optical Devices For Guiding Illumination

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US Patent:
8111968, Feb 7, 2012
Filed:
Jul 27, 2009
Appl. No.:
12/460964
Inventors:
Stephen H. Chakmakjian - Honeoye Falls NY,
Donald J. Schertler - Rochester NY,
Tasso Sales - Rochester NY,
G. Michael Morris - Victor NY,
Assignee:
RPC Photonics, Inc. - Rochester NY
International Classification:
G02B 6/10
G02B 6/34
G02B 6/00
G02B 27/46
G02B 5/04
G02F 1/295
G02F 1/1333
G02F 1/1335
G01D 11/28
F21V 23/02
F21V 17/02
F21S 8/00
US Classification:
385146, 385 6, 385 37, 385129, 385131, 385147, 349 56, 349 61, 349 70, 349 95, 349121, 359559, 359833, 362 26, 362260, 362268, 362328, 362347
Abstract:
Optical devices for guiding illumination are provided each having a body of optical material with staircase or acutely angled ramp structures on its top surface for distributing light inputted from one end of the device from the front exit faces of such structures along certain angular orientations, while at least a substantial portion of the light is totally internally reflected within the body until distributed from such front exit faces. Optical devices are also provided each have a body of optical material having a bottom surface with acutely angled ramp structures and falling structures which alternate with each other, such that light is totally internally reflected within the device until reflected by such ramp structures along the bottom surface to exit the top surface of the device or transmitted through the ramp structures to an adjacent falling structure back into the device. Acutely angled ramp structures may be provided on both top and bottom surfaces of optical devices for distributing light along such top surface. Illumination apparatuses are also provided using such optical devices.

Optical Devices For Guiding Illumination

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US Patent:
8369678, Feb 5, 2013
Filed:
Jul 27, 2009
Appl. No.:
12/460951
Inventors:
Stephen H. Chakmakjian - Honeoye Falls NY,
Donald J. Schertler - Rochester NY,
Tasso Sales - Rochester NY,
G. Michael Morris - Victor NY,
Assignee:
RPC Photonics, Inc. - Rochester NY
International Classification:
G02B 6/10
G02B 6/34
G02B 6/26
G02B 6/00
G02B 5/04
G02F 1/1335
G01D 11/28
F21V 5/00
F21V 5/02
F21V 7/00
US Classification:
385146, 385 36, 385 39, 385 43, 385129, 385147, 349 61, 349 62, 359833, 359834, 362 26, 362328, 362333, 362339, 362346
Abstract:
Optical devices for guiding illumination are provided each having a body of optical material with staircase or acutely angled ramp structures on its top surface for distributing light inputted from one end of the device from the front exit faces of such structures along certain angular orientations, while at least a substantial portion of the light is totally internally reflected within the body until distributed from such front exit faces. Optical devices are also provided each have a body of optical material having a bottom surface with acutely angled ramp structures and falling structures which alternate with each other, such that light is totally internally reflected within the device until reflected by such ramp structures along the bottom surface to exit the top surface of the device or transmitted through the ramp structures to an adjacent falling structure back into the device. Acutely angled ramp structures may be provided on both top and bottom surfaces of optical devices for distributing light along such top surface. Illumination apparatuses are also provided using such optical devices.

Microlens Arrays Having High Focusing Efficiency

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US Patent:
2002003, Mar 21, 2002
Filed:
Jul 30, 2001
Appl. No.:
09/918257
Inventors:
Geoffrey Gretton - Honeoye Falls NY,
G. Morris - Victor NY,
Tasso Sales - Rochester NY,
International Classification:
G02B027/10
US Classification:
359/619000, 359/620000, 359/621000
Abstract:
Microlens arrays () having high focusing efficiencies are provided. The high focusing efficiencies are achieved by accurately producing the individual microlenses making up the array at high fill factors. Arrays of positive microlenses are produced by forming a master having a concave surface-relief pattern () in a positive photoresist () using direct laser writing. Through this approach, the problems associated with the convolution of a finite laser beam with a desired profile for a microlens are overcome. The microlens arrays of the invention have focusing efficiencies of at least 75%.

Structured Screens For Controlled Spreading Of Light

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US Patent:
2002003, Mar 21, 2002
Filed:
Jul 30, 2001
Appl. No.:
09/918408
Inventors:
G. Morris - Victor NY,
Tasso Sales - Rochester NY,
Assignee:
Rochester Photonics Corporation
International Classification:
G02B005/02
US Classification:
430/321000, 430/945000, 359/599000, 359/707000
Abstract:
Structured screens for the controlled spreading, diffusion, or scattering of an incident beam are provided. The screens are composed of microstructures () whose configurations and distribution on the surfaces of the screen are precisely determined. In certain embodiments, the configurations and/or their distribution is randomized. The structured screens can be used as diffusing screens or display screens.

High-Contrast Screen With Random Microlens Array

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US Patent:
2002014, Oct 10, 2002
Filed:
Feb 7, 2002
Appl. No.:
10/072014
Inventors:
Tasso Sales - Rochester NY,
International Classification:
G03B021/60
US Classification:
359/456000
Abstract:
Screens for use with image-forming illumination () are provided, as well as methods for producing such screens. The screens include an array of lenses (), a substrate, and a layer of light-absorbing material () in which apertures are formed using aperture-forming illumination () which passes through the lenses (). The optical properties of the lenses () and the thickness of the substrate are selected so as to maximize the light-blocking area of the layer of light-absorbing material () while allowing long-wavelength image-forming illumination () to pass through the apertures substantially unimpeded. The array of lenses can be an array of randomized, anamorphic microlenses.

Grid Polarizer With Suppressed Reflectivity

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US Patent:
2004012, Jul 1, 2004
Filed:
Dec 11, 2003
Appl. No.:
10/733955
Inventors:
Tasso Sales - Rochester NY,
International Classification:
G02B005/30
US Classification:
359/486000, 359/352000, 359/576000
Abstract:
Disclosed is a grid polarizer comprising a substrate; and a plurality of stacked metal and dielectric layers, having a width w, disposed on the substrate and forming a parallel grid of stacked layers. The stacked layers are spaced apart to form a repetition space between the stacked layers, such that no diffraction orders are allowed to propagate except the zero order. The grid polarizer that is capable of transmitting substantially all illumination of a given polarization while suppressing at least of portion of the illumination reflected due to an orthogonal polarization component.
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