Patents by Inventor Keith B. Kahen
Keith B. Kahen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 6950454Abstract: An electronic imaging system for providing a viewable color image from an image data stream, including: a plurality of different colored laser light sources arranged in an at least one array with each such colored laser light source including a vertical cavity design; at least one area light valve for receiving the laser light and producing the viewable color image from the image data stream; and a projection lens for projecting the viewable color image onto a target plane.Type: GrantFiled: March 24, 2003Date of Patent: September 27, 2005Assignee: Eastman Kodak CompanyInventors: Brian E. Kruschwitz, Keith B. Kahen, Andrew F. Kurtz, John P. Spoonhower
-
Patent number: 6947459Abstract: An organic vertical cavity laser light producing device (10) comprises a substrate (20). A plurality of laser emitters (200) emits laser light in a direction orthogonal to the substrate. Each laser emitter within the plurality of laser emitters has a first lateral mode structure in a first axis orthogonal to the laser light direction and has a second lateral mode structure in a second axis orthogonal to both the laser light direction and the first axis. Each laser emitter comprises a first mirror provided on a top surface of the substrate (20) and is reflective to light over a predetermined range of wavelengths. An organic active region (40) produces laser light (350). A second mirror is provided above the organic active region and is reflective to light over a predetermined range of wavelengths. A pumping means excites the plurality of laser emitters.Type: GrantFiled: November 25, 2002Date of Patent: September 20, 2005Assignee: Eastman Kodak CompanyInventors: Andrew F. Kurtz, Marek W. Kowarz, Brian E. Kruschwitz, Keith B. Kahen
-
Patent number: 6928095Abstract: An organic vertical cavity laser array device for producing multimode laser output includes a substrate; a bottom dielectric stack reflective to light over a predetermined range of wavelengths, being disposed over the substrate; and an active region for producing laser light. A top dielectric stack is spaced from the bottom dielectric stack and reflective to light over a predetermined range of wavelengths. The active region includes one or more periodic gain region(s) and spacer layers disposed on either side of the periodic gain region(s). The periodic gain region(s) is aligned with the antinodes of the device's standing wave electromagnetic field. The device includes array of spaced laser pixels which have higher reflectance than the interpixel regions. The spaced laser pixels have different sizes and the spacings between pixels having the same or different lengths to cause the output of the vertical cavity laser array device to produce multimode laser output.Type: GrantFiled: July 18, 2003Date of Patent: August 9, 2005Assignee: Eastman Kodak CompanyInventor: Keith B. Kahen
-
Patent number: 6879306Abstract: A display system for providing a user viewable visible color image includes a display for receiving color laser light so that the display, in response to color laser light, produces a viewable visible colored image; a plurality of different color laser light sources arranged in an array with each such laser light source including: a first dielectric stack for receiving and transmitting pump-beam light and being reflective to laser light over a predetermined range of wavelengths; an organic active region for receiving transmitted pump-beam light from the first dielectric stack; and a second dielectric stack for reflecting transmitted pump-beam light and laser light from the organic active region back into the organic active region. The display system projects color laser light from the array onto the display in a pattern to cause a visual image to be produced by the display.Type: GrantFiled: May 2, 2002Date of Patent: April 12, 2005Assignee: Eastman Kodak CompanyInventors: John P. Spoonhower, Keith B. Kahen, John A. Lebens
-
Patent number: 6879618Abstract: A laser emitting apparatus includes a substrate having on one side an incoherent light-emitting device having a light-emitting layer wherein an electric field is applied across the light-emitting layer to produce light which is transmitted out of the incoherent light-emitting device through an optically transparent layer into a vertical laser cavity structure disposed to receive light transmitted from the incoherent light-emitting device and produce laser light.Type: GrantFiled: June 24, 2003Date of Patent: April 12, 2005Assignee: Eastman Kodak CompanyInventors: Ronald S. Cok, Keith B. Kahen, John A. Lebens, John P. Spoonhower
-
Patent number: 6876684Abstract: An organic vertical cavity laser light producing device includes a bottom dielectric stack reflective to light over a predetermined range of wavelengths; an organic active region for producing laser light, and having an organic active region including emissive material; and a top dielectric stack spaced from the bottom dielectric stack and reflective to light over a predetermined range of wavelengths. Pump-beam light is transmitted and introduced into the organic active region through at least one of the dielectric stacks. The organic active region includes one or more periodic gain region(s) and organic spacer layers disposed on either side of the periodic gain region(s) and arranged so that the periodic gain region(s) is aligned with the antinodes of the device's standing wave electromagnetic field, and wherein the spacer layers are substantially transparent to the laser light.Type: GrantFiled: October 11, 2002Date of Patent: April 5, 2005Assignee: Eastman Kodak CompanyInventors: Keith B. Kahen, J. Ramon Vargas, Denis Y. Kondakov, Christopher T. Brown, Lelia Cosimbescu, Viktor Jarikov
-
Patent number: 6869185Abstract: A display system for providing a user viewable visible image, includes a view screen for receiving organic laser light and having a diffusing optical element so that the view screen, in response to organic laser light, produces a viewable visible image, wherein the diffusing optical element includes a viewing angle greater than 160° in a first viewing direction and greater than 100° in a second viewing direction orthogonal to the first direction; one or more organic laser light sources arranged in an array with each such laser light source including a vertical cavity design and means for projecting and modulating the intensity of the organic laser light from the array onto the view screen in a pattern to cause a visual image to be produced by the view screen; and means associated with the view screen for reducing speckle in the organic laser light.Type: GrantFiled: October 16, 2002Date of Patent: March 22, 2005Assignee: Eastman Kodak CompanyInventors: Cheryl J. Kaminsky, Robert P. Bourdelais, Keith B. Kahen, John A. Lebens, John P. Spoonhower
-
Patent number: 6870868Abstract: An organic vertical cavity laser device includes a substrate; a bottom dielectric stack reflective to light over a predetermined range of wavelengths and being disposed over the substrate, and an organic active region for producing laser light. The device also includes a top dielectric stack spaced from the bottom dielectric stack and reflective to light over a predetermined range of wavelengths, and a thermally conductive transparent layer disposed between the bottom dielectric stack and the organic active region or between the top dielectric stack and the organic active region or both.Type: GrantFiled: February 18, 2003Date of Patent: March 22, 2005Assignee: Eastman Kodak CompanyInventors: Keith B. Kahen, John A. Lebens
-
Patent number: 6836495Abstract: A vertical cavity laser light producing device includes a substrate; a bottom dielectric stack reflective to light over a predetermined range of wavelengths; and an active region for producing laser light. The device also includes a top dielectric stack spaced from the bottom dielectric stack and reflective to light over a predetermined range of wavelengths; and the active region includes one or more periodic organic gain region(s) and inorganic spacer layers disposed on either side of the periodic organic gain region(s) and arranged so that the periodic organic gain region(s) is aligned with the antinodes of the device's standing wave electromagnetic field.Type: GrantFiled: May 7, 2003Date of Patent: December 28, 2004Assignee: Eastman Kodak CompanyInventor: Keith B. Kahen
-
Publication number: 20040223525Abstract: A vertical cavity laser light producing device includes a substrate; a bottom dielectric stack reflective to light over a predetermined range of wavelengths; and an active region for producing laser light. The device also includes a top dielectric stack spaced from the bottom dielectric stack and reflective to light over a predetermined range of wavelengths; and the active region includes one or more periodic organic gain region(s) and inorganic spacer layers disposed on either side of the periodic organic gain region(s) and arranged so that the periodic organic gain region(s) is aligned with the antinodes of the device's standing wave electromagnetic field.Type: ApplicationFiled: May 7, 2003Publication date: November 11, 2004Applicant: Eastman Kodak CompanyInventor: Keith B. Kahen
-
Publication number: 20040190573Abstract: An electronic imaging system for providing a view able color image from an image data stream, including: a plurality of different colored laser light sources arranged in an at least one array with each such colored laser light source including a vertical cavity design; at least one area light valve for receiving the laser light and producing the view able color image from the image data stream; and a projection lens for projecting the view able color image onto a target plane.Type: ApplicationFiled: March 24, 2003Publication date: September 30, 2004Applicant: Eastman Kodak CompanyInventors: Brian E. Kruschwitz, Keith B. Kahen, Andrew F Kurtz, John P. Spoonhower
-
Patent number: 6790696Abstract: A method of making an organic vertical cavity laser array device includes providing a substrate and a first portion of a bottom dielectric stack reflective to light over a predetermined range of wavelengths and being disposed over the substrate; forming an etched region in the top surface of the first portion of the bottom dielectric stack to define an array of spaced laser pixels which have higher reflectance than the interpixel regions so that the array emits laser light; and forming a second portion of the bottom dielectric stack over the etched first portion. The method also includes forming an active region over the second portion of the bottom dielectric stack for producing laser light, and forming a top dielectric stack over the active region and spaced from the bottom dielectric stack and reflective to light over a predetermined range of wavelengths.Type: GrantFiled: June 30, 2003Date of Patent: September 14, 2004Assignee: Eastman Kodak CompanyInventor: Keith B. Kahen
-
Publication number: 20040161004Abstract: An organic vertical cavity laser device includes a substrate; a bottom dielectric stack reflective to light over a predetermined range of wavelengths and being disposed over the substrate, and an organic active region for producing laser light. The device also includes a top dielectric stack spaced from the bottom dielectric stack and reflective to light over a predetermined range of wavelengths, and a thermally conductive transparent layer disposed between the bottom dielectric stack and the organic active region or between the top dielectric stack and the organic active region or both.Type: ApplicationFiled: February 18, 2003Publication date: August 19, 2004Applicant: Eastman Kodak CompanyInventors: Keith B. Kahen, John A. Lebens
-
Publication number: 20040101008Abstract: An organic vertical cavity laser light producing device (10) comprises a substrate (20). A plurality of laser emitters (200) emits laser light in a direction orthogonal to the substrate. Each laser emitter within the plurality of laser emitters has a first lateral mode structure in a first axis orthogonal to the laser light direction and has a second lateral mode structure in a second axis orthogonal to both the laser light direction and the first axis. Each laser emitter comprises a first mirror provided on a top surface of the substrate (20) and is reflective to light over a predetermined range of wavelengths. An organic active region (40) produces laser light (350). A second mirror is provided above the organic active region and is reflective to light over a predetermined range of wavelengths. A pumping means excites the plurality of laser emitters.Type: ApplicationFiled: November 25, 2002Publication date: May 27, 2004Applicant: Eastman Kodak CompanyInventors: Andrew F. Kurtz, Marek W. Kowarz, Brian E. Kruschwitz, Keith B. Kahen
-
Publication number: 20040090599Abstract: An apparatus for providing modulated light, that includes: a VCSEL array for generating an illumination beam from a plurality of emissive elements within the VCSEL array; a linear array of electromechanical grating devices for modulating the illumination beam to provide a plurality of diffracted orders; an obstructing element for blocking at least one of the plurality of diffracted orders; and means for conditioning the illumination beam to provide a suitable aspect ratio for incidence onto the linear array of electromechanical grating devices and/or remove unwanted spatial content.Type: ApplicationFiled: October 16, 2002Publication date: May 13, 2004Applicant: Eastman Kodak CompanyInventors: Marek W. Kowarz, John A. Agostinelli, Keith B. Kahen
-
Patent number: 6728278Abstract: An organic vertical cavity phase-locked laser array device includes a substrate, a bottom dielectric stack reflective to light over a predetermined range of wavelengths, and an organic active region for producing laser light. The device also includes a top dielectric stack spaced from the bottom dielectric stack and reflective to light over a predetermined range of wavelengths, and a patterned reflectance modulator formed on a surface of the substrate to define an array of spaced laser pixels which have higher reflectance than the interpixel regions and causes the array to emit coherent phase-locked laser light.Type: GrantFiled: May 23, 2002Date of Patent: April 27, 2004Assignee: Eastman Kodak CompanyInventors: Keith B. Kahen, Lingadahalli G. Shantharama
-
Publication number: 20040076198Abstract: A system for mechanically tuning optical wavelengths emitted from an organic laser cavity device, that includes: a multi-layered film structure, wherein the multi-layered film structure is pumped by an incoherent source of photons; and a micro-electromechanical mirror assembly proximate to the multi-layered film structure, wherein the micro-electromechanical mirror assembly varies the cavity length of the organic laser cavity device.Type: ApplicationFiled: October 16, 2002Publication date: April 22, 2004Inventors: John P. Spoonhower, John A. Agostinelli, Brian E. Kruschwitz, Keith B. Kahen, John A. Lebens
-
Publication number: 20040076203Abstract: A display system for providing a user viewable visible image, includes a view screen for receiving organic laser light and having a diffusing optical element so that the view screen, in response to organic laser light, produces a viewable visible image, wherein the diffusing optical element includes a viewing angle greater than 160° in a first viewing direction and greater than 100° in a second viewing direction orthogonal to the first direction; one or more organic laser light sources arranged in an array with each such laser light source including a vertical cavity design and means for projecting and modulating the intensity of the organic laser light from the array onto the view screen in a pattern to cause a visual image to be produced by the view screen; and means associated with the view screen for reducing speckle in the organic laser light.Type: ApplicationFiled: October 16, 2002Publication date: April 22, 2004Applicant: Eastman Kodak CompanyInventors: Cheryl J. Kaminsky, Robert P. Bourdelais, Keith B. Kahen, John A. Lebens, John P. Spoonhower
-
Patent number: 6690697Abstract: A vertical cavity light-producing device which, in response to incident external light, produces quasi-laser light with an enlarged spectral linewidth selected to improve power conversion efficiency, including a substrate; a bottom dielectric stack reflective to light over a predetermined range of wavelengths; and an organic active region for producing quasi-laser light. The device also includes a top dielectric stack spaced from the bottom stack reflective to light over a predetermined range of wavelengths; the active region includes one or more periodic gain region(s) and organic spacer layers disposed on either side of the periodic gain region(s) arranged so that the periodic gain region(s) is aligned with the antinodes of the device's standing wave electromagnetic field; and the top or bottom dielectric stack being selected so that it's peak reflectance is less than 99% and the device's spectral linewidth is increased but produces an acceptable level of spontaneous emission.Type: GrantFiled: August 20, 2002Date of Patent: February 10, 2004Assignee: Eastman Kodak CompanyInventor: Keith B. Kahen
-
Patent number: 6687274Abstract: An organic vertical cavity phase-locked laser array device includes a bottom dielectric stack reflective to light over a predetermined range of wavelengths and an organic active region for producing laser light. The device also includes a top dielectric stack spaced from the bottom dielectric stack and reflective to light over a predetermined range of wavelengths, and an etched region formed in a surface of the bottom dielectric stack to define an array of spaced laser pixels which have higher reflectance than the interpixel regions so that the array emits coherent phase-locked laser light.Type: GrantFiled: February 4, 2002Date of Patent: February 3, 2004Assignee: Eastman Kodak CompanyInventor: Keith B. Kahen