GLENN BAKER, MFT
Social Work at Mulholland Hwy, Calabasas, CA

5414600, May 9, 1995

Jul 30, 1993

8/099953

Karlheinz Strobl - Los Angeles CA
Glenn S. Baker - Los Angeles CA
Douglas M. Brenner - Los Angeles CA
Robert L. Piccioni - Thousand Oaks CA

Cogent Light Technologies, Inc. - Santa Clarita CA

F21V 709

362 32

An off-axis optical system for collecting and condensing electromagnetic radiation utilizes an ellipsoidal reflector or a portion thereof configured so that the effects of magnification and optical aberrations (caused by the off-axis arrangement and an aspherical source envelope) are minimized. This is accomplished by the utilization of a specially designed ellipsoidal reflector having primary and secondary focal points along the major axis of the reflector or an effective reflecting portion thereof defined as that portion which is both illuminated by the source and subtended by the acceptance cone of the target. In the preferred embodiment, a single ellipsoidal reflector is configured with its major axis both non coincident with its geometric optical axis and with the optical axis of the target at an angle greater than zero degrees so as to reduce substantially the distance at which a focused image is formed and to achieve an average magnification near unity thereby maintaining the brightness of the source at the target. The radiant flux at the location of the target can be increased by incorporating a retro-reflector of toroidal or spherical design. In a second embodiment, the components forming the optical system of the present invention are arranged in a self-contained nautilus-shaped housing wherein the inner surface of the housing preferably comprises a reflector encompassing the retro-reflector, an effective ellipsoidal reflecting portion and a window through which the image is projected onto the target.

6186648, Feb 13, 2001

Oct 13, 1998

9/170036

Glenn Baker - Los Angeles CA
Karlheinz Strobl - Southbridge MA
Douglas M. Brenner - Los Angeles CA
Robert L. Piccioni - Thousand Oak CA
Robert Fischer - Westlake Village CA
Michael Thomas - Brookline MA

Cogent Light Technologies, Inc. - Santa Clarita CA

F21V 704, F21V 800

362298

An electromagnetic radiation source, such as an arc lamp, is located at a point displaced from the optical axis of a concave toroidal reflecting surface. The concave primary reflector focuses the radiation from the source at an off-axis image point that is displaced from the optical axis. The use of a toroidal reflecting surface enhances the collection efficiency into a small target, such as an optical fiber, relative to a spherical reflecting surface by substantially reducing aberrations caused by the off-axis geometry. A second concave reflector is placed opposite to the first reflector to enhance further the total flux collected by a small target. In accordance with one embodiment, the present invention is directed to devices in which the square of the off-axis distance divided by the radius of curvature is equal to or less than the extent of the source of electromagnetic radiation (y. sub. sup. 2 /r. ltoreq. s. sub. 0).

5275594, Jan 4, 1994

Nov 9, 1990

7/611994

Glenn S. Baker - Los Angeles CA
Michael G. Dumont - Stratham NH
Michael Madden - Ashby MA
Norman E. Farr - North Andover MA

C. R. Bard, Inc. - Murray Hill NJ

A61N 506

606 12

An angioplasty system and method for identification and laser ablation of atherosclerotic plaque at a target site in a blood vessel includes fluorescence analysis for identification of noncalcified plaque and calcium photoemission analysis for identification of calcified plaque. Calcified plaque is identified by time domain analysis of calcium photoemission. A high energy pulsed ultraviolet laser can be used for stimulation of fluorescence and for stimulation of calcium photoemission. The system is capable of distinguishing between calcium photoemission and a defective condition of optical fibers that are used to deliver laser energy to the target site. In an another embodiment of the angioplasty system, calcium photoemission is identified during a nonablative initial portion of the laser ablation pulse. When calcium photoemission is not identified, the laser ablation pulse is terminated during the initial nonablative portion thereof.

5836667, Nov 17, 1998

Jun 7, 1995

8/488188

Glenn Baker - Los Angeles CA
Karlheinz Strobl - Los Angeles CA
Douglas Brenner - Los Angeles CA
Robert L. Piccioni - Thousand Oak CA
Robert Fischer - Westlake Village CA
Michael Thomas - Brookline MA

Cogent Light Technologies, Inc. - Santa Clarita CA

F21V 704

362 32

An electromagnetic radiation source, such as an arc lamp, is located at a point displaced from the optical axis of a concave toroidal reflecting surface. The concave primary reflector focuses the radiation from the source at an off-axis image point that is displaced from the optical axis. The use of a toroidal reflecting surface enhances the collection efficiency into a small target, such as an optical fiber, relative to a spherical reflecting surface by substantially reducing aberrations caused by the off-axis geometry. A second concave reflector is placed opposite to the first reflector to enhance further the total flux collected by a small target.

5430634, Jul 4, 1995

Aug 3, 1992

7/924198

Glenn Baker - Los Angeles CA
Karlheinz Strobl - Los Angeles CA
Douglas Brenner - Los Angeles CA
Robert L. Piccioni - Thousand Oak CA
Robert Fischer - Westlake Village CA
Michael Thomas - Brookline MA

Cogent Light Technologies, Inc. - Santa Clarita CA

F21V 800, F21V 704

362 32

An electromagnetic radiation source, such as an arc lamp, is located at a point displaced from the optical axis of a concave toroidal reflecting surface. The concave primary reflector focuses the radiation from the source at an off-axis image point that is displaced from the optical axis. The use of a toroidal reflecting surface enhances the collection efficiency into a small target, such as an optical fiber, relative to a spherical reflecting surface by substantially reducing aberrations caused by the off-axis geometry. A second concave reflector is placed opposite to the first reflector to enhance further the total flux collected by a small target.