Moshe Oren

US Patent:

8403502, Mar 26, 2013

Filed:

Nov 18, 2008

Appl. No.:

12/273053

Inventors:

Moshe Oren - Beavercreek OH, US

Assignee:

Barco N.V. - Kortrijk

International Classification:

G03B 21/28

US Classification:

353 98, 353 71, 353 77, 353 78, 353 79, 353 99, 353119, 353122, 359449

Abstract:

A front-projection display system having a screen with improved brightness and/or resolution of an image displayed on outer portions thereof. The screen has a display surface that is generally a convex shape having a curvature of the display surface in the vertical direction of an image projected thereon that is less than a curvature of the display surface in the horizontal direction.

US Patent:

57241511, Mar 3, 1998

Filed:

Jul 30, 1996

Appl. No.:

8/688450

Inventors:

James Francis Ryley - Drexel Hill PA
Joseph Anthony Perrotto - Landenberg PA
Moshe Oren - Waltham MA
Ronald Jack Riegert - Newark DE

Assignee:

E.I. du Pont de Nemours and Company - Wilimingon DE

International Classification:

G01N 2100

US Classification:

356432

Abstract:

A waveguide sensing element has a substrate having an input opening adapted to house an input optical fiber and an output opening adapted to house an output optical fiber. The input optical fiber transmits electromagnetic radiation, and the output optical fiber emits the electromagnetic radiation. The waveguide sensing element also has a guiding layer disposed adjacent the substrate. The guiding layer has a beveled end face. The angle of the bevel is chosen so that the guiding layer selects only those modes within a given range--i. e. , high order modes. This increases the spectral absorption measurement sensitivity as compared to a waveguide sensing element which uses the complete mode spectrum. Such a highly sensitive waveguide sensing element has been found to be particularly useful as an internal reflection spectroscopic sensing element. Moreover, the waveguide sensing element of the present invention is particularly useful in a process environment, where the corrosive effects of chemicals make on-line spectral absorption measurements difficult.

US Patent:

47255650, Feb 16, 1988

Filed:

Jun 26, 1986

Appl. No.:

6/878728

Inventors:

Moshe Oren - Burlington MA
Francisco C. Prince - Campinas, BR

Assignee:

GTE Laboratories Incorporated - Waltham MA

International Classification:

H01L 21223

US Classification:

437168

Abstract:

Method of diffusing sulfur into gallium arsenide without degrading the surface of the gallium arsenide. A gallium arsenide wafer is placed in close proximity to a quantity of powdered gallium sulfide intermixed with powdered gallium arsenide. The assemblage is heated in an open-tube furnace in the presence of flowing nitrogen to vaporize sulfur while the gallium arsenide and gallium sulfide are in thermodynamic equilibrium whereby sulfur diffuses into the gallium arsenide wafer without eroding the surface.