Gilbert T Chan, Age 893140 Markscott Dr, Houston, TX 77082

7339741, Mar 4, 2008

Nov 14, 2006

11/599536

Yaujen Wang - Arcadia CA, US
Gilbert Y. Chan - Yorba Linda CA, US

Northrop Grumman Systems Corporation - Los Angeles CA

G92B 27/14
G02B 13/14
G08B 13/14

359629, 359356, 25033901

Systems and methods for providing a wide angle multi-color infrared (IR) optical system are disclosed. In one embodiment, a system is provided that comprises a negative lens configured to receive an incoming light beam scene over a wide FOV and a beam splitter configured to receive incoming light beam associated with the incoming light beam scene from the negative lens and to provide light beams of a first color to a first channel and to provide light beams of a second color to a second channel. The system further comprises a first positive lens assembly arranged to focus light beams of the first color received from the beam splitter on a first image detector, and a second positive lens assembly arranged to focus light beams of the second color received from the beam splitter on a second image detector.

5862726, Jan 26, 1999

Feb 2, 1995

8/382432

Gilbert Y. Chan - Diamond Bar CA
Kenneth G. Preston - Foxboro MA

Aerojet-General Corporation - Sacramento CA

B23B 100
B23B 540

82 111

The fabrication of an off axis three-mirror telescope on only two substrates allowing two of mirrors to be formed on a common substrate, such as by means of diamond turning. The common substrate configuration is made possible by utilizing a common vertex for both the primary and tertiary mirrors so that alignment subsequent to fabrication requires placement of only two elements. In addition, all three mirrors in this invention share a common optical axis enabling an extremely simple mounting and housing design. The present invention is applicable for use in electro-optical imaging sensors operating from visible wavelengths to long infrared wavelengths. A telescope is formed by the assembly of three off-axis mirrors, including a primary mirror, a secondary mirror and a tertiary mirror. In addition, the primary and tertiary mirrors also share a common vertex enabling the fabrication of two mirror surfaces on a common substrate with a diamond turning process, thus eliminating the need to align the primary and tertiary mirrors subsequent to fabrication. Consequently, system alignment consists of the placement of only two elements, namely the first element, the common substrate on which the primary and tertiary mirrors are formed and the second element which is the secondary mirror.

5414555, May 9, 1995

Apr 15, 1993

8/048575

Gilbert Y. Chan - Diamond Bar CA
Kenneth G. Preston - Foxboro MA

Aerojet-General Corporation - Rancho Cordova CA

G02B 1706

359366

The fabrication of an off axis three-mirror telescope on only two substrates allowing two of mirrors to be formed on a common substrate, such as by means of diamond turning. The common substrate configuration is made possible by utilizing a common vertex for both the primary and tertiary mirrors so that alignment subsequent to fabrication requires placement of only two elements. In addition, all three mirrors in this invention share a common optical axis enabling an extremely simple mounting and housing design. The present invention is applicable for use in electro-optical imaging sensors operating from visible wavelengths to long infrared wavelengths. A telescope is formed by the assembly of three off-axis mirrors, including a primary mirror, a secondary mirror and a tertiary mirror. All three mirrors share a common system optical axis. In addition, the primary and tertiary mirrors also share a common vertex enabling the fabrication of two mirror surfaces on a common substrate with a diamond turning process, thus eliminating the need to align the primary and tertiary mirrors subsequent to fabrication.