JAMES ALAN ARNS
Pilots at Lexington Dr, Saline, MI

6661945, Dec 9, 2003

May 14, 2001

09/855056

James M. Tedesco - Livonia MI
James Arns - Saline MI

Kaiser Optical Systems, Inc. - Ann Arbor MI

G02B 628

385 24, 385 31, 385 36, 385 37

Multiplexed grating and grating/prism devices are particularly suited to DWDM optical telecommunications networks, finding utility in optical spectrum analyzers (OSAs) and fiber multiplexer/demultiplexers. The invention may be used to address both single- and dual-band configurations through adjustment of the grating, detector array, and/or inclusion of a fiber-optic switch. As a dual-band OSA covering the C- and L-bands, a device according to the invention may be used to replace two separate OSAs like those currently in production, at only a modest increase in cost relative to a single-band OSA.

6449066, Sep 10, 2002

Apr 28, 2000

09/560595

James A. Arns - Saline MI
Willis S. Colburn - Ann Arbor MI

Kaiser Optical Systems, Inc. - Ann Arbor MI

G02B 532

359 15, 359 34, 359130, 359566, 385 24, 385 37, 385 36

A volume-phase optical grating, preferably supported between substrates and prisms, uses large-angle input and output light beams to provide a very high degree of dispersion and improved separation of closely spaced wavelength channels. The average refractive index of the grating medium is also less than that of the supporting substrates and prisms, thereby providing improved uniformity and reduced sensitivity to the state of light polarization. The device therefore finds utility as a wavelength multiplexer, demultiplexer or optical spectrum analyzer in fields such as optical communications and optical signal processing. The grating itself may be constructed by conventional interferometric or holographic techniques, and may be a reflection or transmission device. In a system configuration, optical fibers may be used to carry the multiplexed or demultiplexed optical signals. Optoelectric detectors may also be used to detect different wavelengths and convert the optical signals into electrical counterparts.

5406395, Apr 11, 1995

Nov 1, 1993

8/143958

David T. Wilson - Torrance CA
John E. Wreede - Azusa CA
John E. Gunther - Torrance CA
James A. Arns - Saline MI

Hughes Aircraft Company - Los Angeles CA

G02B 2722

359 15

An optical parking alignment system that includes at least one projector located on a vehicle for projecting a respective image forwardly of the vehicle, whereby alignment of the vehicle is indicated when each respective image is in focus on a screen disposed in front of the vehicle. The projector cam comprise a transparency and an imaging lens, or a hologram and a narrowband light source.

6278534, Aug 21, 2001

Nov 26, 1997

8/980154

James A. Arns - Saline MI

Kaiser Optical Systems - Ann Arbor MI

G02B 532, G02B 2744, G03H 100, G01J 318

359 15

A compact, preferably monolithic optical element converts an incident beam of light into a dispersed exit beam. A transmissive optical grating is supported between two reflective surfaces such that a beam is reflected to pass through the same grating at least twice to form the exit beam. In the preferred embodiment the grating is a volume hologram cemented between two optically transmissive substrates which include outwardly oriented surfaces that are parallel to one another and to the grating, and the internal reflections occur at these surfaces. Mirrors may also be used. A preferred method of grating formation is also disclosed.

7230761, Jun 12, 2007

Apr 29, 2005

11/118978

James A. Arns - Saline MI, US

Kaiser Optical Systems, Inc. - Ann Arbor MI

G02B 37/44, G02B 5/18

359566, 359 15, 359831, 359834, 359837, 385 37

A grism based upon a grating with a given line frequency is configured such that a design wavelength will undergo either a specific total bend angle, a zero-degree total bend without lateral displacement, or a zero-degree total bend with a lateral displacement. Each configuration exhibits the same dispersion characteristics. Other design wavelengths, bend angles and displacements are possible through appropriate adjustment of grating frequency, prism geometry, and/or material(s). A specific design is disclosed using light with a +/−delta wavelength around a design wavelength of 795 nm. The invention may be used to disperse light at different wavelengths, including wavelengths associated with optical communications bands.