Peter Fai Yeung

US Patent:

49264125, May 15, 1990

Filed:

Feb 22, 1988

Appl. No.:

7/158396

Inventors:

Tomasz P. Jannson - Redondo Beach CA
Joanna L. Jannson - Redondo Beach CA
Peter C. Yeung - Redondo Beach CA

Assignee:

Physical Optics Corporation - Torrance CA

International Classification:

H04B 900

US Classification:

370 3

Abstract:

A wavelength division multiplexer/demultiplexer having optical path lengths between a fiber array and a Fourier transform lens, and between a dispersion grating and the lens equal to the focal length of the lens. The optical path lengths reduce losses due to angular acceptance mismatch in the multiplexer. Close orientation of the fiber array about the optical axis and the use of a holographic dispersion grating reduces other losses in the system. Multi-exposure holographic dispersion gratings enable the multiplexer/demultiplexer for extremely broad-band simultaneous transmission and reflection operation. Individual Bragg plane sets recorded in the grating are dedicated to and operate efficiently on discrete wavelength ranges.

US Patent:

47671645, Aug 30, 1988

Filed:

Feb 18, 1987

Appl. No.:

7/016463

Inventors:

Peter C. Yeung - Glendale CA

Assignee:

Crane Co. - New York NY

International Classification:

B60T 832
G01D 534
H01J 4014

US Classification:

303 91

Abstract:

A reflective optical wheel speed transducer system is disclosed. The system utilizes a single optical fiber to transmit light to a pair of interrupter discs, and to collect light reflected from the discs. One of the interrupter discs is stationary, and one is rotated at an angular velocity proportional to the rotational speed of a wheel. Both discs are provided with alternating, regularly spaced reflecting and transmissible areas. The reflecting areas of the stationary disc reflect a constant bias level of light to the optical fiber. The reflecting areas of the rotatable disc modulate light passing through the transmissible areas of the stationary disc at a rate proportional to the angular velocity of the wheel. Thus, the interrupter discs generate a modulated light signal that rides on top of the fixed bias signal. Decoding circuitry is provided to convert the modulated component of the light signal to an electrical signal that represents the rotational speed of the wheel.

US Patent:

48984507, Feb 6, 1990

Filed:

Aug 31, 1987

Appl. No.:

7/091520

Inventors:

Joanna Jannson - Redondo Beach CA
Peter Yeung - Redondo Beach CA

Assignee:

Physical Optics Corporation - Torrance CA

International Classification:

G02B 638

US Classification:

350 9621

Abstract:

There is disclosed an expanded beam fiber to fiber connector, based on non-imaging optic principles for coupling light beams from one optical fiber to another. The system consists of two identical connector parts, referred to herein as a collimating part and a concentrating part, each having a preferred partially curved reflective boundary surface for minimizing power loss and surrounding either a hollow space or a space filled with a uniform transparent medium. In one embodiment the boundary is metallic while in a second embodiment the boundary is in the form of an interface allowing total internal reflection. In both the hollow and filled case a lens may be located at the expanded end of both the collimater part and the concentrator part forming the connector. The connector is preferably located in a housing in order to protect and preserve the mechanical stability of the coupler.

US Patent:

48386308, Jun 13, 1989

Filed:

Dec 21, 1987

Appl. No.:

7/135706

Inventors:

Tomasz P. Jannson - Redondo Beach CA
Joanna L. Jannson - Redondo Beach CA
Peter C. Yeung - Redondo Beach CA

Assignee:

Physical Optics Corporation - Torrance CA

International Classification:

G02B 532
G02B 626
G02B 632

US Classification:

350 37

Abstract:

An optical interconnect employing planar volume Bragg hologram technology in two dimensions comprises a dichromated gelatin planar volume Bragg hologram disposed in a glass planar optical path. Multiplexed Bragg plane sets selectively diffract information-bearing light signals such as voice, image, or computer data signals in a VLSI system from a laser diode or LED source coupled to the planar optical path toward high-speed photodiodes. The holographic planar optical interconnect can interconnect up to 1000 different signals between VLSI microelectronic components and systems.

US Patent:

20150101019, Apr 9, 2015

Filed:

Oct 8, 2013

Appl. No.:

14/048041

Inventors:

Peter Yeung - Redondo Beach CA, US

International Classification:

H04W 12/06
H04W 12/04

US Classification:

726 4

Abstract:

Embodiments of a system and method allowing a host system to select among a plurality of Remote Client Computers (RCC) the one RCC that is wirelessly coupled to and closest to a specific Wireless Mobile Communication Device (WMCD) to communicate with are described. The coupling between the RCC and the WMCD is for the purpose of determining which RCC in the network the server should send the data to and receive from. The process is executed on a host server computer coupled to a plurality of RCC over either a wireless or wired network. The server computer detects the presence and precise location of a WMCD using a system of wireless sensors. Once the precise location of the WMCD is determined, the server system selects among a plurality of RCC the one RCC that is wirelessly coupled to and closest to a specific WMCD to communicate with.