Optovia Corporation

Jds Uniphase Corporation

Advanced Numicro Systems, Inc.

Hsing C Cheng

Hamid R Khazaei

Hongmin Chen

Yee-Chung Fu

Emily M Squires

Harmeet Singh

David Kirk Lewis

A touch panel system includes micro-electro-mechanical system (MEMS) groups. Each group includes an emitter producing a beam, and a MEMS mirror located about a corner of a touch panel screen. The MEMS mirror reflects the beam to create a beam sweep across a touch panel surface. An array of photo sensors is located parallel to an edge of the touch panel screen to detect reflected beams from an object about the touch panel surface. Based on when the reflected beams are detected, the angular positions of the MEMS mirrors can be determined and correlated to the object's position.

Scanning mirror touch screen

In an optical grating device, a grating arrangement receives different wavelength output signals from a plurality of radiation sources at input ports thereof, and generates therefrom a multiplexed wavelength output signal at a zero diffraction order output port of the grating arrangement. Additionally, the gating arrangement generates at least one predetermined wavelength output signal at one of a group consisting of a separate predetermined location in an at least one of a symmetric non-zero diffraction order of the grating arrangement, within the grating arrangement itself, and a combination thereof. A separate power tap is coupled to detect the power of a separate one of the at least one predetermined wavelength output signal from the grating arrangement.

Optical grating based multiplexer device with power tap capability

In a stabilized laser system, a an output signal is to be generated having a desired central wavelength. At least one laser, which, while emitting light and having a preselected portion thereof fed back thereto, causes the output signal of the laser to be shifted in wavelength in a first direction which is spaced apart from the center wavelength of the fed back signal. A feedback generating arrangement processes a first portion of the output signal from each laser and generates a feedback signal having a spectral response peaking at a wavelength shifted in an opposite direction to the first direction generated by each laser. The feedback signal each laser to provide an output signal at the output of the stabilized laser system having a spectral response that peaks essentially at the desired wavelength.

High efficiency single and multiple wavelength stabilized systems

In a stabilized laser system, an output of a desired wavelength is generated. Each of a plurality of n lasers, which, while emitting light and having a preselected portion thereof fed back thereto, causes the fed back portion to be amplified and shifted in wavelength in a first direction which is spaced apart from the center wavelength of the feedback signal. A feedback stabilization arrangement is coupled to output ports of the plurality of n lasers for generating a feedback signal having a wavelength spectrum peaking at a wavelength shifted in an opposite direction to the first direction generated by the lasers in response to the feedback signal so as to provide an output signal at the output of the stabilized laser system having a wavelength spectrum that peaks essentially at the desired wavelength. A reflector is located at a predetermined signal round-trip time delay distance from the feedback stabilization arrangement. The reflector receives the output signal from the feedback stabilization arrangement and passes a first portion thereof therethrough, and reflects a remaining second portion back to the feedback stabilization arrangement as a secondary feedback signal that contributes to each of the plurality of n laser sources being set in a stable coherence collapse mode.

Growing community of inventors

San Jose, CA, United States of America

Hsing C Cheng