Other

Respironics, Inc.

Laser Guidance Inc.

Spectra-physics Gmbh

Stellar Photonics, LLC

Cafaro Laser, Ltd.

David M Shemwell

Donald Limuti

Weihao Alexander Long

Robert Lee Fuhriman, Jr

George R Ryan

Michael Perry Challenger

Alan August Vetter

Michael Perry Challeneger

The invention relates to an airfield light comprising a body, a medium intensity lighting arrangement, and a high intensity lighting arrangement. The medium intensity lighting arrangement provides an omnidirectional light source, and the high intensity lighting arrangement provides a unidirectional or bidirectional light source. The invention is energy efficient compared to conventional airfield lights, and has particular application to temporary airfields. LEDs may be used as the light sources.

Compact portable/fixed airfield light

Overcoming limitation in brightness and heating effects for LED based Precision Approach Path Indicators and allowing both colors to be imaged in the far field with the proper abrupt transition between the red and white sectors, making use of linear arrays of LED's and cylindrical optics.

Light emitting diode based PAPI method and system incorporating diode arrays and cylindrical optics

A shield produces a 'dazzling' effect: disorientation and temporary and fully reversible blindness in subjects for the purpose of threat deterrence. The apparatus is comprised of a plurality of light emitting diodes (LEDs) capable of intense illumination. Light emitted by each LED is further pulsed and focused by reflective optics to produce a dazzling effect. The shield further provides ballistic protection, chemical or electrical crowd control functionality, safety-glass breaking capability, optically propagated communications and an arm strap to further secure the shield.

LED dazzler shield

An apparatus produces a 'dazzling' effect: disorientation and temporary and fully reversible blindness in subjects for the purpose of threat deterrence in both civilian law enforcement and military engagements without the use of lasers. A plurality of light emitting diodes (LEDs) capable of intense illumination is provided. Light emitted by each LED is pulsed and focused by reflective optics to produce a pulsed beam of sufficient intensity that the combined effect of the beams from the LEDs induces dazzling in subject viewers in the target range. Further included in or ancillary to the invention are a power source for powering the LEDs a signal source and controller for controlling their illumination and pulsing, and a shield suitable for protecting a user against projectiles.

LED dazzler

An apparatus for transferring two frequencies of electromagnetic energy to and from a portion of a living body for the purpose of blood oxygen saturation measurements. The two frequencies of electromagnetic energy are transferred to the portion of the living body through a single optical fiber cable (which could be a bundle) to a coupler and then through a short section of optical cable to an optical element adjacent to the portion of the living body. After the two frequencies of electromagnetic energy are transmitted through the portion of the living body they are received by another optical element and transported away from the portion of the living body to a coupler through a short section of optical cable where they may be converted to electrical signals. Alternatively, the two frequencies of electromagnetic energy are carried away from the coupler. The signals from the coupler (whether they are electromagnetic signals or electrical signals) are directed to a measurement instrument, which through an adapter may be a conventional measurement instrument known in the prior art or a measurement instrument specifically designed for use with the signals produced at the coupler. The two short sections of optical cable and the two optical elements adjacent to the portion of the living body and the coupler are combined to form a disposable probe. Alternatively, the disposable probe can include a transducer to convert the transmitted optical energy to electrical signals.

Disposable fiber optic probe

A method and apparatus for transferring two frequencies of electromagnetic energy to and from a portion of a living body for the purpose of blood oxygen saturation measurements. The two frequencies of electromagnetic energy are transferred to the portion of the living body through a single optical fiber cable (which could be a bundle) to a coupler and then through a short section of optical cable to an optical element adjacent to the portion of the living body. After the two frequencies of electromagnetic energy are transmitted through the portion of the living body they are received by another optical element and transported away from the portion of the living body to a coupler through a short section of optical cable where they may be converted to electrical signals. Alternatively, the two frequencies of electromagnetic energy are carried away from the coupler. The signals from the coupler (whether they are electromagnetic signals or electrical signals) are directed to a measurement instrument, which through an adapter may be a conventional measurement instrument known in the prior art or a measurement instrument specifically designed for use with the signals produced at the coupler.

Method and apparatus for diode laser pulse oximetry using fiber optical

In this application are disclosed a variety of improvements to the original system. These improvements provide for greater utility, effectiveness, and ease of manufacturing of the laser visual landing aid system.

Laser based visual landing aids and method for implementing same

A method and apparatus for aiding a landing aircraft. Three differently-colored beams of laser light are produced and transmitted, one of the beams of laser light being transmitted in a plane containing the direction from which the aircraft is approaching. Another of the beams of light is transmitted on one side of the plane, and the third of the beams of light is transmit on the other side of the plane. The pilot of the aircraft can determine whether the aircraft is on the plane or to the one side or the other by the color of the light the pilot receives. If desired, at least one of the colored laser beams that is transmitted toward one side of the plane can be broken into a plurality of adjacent fan-shaped beams, the light in at least one of the fan-shaped beams being interrupted intermittently.

Method and apparatus for aiding a landing aircraft

A distance-measurement system and method for its use. The system includes a transmitter located at one location and a receiver, at least portions of which are located at the second location. The transmitter produces a scanning beam of laser light that is narrow in its scanned direction and broad in the orthogonal direction. The beam is scanned at a substantially constant angular velocity. The receiver has at least a pair of apertures and associated photodiodes held in a predetermined configuration. The receiver measures the time interval between the times at which the apertures are illuminated by the scanning beam. Based on these time intervals, the receiver can calculate the distance from the first location to the second location. The scanned beam can also be polarized and the receiver can include polarization detection and a lateral effect cell to account for relative rotation and tilt of the transmitter and receiver.

Growing community of inventors

Seattle, WA, United States of America

David M Shemwell