6049 results about "Laser transmitter" patented technology

A scanning endoscope, amenable to both rigid and flexible forms, scans a beam of light across a field-of-view, collects light scattered from the scanned beam, detects the scattered light, and produces an image. The endoscope may comprise one or more bodies housing a controller, light sources, and detectors; and a separable tip housing the scanning mechanism. The light sources may include laser emitters that combine their outputs into a polychromatic beam. Light may be emitted in ultraviolet or infrared wavelengths to produce a hyperspectral image. The detectors may be housed distally or at a proximal location with gathered light being transmitted thereto via optical fibers. A plurality of scanning elements may be combined to produce a stereoscopic image or other imaging modalities. The endoscope may include a lubricant delivery system to ease passage through body cavities and reduce trauma to the patient. The imaging components are especially compact, being comprised in some embodiments of a MEMS scanner and optical fibers, lending themselves to interstitial placement between other tip features such as working channels, irrigation ports, etc.

Method and devices for emitting electromagnetic radiation at high power using nonpolar or semipolar gallium containing substrates such as GaN, AlN, InN, InGaN, AlGaN, and AlInGaN, are provided. The laser devices include multiple laser emitters integrated onto a substrate (in a module), which emit green or blue laser radiation.

The present invention provides a continuously tunable external cavity laser (ECL) with a compact form factor and precise tuning to a selected center wavelength of a selected wavelength grid. The ECL may thus be utilized in telecom applications to generate the center wavelengths for any channel on the ITU or other optical grid. The ECL does not require a closed loop feedback. A novel tuning mechanism is disclosed which provides for electrical or mechanical tuning to a known position or electrical parameter, e.g., voltage, current or capacitance, with the required precision in the selected center wavelength arising as a result of a novel arrangement of a grid generator and a channel selector. The grid generator exhibits first pass bands which correspond to the spacing between individual channels of the selected wavelength grid and a finesse which suppresses side band modes of the laser. The channel selector exhibits second pass bands that are wider than the first pass bands. In an embodiment of the invention the second pass bands have a periodicity substantially corresponding with the separation between the shortest wavelength channel and the longest wavelength channel of the selected wavelength grid and a finesse which suppresses channels adjacent to the selected channel. The broad second pass bands of the channel selector reduce the sensitivity of the ECL to tuning variations about the selected channel, thus avoiding the requirement of a closed loop feedback system to control the channel selector.

A method and device for emitting electromagnetic radiation at high power using nonpolar or semipolar gallium containing substrates such as GaN, AN, InN, InGaN, AlGaN, and AlInGaN, is provided. In various embodiments, the laser device includes plural laser emitters emitting green or blue laser light, integrated a substrate.

Multifunction assembly comprised of: an outer surface structure (CAR) containing a side door (D) that supports at least one exterior mirror assembly (RVM), an exterior door handle assembly (HE) of said door, and an exterior laser emitter (LE1) which emits a fixed and direct line of laser light (LL1) downwards on said ground adjacent to the vehicle, indicating an area (DA) where the doors open and combines functions associated with other indicator signal devices (BL), sensors and open door commands, and an ultraviolet light emitter device (EUV).

The invention discloses a device for measuring six-dimensional position poses of an object, which consists of a laser tracking instrument, a receiver, a computing unit and at least one small-sized laser light emitter, wherein the computing unit and the laser tracking instrument are fixedly arranged on the ground surface; the receiver is arranged on a moving object to be measured; the laser tracking instrument and the receiver communicate with the computing unit; the small-sized laser light emitter is arranged on the laser tracking instrument; a horizontal intersection angle and a pitching intersection angle of the laser tracking instrument are controllable, and the laser tracking instrument is provided with a laser distance measuring instrument; and the laser distance measuring instrument and the small-sized laser light emitter project laser light to a projection panel of the receiver respectively. The laser tracking instrument acquires a three-dimensional position of the receiver, and the computing unit solves three-dimensional postures of the receiver corresponding to a fixed coordinate system on the ground surface according to an azimuth angle of the laser tracking instrument and image data of laser faculae on the projection panel. The device can continuously measure moving objects or static objects in a large space, has the advantages of high precision, quick measuring speed, low cost and convenient arrangement, and can replace an expensive laser tracking instrument for measuring the six-dimensional poses.

A firearm laser training system according to the present invention includes a laser transmitter assembly and a cartridge adapter assembly, while employing modified blank cartridges to simulate firearm operation. The modified blank cartridges each have a quantity of explosive substance sufficient only to cycle the firearm. The laser assembly is configured for attachment to a firearm barrel and front sight and emits a beam of laser light toward a training system target in response to actuation of the firearm trigger. The laser beam is generally in the form of a pulse having a duration sufficient for the system target to detect a beam impact location. The cartridge assembly is disposed within the firearm barrel to adapt the firearm for compatibility with the modified blank cartridges for simulating firearm operation.

A free-space communication transceiver includes a telescope for transmitting and receiving laser beams, a tunable laser transmitter for generating a transmit laser beam modulated with data, a tunable optical receiver for processing a receive laser beam received from the telescope to recover data, and a tunable beamsplitter that directs the transmit laser beam to the telescope and directs the receive laser beam from the telescope to the optical receiver. Between the telescope and beamsplitter, the transmit and receive laser beams travel along a common optical axis as collinear collimated free-space beams. The transmit and receive laser beams operate at different wavelengths that can be interchanged, thereby support full-duplex operation. The beamsplitter employs a tunable etalon filter whose wavelength-dependent transmission characteristics are adjusted according to the transmit and receive wavelengths. Optionally, RF signals can additionally be couple to the common optical axis and transmitted and received by the telescope.

Disclosed herein is a scanning ladar transmitter that employs an optical field splitter/inverter to improve the gaze characteristics of the ladar transmitter on desirable portions of a scan area. Also disclosed is the use of scan patterns such as Lissajous scan patterns for a scanning ladar transmitter where a phase drift is induced into the scanning to improve the gaze characteristics of the ladar transmitter on desirable portions of the scan area.

A controller (320) for controlling various operational parameters of the Laser Module (303). The modulation drive signal (300) causes the circuits in the driver (301) to send a signal to the output (302) so that the laser can send an optical power output (304) proportional to the drive signal (300). The control methods in Laser Controller IC (320) consist of control algorithms embedded in firmware. The Laser Controller IC (320) includes support circuits for control of a laser. Some of the distinguishing features in the present invention are 1) feedback information from the sensors is obtained in a synchronous manner as a snapshot of the laser performance, and 2) algorithms handle the entire set of controls in firmware. The algorithm feature allows for advanced servo controls, which precisely stabilize the laser, can accommodate adaptive controls, and can be leveraged from one laser transmitter design to another.

A plurality of optical communications systems including a SPW modulator are described. The communications systems include an optical transmitter coupled to an optical fiber communications link which carries a optically modulated information signal to an optical receiver. The laser transmitter includes a laser light source which is optically coupled to a SPW modulator which has been particularly adapted for broadband communications by selecting its transfer characteristic and modulation structure. A broadband signal containing a plurality of information channels, for example CATV channels, is applied to it modulator electrodes. The modulation signal varies the power coupling between the guided laser light source signal and a SPW in the modulator. The result is an intensity modulated optical signal that is output to the optical fiber for transmission to the optical receiver of the system. Alternatively, the communications system includes a high power laser coupled to an optical splitter to divide its output power in two or more optical source outputs. Each optical source output is then used to drive an associated SPW modulator. Each of the modulators receives a broadband signal with which to modulate its optical source. After modulation, the modulated lightwave from a modulator is coupled to a corresponding optical fiber for carriage to an optical receiver. In this manner, several broadband information signals can be communicated over the system using only one laser source. A net benefit from using one higher power laser, rather than several lower power ones, is one of cost, purity and similarity of the several signals. This configuration is enhanced by the lower loss and higher linearity of the SPW modulators. Further, several WDM embodiments including those having serially cascaded SPW modulators are provided. The transfer characteristic of the SPW modulators are tailored to either be more efficient for an analog or a digital modulation signal by adding or subtracting grating effects.

The invention discloses a recognition system for multi-point touch and gesture movement capturing in three-dimensional space, and belongs to the technical field of intelligent recognition. The recognition system for multi-point touch and gesture movement capturing in the three-dimensional space comprises a miniature computer host, a laser projector, a first infrared camera, a second infrared camera, an LED (light emitting diode) lamp, a linear laser transmitter and a projection plane, wherein the laser projector projects contents processed by the miniature computer host, so that the projection plane is generated; the illumination plane of the linear laser transmitter is parallel to the projection plane; and the view field of the first infrared camera and the view field of the second infrared camera cover the projection plane and an aerial gesture recognition area. By using the recognition system for multi-point touch and gesture movement capturing in the three-dimensional space, the shortcoming that the present gesture recognition is based on a computer display is overcome. The recognition system for aerial gestures can be conveniently applied to the fields such as speech presentation by projectors, and is high in recognition precision.

A compact laser package with integrated temperature control is disclosed. In one embodiment, the compact laser package that includes a housing, a window through the housing, a laser emitter disposed in the housing, and an active temperature control device disposed in the housing. The laser emitter is disposed on the active temperature control device and aligned such that optical signals generated by the laser emitter can be emitted through the window without a waveguide. Additionally, the housing has an outline similar to that of a transistor-can. Temperature measuring device and laser power detection device may also be integrated within the laser package.

An organic vertical cavity laser light producing device (10) comprises a substrate (20). A plurality of laser emitters (200) emits laser light in a direction orthogonal to the substrate. Each laser emitter within the plurality of laser emitters has a first lateral mode structure in a first axis orthogonal to the laser light direction and has a second lateral mode structure in a second axis orthogonal to both the laser light direction and the first axis. Each laser emitter comprises a first mirror provided on a top surface of the substrate (20) and is reflective to light over a predetermined range of wavelengths. An organic active region (40) produces laser light (350). A second mirror is provided above the organic active region and is reflective to light over a predetermined range of wavelengths. A pumping means excites the plurality of laser emitters.

Disclosed herein is a scanning ladar transmitter that employs an optical field splitter/inverter to improve the gaze characteristics of the ladar transmitter on desirable portions of a scan area. Also disclosed is the use of scan patterns such as Lissajous scan patterns for a scanning ladar transmitter where a phase drift is induced into the scanning to improve the gaze characteristics of the ladar transmitter on desirable portions of the scan area.

The invention relates to a position and attitude parameter measurement system of a machine body of a boring machine and a method thereof, and the position and attitude parameter measurement system consists of a line laser transmitter, a rack of the line laser transmitter, laser targets, a programmable computer controller, an A/D conversion module and two inclination sensors. The line laser transmitter is positioned by a laser direction indicator and the rack of the line laser, emits a fan-shaped laser beam and forms linear spots on the machine body of the boring machine. An photosensitive element in one position on one of the two laser targets consisting of the photosensitive elements senses the laser beam and generates a current signal at any time, and the current signals are processed and calculated by an internal circuit of the laser targets and the programmable computer controller, thereby determining the positions of the laser beam on the laser targets; furthermore, the mounting positions of the laser targets on the boring machine are known, thereby obtaining a deflection angle and deflection displacement of the boring machine. Two inclination sensors measure a pitch angle and a roll angle of the boring machine, thereby completing the measurement of position and attitude parameters of the machine body of the boring machine. The system has the advantages of low cost, high precision, good real-time property and convenient operation.

The invention relates to a laser ranging system, which comprises a transmitting module comprising a transmitting optical system and a laser emitter for emitting a pulsed laser signal; a receiving module comprising a receiving optical system and a laser receiver for receiving the pulsed laser signal and converting the pulsed laser signal to a pulsed electrical signal; a time/digital converter for detecting and calculating the time difference between the transmitting the pulse signal and the receiving the pulse signal; a clock generator for outputting a calibrated clock signal to the time/digital converter; and a single chip microcontroller for controlling the transmitting module, the receiving module, the time/digital converter and the clock generator and calculating the actual distance of a target object from the position of the laser ranging system according to the time difference. The inventive laser ranging system has the advantages of compact optical system, high accuracy in time difference detection, calculation and calibration, small size of the entire product, low cost, less error and high reliability.

A light field display, having at least one laser emitter, an optical modulator for modulating light from the laser emitter with video information; a beam focus modulator; an array of beam scanning elements; an electrically controllable beam focus modulator; and at least one at least one waveguide having at least one transparent substrate, an input grating and an output grating for extracting light from the waveguide; and an eye tracker.

The invention relates to a method and arrangement for generating a virtual keyboard in connection with an electronic apparatus (10) on a planar surface (16). The virtual keyboard is drawn by a laser transmitter (11), and the light reflected from an obstacle (15b) in the area of the virtual keyboard is received. The angle of incidence and time of arrival of the received signal are observed, and on the basis thereof a conclusion is drawn about whether a certain key in the virtual keyboard has been pressed.