37 results about "Laser nd-yag" patented technology

A tunable laser and laser tuning method based on the use of a tunable etalon in reflection as a mirror within a laser cavity and forming an end reflective surface thereof. The laser emission wavelength is not necessarily at a wavelength of peak etalon reflectivity. A preferred embodiment makes use of a microelectromechanical etalon to tune an external cavity semiconductor.

A laser system, such as a master oscillator / power amplifier system, comprises a gain medium and a stimulated Brillouin scattering SBS mirror system. The SBS mirror system includes an in situ filtered SBS medium that comprises a compound having a small negative non-linear index of refraction, such as a perfluoro compound. An SBS relay telescope having a telescope focal point includes a baffle at the telescope focal point which blocks off angle beams. A beam splitter is placed between the SBS mirror system and the SBS relay telescope, directing a fraction of the beam to an alternate beam path for an alignment fiducial. The SBS mirror system has a collimated SBS cell and a focused SBS cell. An adjustable attenuator is placed between the collimated SBS cell and the focused SBS cell, by which pulse width of the reflected beam can be adjusted.

A microscope illumination apparatus includes an optical conversion unit that converts laser light incident thereon from a light source to laser light that has an NA and whose main optical axis is distributed on a conical surface that widens at a predetermined angle with respect to an incident optical axis of the laser light, and from which the laser light exits, and an optical device that has no refractive power and that deflects the laser light, which has exited the optical conversion unit, in a direction parallel to the incident optical axis, wherein the microscope illumination apparatus focuses laser light that has exited the optical device at a pupil position of a focusing lens for illuminating a specimen or a position that is conjugate with the position.

The invention relates to a method for determining a closed trajectory curve (10) by a laser (12) and a laser light sensor (14) having a flat field of view (16), which includes the steps A to G, as well as an apparatus (36) for determining a closed trajectory curve (10).

The invention discloses a micro-area photoelectric tester for multi-junction solar cells, which includes a tunable laser module, a laser processing module, an optical chopper, a biased white light module, a filter set, a dual optical path optical microscope, a scanning module, a display Micro-electrical fixtures, power supplies and electrical test units and standard batteries. The tunable laser and laser processing module provide signal light for multi-junction cell micro-area testing, the signal light is modulated by the beam chopper module, the bias white light module and filter set provide bias light, and the signal laser and The bias light is focused on the solar cell, and the test process is monitored by synchronous real-time imaging of the camera, and the microelectric fixture is connected with the power supply and the electrical test unit to provide the test of the bias voltage and electrical signal. The characteristic of this instrument is that it does not need other shielding systems, can monitor synchronously in real time, achieves high precision, fast and non-destructive sub-micron spatial resolution, and multi-spectral response micro-photoelectric conversion characteristics test of multi-junction solar cells.

The invention discloses a laser imaging device with unequal distances, comprising a laser chip, an optical element, a printing substrate and a rotary drum, wherein the laser chip emits a plurality of laser arrays which are parallel to each other and are at intervals with each other, the optical element is used for focusing a light beam, the laser array is imaged on the printing substrate, the rotary drum is used for driving the printing substrate to rotate, each laser array comprises a plurality of laser groups which are arranged at intervals with each other, a distance between every two adjacent laser groups is a first distance, each laser group comprises a first laser and a laser sub-group, a distance between the first laser and the laser sub-group is a second distance, the first distance is unequal to the second distance, each laser sub-group comprises at least two beams of second lasers, and the distance between the adjacent second lasers in each laser sub-group is not equal to the second distance and the first distance, respectively. By adopting the multi-distance laser array, some additional performances, such as more flexible design can be obtained, the performance can be further optimized, and requirements on different users can be better satisfied.

The invention relates to a coal and rock identification device based on the cutting of a drum shearer. The coal and rock identification device includes a protective sleeve, a mounting bracket, a water sprayer, an ultrasonic transducer, a laser transmitter, and a laser receiver. In the protective sleeve, the protective sleeve is installed on the shell of the rocker arm, and the water sprayer, ultrasonic transducer, laser transmitter and laser receiver are all installed on the mounting bracket. The beneficial effects of the present invention are: through the function of transmitting and receiving ultrasonic waves of the ultrasonic transducer, the water flow ejected from the sprinkler can be used as the coupling medium, the coal-rock interface can be identified according to the echo characteristics, and the laser and laser can be emitted by the laser transmitter. The receiver receives the laser and can identify the coal-rock interface according to the laser characteristics, so that the coal-rock interface identified by the echo characteristics can be compared with the coal-rock interface identified by the laser characteristics, and the coal-rock interface of the drum shearer can be improved. Recognition ability, in order to facilitate the cutting operation of the roller shearer.

The invention provides a light source system and a projection device. The light source system includes: a laser light source, a supplementary light source, a wavelength conversion device and an imaging subsystem. Laser light source for emitting laser light. A fill light that emits fill light. The wavelength conversion device is used to convert the laser light into the subject light, and emit the first light including the subject light and the laser light. The imaging subsystem is used to form the first light imaging beam, the supplementary light imaging beam and the mixed light imaging beam; the imaging subsystem includes a light combination device and a reflection assembly, and the light combination device is placed between the first light imaging beam and the supplementary light imaging beam The junction; the reflective assembly is placed between the wavelength converting device and the light combining device. The present invention folds the optical path by arranging reflective components in the imaging subsystem, reasonably utilizes the optical path, miniaturizes the wavelength conversion device, improves space utilization in the optical path, and reduces the volume of the light source system.