11 results about "Laser source" patented technology

A robotic laser-pointing apparatus has an instrument center, a first rotation axis, a second rotation axis, and a pointing axis, with the first rotation axis, the second rotation axis and the pointing axis in a known relationship to the instrument center. A laser source provides a pointing-laser beam along the pointing axis. A pointing drive system aims the laser beam by rotating the pointing axis about the instrument center in response to a pointing-direction control. Focusing optics having a focusing-optics drive serve to focus the pointing-laser beam in response to a focusing-optics control. A processor, responsive to target-position information, generates the pointing-direction control and the focusing-optics control. Some embodiments include an electronic-distance-measurement system having a measurement beam. Some embodiments provide for compensation of aiming errors of the pointing-laser beam and the measurement beam.

The invention discloses a multi-wavelength femtosecond laser scanning type etching method for a printed circuit board. According to the multi-wavelength femtosecond laser scanning type etching method for the printed circuit board, a femtosecond laser device provided with a frequency doubling module is used as a laser source, and the femtosecond laser device can emit laser beams with different wavelengths so as to etch different layers, made of different materials, on the printed circuit board correspondingly; etching of all the layers of the printed circuit board can be completed on the same station, and machining errors caused by repeated positioning are avoided; meanwhile, more refined line-width etching can also be achieved, so that the printed circuit board is made smaller, lighter and thinner; machining is convenient, and the machining precision and quality are excellent.

A method for measuring the mean velocity (V_H) of an extracorporeal blood fluid or infusion fluid, by means of retroinjection interferometry, comprises the step of emitting a first laser light beam (41), from the laser cavity (40) of a semiconductor laser source (60), reflection of a second laser beam (45) by the fluid (50) and consequent generation of interference with the first laser beam (41) inside the laser cavity (40), detection of the interference signal by a monitoring photodiode (46), and processing, by means of an electronic processing and control circuit (100), of the interference signal detected. The invention also comprises an apparatus (62) for implementing the method described and an extracorporeal circuit (58) comprising said apparatus. The invention also comprises a method for replacing a laser source in said apparatus.

The invention discloses a light source device, a light source producing method and a laser projector comprising the light source device. The light source device comprises a first laser source, a collimation part, a reflecting part, a first light condensation part, a dichroic part, a driving part, a second light condensation part, a wavelength converting part, a third light condensation part, a light receiving part and a reflecting steering lens group. According to the light source device, the light source producing method and the laser projector comprising the light source device, the problem that a light source generates periodic brightness variation can be effectively avoided, and the quality of projector images is greatly improved.

The invention discloses a return loss measuring method of optical devices, which comprises the following steps: step 1: a three-port optical fiber circulator is prepared, the second port of the three-port optical fiber circulator is connected with one laser source, the third port of the three-port optical fiber circulator is connected with a standard optical power meter, and the insertion loss of device optical power from the second port to the third port is measured; step 2: the first port of the circulator is connected with the other laser source, the second port is connected with a measured optical device, the third port is connected with the standard optical power meter, and power of the light that is reflected by the measured optical device is measured; step 3: the optical power loss of a node S between the second port of the optical fiber circulator and the measured optical device is measured; step 4: the return loss of the measured optical device is calculated.

An optical pickup apparatus has a semiconductor laser source which emits a laser beam in a wavelength band of 405 nm having an elliptic light intensity distribution; a beam shaping element which shapes the light intensity distribution of the laser beam; a polarizing beam splitter having a polarized light separation film in contact with the air and reflecting the laser beam shaped by the beam shaping element on the polarized light separation film; and an objective lens which focuses the laser beam reflected on the polarized light separation film onto an optical information recording medium.

The invention discloses a non-contact detection method for detecting the elastic parameter uniformity of a material on line. A non-contact real-time characterization method is used for the elastic parameters of a solid material, and comprises the steps of: (1) radiating pulse laser to a spatial modulator, generating two beams of coherent light after the pulse laser passes through the spatial modulator; wherein the laser source is a nanosecond or a picosecond pulse light source, the pulse light is split through the spatial modulator consisting of gratings, and the +/- level serves as a coherent light source; (2) radiating the two beams of coherent light to the surface of the tested material and generating spatial coherent interference field by utilizing an optical component lens group, forming alternately dark and bright interference fringes on the surface of the tested material, wherein the distance between the alternately dark and bright interference fringes is acquired by adjusting the lens group or the gratings; and (3) generating sound waves of which the wavelength corresponds to the distance between the interference fringes in a thin-film material after the interference fringes formed by the pulse light source are absorbed by the thin-film material, and performing non-contact detection for characterizing and analyzing the elastic parameters of the solid sample.

The invention relates to the technical field of auxiliary positioning of tumor radiotherapy, in particular to a dual-photosensitive tumor positioning method and an auxiliary device based on laser source and laser shadow, which solve the defects of certain limitation and poor safety of the existing tumor scanning positioning marking equipment, and the auxiliary device comprises a positioning auxiliary device and a positioning auxiliary device carrier; the positioning auxiliary device comprises a device shell, three stepping motors are distributed at the end of the device shell in the circumferential direction, a control device is arranged at the position, located between the stepping motors, of the end of the device shell, a connector is further arranged at the end of the device shell, and output shafts of the stepping motors are connected with guide rods. The positioning auxiliary device can be installed on a CT scanning bed and can also be held by hand, accurate, rapid and convenient marking or later re-drawing deepened marking can be conveniently carried out in cooperation with the CT scanning equipment, and compared with a traditional marking mode, the positioning auxiliary device has the advantages of being accurate, high in automation degree, portable and wide in application scene.