8 results about "Laser fluorescence" patented technology

The utility model discloses a light source device and projection equipment, the light source device comprises a laser module, a fluorescent module and a dodging piece, and the laser module is used for generating specified laser; the fluorescence module is used for generating specified fluorescence; the dodging piece is arranged on a light path where the specified laser and the specified fluorescent light are located; the dodging piece is provided with a light incident surface, the specified laser is incident to the light incident surface to form a laser spot, the specified fluorescent light is incident to the light incident surface to form a fluorescent light spot, and the laser spot and the fluorescent light spot do not coincide. The laser spot and the fluorescent light spot are not overlapped, so that the specified laser and the specified fluorescent light are not combined in the process of being transmitted to the light uniformizing piece, but are respectively incident to the light uniformizing piece as two paths of independent light rays. Therefore, the light source device can avoid fluorescence loss caused by the arrangement of the light combination part, so that the projection equipment provided with the light source device has higher projection brightness.

Provided is a light source device, including a first laser light source group, a second laser light source group, a dichroic mirror, a fluorescence converter, and an emission component. The first laser light source group emits laser light of a first waveband, and the second laser light source group emits laser light of a second waveband and laser light of a third waveband. The dichroic mirror is disposed on light-output sides of the first laser light source group and the second laser light source group, and the fluorescence converter and the emission component are respectively disposed on light-output sides of the dichroic mirror. The dichroic mirror is configured to emit laser light of various wavebands, and the fluorescence converter generates target fluorescence under the excitation of the laser light of the first waveband, and the target fluorescence is reflected by the dichroic mirror to the emission component.

The application discloses a current sensor based on a solid-state spin system. The current sensor comprises four-way probes and a data processing unit. Each way probe comprises a magnetic sensitive unit, a microwave unit, an optical unit, two optical detection units and a lock-in amplifier. The optical unit comprises a laser generator and a lens group for dividing the laser emitted by the laser generator into two optical paths of the main path and the reference path. The magnetic sensitive unit comprises a diamond sample containing NV color centers in four main axis directions. The microwave unit comprises a wave source, a radiation structure, a waveguide structure and a wave source control system. The two optical detection units respectively convert the optical signals on the reference path and the fluorescence into corresponding electrical signals for demodulation by the lock-in amplifier. The application realizes four-axis closed-loop measurement by modifying the microwave frequency, and the directions of the four axes are determined by the crystal direction of the diamond single crystal, so that the current sensor has better stability and orthogonality compared with a three-axis TMR magnetic sensor composed of three TMR magnetic sensors.

The invention provides a uranium concentration on-line measuring instrument based on a laser fluorescence method, and belongs to the technical field of nuclear radiation monitoring and environmental analysis, the measuring instrument comprises a light source module, a sample module, a photoelectric conversion module and a data acquisition module, the light source module is connected with the sample module through an optical fiber; the photoelectric conversion module comprises a silicon photomultiplier SiPM and a pre-amplifier, the sample module is connected with the silicon photomultiplier SiPM through an optical fiber, the silicon photomultiplier SiPM is connected with the pre-amplifier through a signal line, and the pre-amplifier is connected with the data acquisition module through a signal line. According to the uranium concentration online measuring instrument based on the laser fluorescence method, the problems that an existing traditional laboratory analysis method is long in period and tedious in process, and existing field detection equipment is narrow in measuring range and insufficient in sensitivity are solved.

The invention relates to an optical nonlinear operation device, an optical nonlinear operation assembly and a preparation method of a fluorescent material. The optical nonlinear arithmetic device comprises a fluorescent material layer and a reflecting layer, wherein the fluorescent material layer covers one side of a reflecting surface of the reflecting layer; the fluorescent material layer comprises a fluorescent material, the fluorescent material layer is used for absorbing part of incident laser emitted by the incident light source, and the service life of the fluorescent material is 1 nanosecond to 50 microseconds; the reflecting layer comprises a plane reflecting mirror and is used for reflecting the rest of incident laser emitted by the incident light source except for part of the incident laser. By adopting the device provided by the invention, the calculation effect of optical calculation can be improved.

The invention provides a light generating system (1000) comprising a first solid state light source (10), a first luminescent converter (2100), a second luminescent converter (2200), and a first thermally conductive body (3100); wherein: (A) the first luminescent converter (2100) and the second luminescent converter (2200) are configured physically separated by a shortest distance d1, thereby defining an inter-converter cavity (1200); wherein 0.3 mm ≤ d1 ≤ 3 mm; (B) the first luminescent converter (2100) comprises a first converter first major face (2110) and a first converter second major face (2120) opposite the first converter first major face (2110); wherein the first luminescent converter (2100) is configured in thermal contact with the first thermally conductive body (3100) at the first converter second major face (2120); (C) the first solid state light source (10) comprises a laser light source and / or a superluminescent diode, wherein the first solid state light source (10) is configured to generate first light source light (11); wherein the first solid state light source (10) is configured to irradiate the first converter first major face (2110) via a first optical path (31) between the first solid state light source (10) and the first luminescent converter (2100); wherein the first optical path (31) intersects at least part of the inter-converter cavity (1200) and passes by the second luminescent converter (2200); wherein the first luminescent converter (2100) is configured in the reflective mode; wherein the first luminescent converter (2100) is configured to (i) convert part of the first light source light (11) received by the first luminescent converter (2100) into first luminescent converter light (2101), and (ii) reflect at least part of the first light source light (11) received by the first luminescent converter (2100) to the second luminescent converter (2200) as reflected first light source light (111); (D) the second luminescent converter (2200) is configured to (a) convert at least part of the reflected first light source light (111) received by the second luminescent converter (2200) into second luminescent converter light (2201), and (b) transmit at least part of the first luminescent converter light (2101) received by the second luminescent converter (2200); wherein the second luminescent converter (2200) is configured in the transmissive mode; and (E) the light generating system (1000) is configured to generate system light (1001) comprising (a) first luminescent converter light (2101) transmitted by the second luminescent converter (2200) and (b) second luminescent converter light (2201).

The embodiment of the invention discloses a light source device which utilizes an integrated wavelength conversion device comprising a wavelength conversion area and a laser dissipation area, wavelength conversion of laser can be realized through the wavelength conversion area of the wavelength conversion device, and laser generated by a narrow-band light source can be dissipated through a laser diffusion area of the wavelength conversion device. A planar vibration device of an independent diffusion wheel or diffusion sheet is not needed, so that the speckle problem is effectively improved; and secondly, by adopting the light source device of the integrated wavelength conversion device, laser dissipation and laser fluorescence excitation are realized at the same time, a diffusion element does not need to be additionally arranged, the system size is reduced, and the cost is reduced.

To increase the volume for storing acquired sample tissue, thereby reducing or eliminating the need to remove an endoscope to empty a tissue retrieval device for another sample collection insertion iteration.SOLUTION: The surgical instrument includes an elongated body including a proximal end portion and a distal end portion, and a tissue separator coupled to the distal end portion and configured to engage a sample tissue for collection, wherein the tissue separator is at least partially made of a material that allows light to pass through the tissue separator. A method of collecting biological material using a tissue retrieval device includes inserting the tissue retrieval device into a patient's anatomy, guiding a tissue collector of the tissue retrieval device to a target tissue, viewing the target tissue through the tissue collector, and collecting biological material from the target tissue with the tissue retrieval device.SELECTED DRAWING: Figure 6B