8results about How to "Large divergence angle" patented technology

The invention relates to the field of integrated optical fiber microscopic endoscopy, in particular to an all-optical-fiber light beam modulation and collection system based on double super lenses and a design method of the all-optical-fiber light beam modulation and collection system. The system comprises a single-mode optical fiber, a coreless optical fiber for beam expansion and two super lenses (a super lens 1 and a super lens 2) with different functions. The super lens 1 is arranged on the end face of the fiber core of the single-mode optical fiber and focuses output exciting light to form extremely small waist spots, and the divergence angle of light beams is increased. The super lens 2 is arranged on the end face of the coreless optical fiber beam expanding area and used for refocusing the exciting light and focusing the collected fluorescence to the focus position of the super lens 1 at the same time, and the fluorescence is incident to the fiber core in parallel through the super lens 1. According to the invention, a double-super-lens system based on a high numerical aperture (NA) is fully utilized, wavefront modulation is carried out, the length of a beam expanding area is adjusted, and the loss of fluorescence in the beam expanding area is reduced, so that the collection efficiency of the fluorescence is remarkably improved, and an innovative solution is provided for the design of a super-lens-based optical fiber optical system.

The embodiment of the invention provides a light beam shaping device, a light beam shaping system and a light beam shaping method, and relates to the technical field of light beam shaping, and the light beam shaping device comprises a Powell prism and a light beam homogenizing element which are arranged in sequence. The Powell prism can receive an incident beam, adjust a light path of the Powell prism according to the refractive index and the geometrical shape of the Powell prism and shape the incident beam into a linear emergent beam, and the beam homogenizing element can further shape the beam and increase the divergence angle of the emergent beam, so that the divergence angle of the emergent beam is an obtuse angle. And the light beams can be modulated by utilizing optical effects such as scattering and interference, so that uniform distribution of the light beams is realized.

The invention discloses a reflection mode fluorescence conversion white light source for communication and illumination, and belongs to the field of visible light communication and solid-state illumination. The divergence angle, the modulation bandwidth, the color rendering index, the angle color uniformity and the thermal stability of the white light source are remarkably improved, and the overall performance of a visible light communication and solid-state lighting system is enhanced. The specific implementation method comprises the following steps: 1, adjusting parameters such as fluorescence conversion material concentration and glass cavity thickness according to light source performance requirements; the cesium lead bromide and the cadmium selenide / zinc sulfide are respectively excited by 450nm laser to radiate 521nm light and 632nm light. And 2, fixing the fluorescence conversion material on the reflecting surface of the reflecting mirror so as to improve the transmitting power of the light source. Backward radiated 521nm and 632nm light and unconverted residual 450nm light are reflected by the reflecting mirror and are combined with forward radiated light to generate a white light beam. Thirdly, a radiator is assembled on the back face of the reflector, and the thermal stability of the system is improved. The method is not only suitable for the fields of visible light communication and solid-state illumination, but also provides important technical support for various related applications such as intelligent illumination and indoor wireless communication.

The utility model discloses a kind of laser module of emission irregular starry sky effect, belong to semiconductor laser application technical field, including laser window mirror, light-reflecting concave mirror, light-reflecting bowl, multi-mirror, light source driving board, laser light source module, power module, 512 public seat female seat, 512 subboard module, waterproof rubber pad, pressboard, waterproof joint, load lifting eye, mounting bottom plate, heat dissipation module, rear panel, front panel, product nameplate slot, boom connecting block, boom, shock pad foot and starry sky lamp cylinder, the light-reflecting concave mirror has light-reflecting concave, the light-reflecting bowl is spherical crown, and several plane mirrors are equipped in its light-reflecting concave, the light-reflecting bowl is parallel with multi-mirror and is obliquely arranged in the front of laser light source module, the utility model has the technical effect that irregular and dynamic change starry sky light spot can be generated, light utilization is high, structure is stable, installation is flexible and has good waterproof heat dissipation performance.

This application discloses a transmission-type high-power laser emitting system, relating to the technical field of high-power laser systems. The system's laser incident end is connected to a high-power fiber laser for receiving the laser beam, and its laser emitting end is used to focus the laser beam to a target location. The system includes a laser emitting mirror group, an emitting mirror tube, a focusing motor, and a control circuit board. The laser emitting mirror group is disposed inside the emitting mirror tube and includes a laser emitting eyepiece group and a laser emitting objective lens group. The laser emitting eyepiece group is located at the incident end, and the laser emitting objective lens group is located at the laser emitting end. The focusing motor is used to move the laser emitting eyepiece group through a mechanical connector to achieve system focusing. The control circuit board is used to control the focusing motor to rotate and focus according to a focusing signal. The technical solution of this application has a simple system structure, relatively high temperature stability, and can achieve directional focusing of a high-power laser beam over a long distance.

The application provides an optical path and a target red light photophthalmometer, and relates to the technical field of photophthalmometers.The optical path comprises an LED light source, a first light shielding element and a second light shielding element arranged in sequence along an optical path.The first light shielding element is provided with a first light transmission hole for narrowing light emitted by the LED light source into an object light spot.The distance between the second light shielding element and the first light shielding element is greater than the distance between the second light shielding element and an eye.The second light shielding element is provided with an imaging hole coaxial with the first light shielding element, the imaging hole is used for changing the object light spot into an image light spot in the form of pinhole imaging, and the divergence angle of the image light spot is smaller than the divergence angle of the object light spot.

The invention discloses an aluminum foil pinhole detection device and method based on high-speed laser. The aluminum foil pinhole detection device comprises a high-precision laser, a radar sensor and a microlens array, wherein the high-precision laser and the radar sensor are distributed at intervals, and the microlens array is arranged between the high-precision laser and the radar sensor. The adjusting part is used for adjusting the positions of the high-precision laser and the radar sensor and comprises a fixed seat, an adjusting groove formed in the fixed seat, a plurality of threaded openings symmetrically formed in the side surface of the fixed seat and two connecting seats inserted into the adjusting groove and sliding in the adjusting groove, and fastening plates are arranged on the front surfaces of the two connecting seats; the beneficial effects of the invention are that light emitted by a traditional light source is propagated along all directions, the divergence angle is large, aluminum foils with different thicknesses and pinholes with the same size can be caused, and the detected hole areas have great differences; the divergence angle of the laser light source is very small, the laser light source is almost emitted along the parallel direction, and the detected hole areas of aluminum foils with different thicknesses and pinholes with the same size are consistent.

The invention discloses a transmission-type high-power laser emission system, and relates to the technical field of high-power laser systems, a laser incident end of the system is connected with a high-power fiber laser and is used for accessing a laser beam, and a laser emergent end is used for converging the laser beam to a target position. The system comprises a laser emission lens group, an emission lens cone, a focusing motor and a control circuit board, the laser emission lens group is arranged in the emission lens cone and comprises a laser emission eyepiece group and a laser emission objective lens group, the laser emission eyepiece group is located at an incidence end, the laser emission objective lens group is located at a laser emission end, and the focusing motor is located in the laser emission lens cone. The focusing motor is used for moving the laser emission eyepiece group through the mechanical connecting piece to realize system focusing, and the control circuit board is used for controlling the focusing motor to rotate for focusing according to a focusing signal; according to the technical scheme, the system is simple in structure, the temperature stability is relatively high, and the long-distance light beam directivity convergence function of high-power laser can be achieved.