40results about How to "Reduce optical power loss" patented technology

A uniform light spot surface scanning device of a laser cleaning machine comprises a laser output module (10), a gauss-flat top system, a gradually-changing rotating polygonal mirror (50), a drive motor (60) and a collimation focusing lens (70). The gauss-flat top system redistributes the energy of a gaussian laser beam emitted by the laser output module (10) and compresses the diameter of the laser beam at the same time, so that a laser beam with uniform energy is formed; the laser beam irradiates the gradually-changing rotating polygonal mirror (50); the gradually-changing rotating polygonal mirror (50) is driven by the drive motor (60) to rotate so as to make the laser beam form a space angle scanning beam; the space angle scanning beam is refracted by the collimation focusing lens (70) and then forms surface light spots on an object (80) to be cleaned.

A WDM multiplexing/demultiplexing system includes a de-multiplexer configured to separate and guide light beams from an incident ray having a plurality of wavelengths to corresponding lenses on an optical device, a multiplexer configured to guide light beams from optical transmitters having various wavelengths through the corresponding lenses on the optical device and combine the light beams, a lens array including the corresponding lenses to receive and/or transmit the light beams from or to the de-multiplexer and multiplexer, and a light beam collimator configured to function with the multiplexer and de-multiplexer. The light beams received or transmitted by the light beam collimator and the light beams transmitted or received from or to the multiplexer and de-multiplexer are collinear. The light beam collimator and multiplexer/de-multiplexer can be easily positioned to predetermined or designed positions, thereby providing light beams output through the lenses in a plastic optical device. The WDM system advantageously reduces optical signal loss, while increasing the assembly yield.

A dispersion compensation fiber comprises a fiber core and cladding. The fiber core is a core layer mainly doped with germanium and having a positive relative refractive index difference. The cladding covering the fiber core comprises a trench cladding mainly doped with fluorine, an annular cladding mainly doped with germanium, a matching cladding mainly doped with fluorine, and an outermost mechanical cladding in order. Relative refractive index differences of the fiber core and the claddings are respectively: Δ1% being 1.55% to 2.20%, Δ2% being −0.55% to −0.30%, Δ3% being 0.40% to 0.65%, Δ4% being −0.20% to −0.01%, and Δ5% being 0. Radius ranges, from R1 to R5, of the fiber core and the claddings are respectively: R1 being 1.4 to 1.7 μm, R2 being 4.1 to 4.8 μm, R3 being 6.7 to 8.8 μm, R4 being 10 to 17 μm, and R5 being 38 to 63 μm.

The invention provides an FTTH (fiber to the home) quick laying system multi-user light distribution unit device which comprises an optical cable, optical terminal boxes, an optical fiber moving connector and tail fibers. The optical cable is used for connecting the tail fiber at one end of the optical cable with the optical terminal boxes, the optical terminal boxes are clamped on the optical cable and connected with an optical fiber in the optical cable and serve as connecting equipment for home-entry fiber jumping during home-entry starting, and an optical fiber adapter is arranged in each optical terminal box; the tail fibers are used for being inserted into a fiber distribution box and are uniform to the optical terminal boxes in number. The multi-user light distribution unit device is used for connecting the optical fiber distribution boxes with user optical modems. Through the technical scheme, FTTH construction steps are simplified, and a project line which is short in overhead construction period, convenient to construct, time-saving, labor-saving and low in optical power loss can be realized.

The invention discloses refractive index matching liquid which includes the following raw materials, by weight, 1-99.9 parts of glycerol and 0.1-99 parts of surfactant. According to the refractive index matching liquid, the glycerol is used as a base solution and the surfactant is used as adjuvant. Therefore, the refractive index matching liquid is good in stability and fluidity, small in surface tension, low in cost, easy to manufacture, and good in using effect.

A beam-splitting integrated optical element including a shell, at least one first lens, and at least one second lens is provided. The shell includes a first lens surface, a second lens surface, at least one first reflective surface, and at least one second reflective surface. A bottom edge of each first reflective surface and a bottom edge of each second reflective surface are not connected to each other. The at least one first lens is disposed on the first lens surface. The at least one second lens is disposed on the second lens surface, and each second lens has a second optical axis. Each second reflective surface is located at at least one side of the corresponding second optical axis and located on a transmission path of only a portion of a first beam. An optical transmitter module incorporating said beam-splitting optical element is also provided.

The invention discloses a preparation method for a copper base material photovoltaic welding strip. The preparation method is characterized by specifically comprising the following steps of (1) carrying out cleaning treatment on a copper base material by adopting an acidic solution, and removing dirt and impurities on the surface of the copper base material; (2) carrying out plasma treatment on the surface of the copper base material; (3) depositing a bottoming alloy layer on the surface of the copper base material in a vacuum manner; and (4) adopting a brush electroplating process to carry out brush plating on the surface of the bottoming alloy layer with a layer of solder in order to obtain a finished copper base material photovoltaic welding strip product. The prepared copper base material photovoltaic welding strip is uniform in thickness, flat in surface and good in mechanical property, the resistivity of the welding material serving as a photovoltaic module battery piece is low,and the light absorption power loss of a photovoltaic module can be effectively reduced.

The invention discloses a transmitting and receiving separated laser radar optical system, and belongs to the field of laser radar optics. The laser light source emits laser, the laser is shaped and collimated through the beam shaping module, then reflected to the projection unit through the polarization transmission and reflection module, reflected again and then transmitted through the polarization transmission and reflection module, the scanning angle is increased under the effect of the view field expansion unit, and the laser is emitted to a detection target, and then an echo light signal is reflected, the echo optical signal is projected to a photosensitive surface of the photoelectric detector through the convergence unit and the optical filter and is subjected to photoelectric conversion to generate an electric signal, distance information is calculated through time comparison of subsequent data processing and signal emission, and distance information of a target object in a scanning view field range is obtained by combining a scanning angle of a laser beam. Two-dimensional line scanning detection can be achieved by adopting the one-dimensional scanning micro reflecting mirror, and three-dimensional space detection can be achieved by adopting the two-dimensional scanning micro reflecting mirror.

The invention discloses a multi-layer conductive transparent film and a method for increasing the light emitting efficiency of light emitting devices. The method comprises the steps of: growing a transparent electrode layer with a high refraction coefficient and an indium tin oxide (ITO) transparent electrode layer from inside to outside in sequence on an epitaxial wafer on a P-type gallium nitride (GaN) surface, wherein the refraction coefficient n of the transparent electrode layer is more than 2.0; and growing the transparent electrode layer by chemical vapor deposition or physical vapor deposition, making each of monomer electrodes into a microsphere or cone shape, and forming all transparent electrodes with high refraction coefficients into periodically arranged arrays by a photolithography-etching method, a selective growth method, a sol-gel method or a self-assembly method. Therefore, the light emitting efficiency of photoelectric devices is increased without the reduction of the electric properties of the photoelectric devices.

The invention discloses a flexible optical fiber cable which comprises a cable core, at least one optical fiber layer located outside the cable core and a protective layer located outside the optical fiber layer; the optical fiber layer is formed by spirally winding a wire outside the cable core, and the wire is an optical fiber or comprises an optical fiber. On one hand, the bending resistance of the optical fiber can be improved, the optical fiber is not easy to break when being bent; and on the other hand, the winding distance can be regulated, and the optical power loss of the optical fiber is ensured to be minimum.