3results about How to "Lower average reflectance" patented technology

The invention discloses a polar axis type turntable system carrying an optical mirror surface and a method and belongs to the technical field of optical equipment. In the prior art, a laboratory light path is controlled by manual adjustment, human errors are easily introduced, and the stability is poor. In the polar axis type rotary table system carrying the optical mirror surface, a two-dimensional reflector assembly is fixed on the upper side of a connecting plate, an area light source generator is located on the upper portion of a laboratory, a light source receiver is arranged at a certain height of a test bed on the right side of the two-dimensional reflector assembly, and a ball screw driving device and a guide rail are located at the bottom of the connecting plate and can move in the laboratory in a one-dimensional mode. The two-dimensional reflecting mirror assembly forms a precise two-dimensional rotating platform, and a reflecting light path is automatically tracked according to a control method of the two-dimensional reflecting mirror assembly. The device has universality in application scenes, and due to the unique closed-loop feedback control mechanism and the method of combining the area light source generator with the lead screw sliding rail, a light path has higher stability and accuracy.

The invention discloses a polytetrafluoroethylene-based antireflection film suitable for terahertz band 35μm-36μm and a preparation method thereof, wherein the antireflection film is composed of a polytetrafluoroethylene-based substrate and a poly-4-methyl-1-pentene film layer on its surface, and the preparation method is to generate the poly-4-methyl-1-pentene film layer on the surface of the polytetrafluoroethylene-based substrate by ion sputtering coating. Compared with the existing antireflection film, the antireflection film not only reduces the number of film layers, but also simplifies the polytetrafluoroethylene-based substrate material, and the antireflection film has a higher average transmittance in the 35μm-36μm band, a lower average reflectivity, and has better hardness and wear resistance, and can prevent the antireflection film from being easily scratched during use.

The utility model relates to photovoltaic cell technical field, especially a kind of high-efficiency BC photovoltaic cell of multilayer passivation structure, comprising: outer AlOx layer, composite passivation layer and cell panel, the front of the cell panel is deposited with composite passivation layer, composite passivation layer front is deposited with outer AlOx layer, outer AlOx layer is matched with composite passivation layer, and the average reflectivity of light with wavelength in 300-1200nm range is reduced by 3-5%.