37 results about "Flattop" patented technology

The invention provides a VCSEL array, a manufacturing method, a flat-top far-field generation method, and an illumination module. Compared with the traditional VCSEL array, a uniform flat-top far-field can be easily realized without installing optical elements such as a diffuser. field, thereby significantly reducing the cost of the array and the corresponding modules while meeting the needs of TOF measurement. At the same time, due to the cancellation of the diffuser, the corresponding parts such as the side wall column and the diffuser cover are also omitted, so that the thickness of the module is significantly reduced, and it has many beneficial effects that are not available in the prior art.

The invention provides a manufacturing method and system of an inverted truncated rectangular pyramid / rectangular pyramid shaped anti-reflection micro-nano structure. The system comprises a femtosecond laser system, a light path transmission system, a rectangular flattop shaping unit and a high-rate focusing microobjective. The method comprises the steps of dividing an inverted truncated rectangular pyramid / rectangular pyramid into n layers according to the optimal manufacturing focus depth of the system, calculating the size of the layer surface of each layer, adjusting the system to enable the focal plane of the system to be located at h / 2 position of the first layer of the inverted truncated rectangular pyramid / rectangular pyramid and conducting processing on the layer through shaping gathered rectangular flattop light; and conducting processing in this way until processing of the nth layer is completed. Through the manufacturing method and system of the inverted truncated rectangular pyramid / rectangular pyramid shaped anti-reflection micro-nano structure, the problems of poor shape control capability and limited processing capability in the prior art are solved; processing is conducted in sequence according to the sizes of the layer surfaces to obtain the anti-reflection micro-nano structure with the micromicron-scale depth, and the anti-reflection rate of the anti-reflection micro-nano structure is improved; processing is conducted through light spot shaping according to the sizes of the layer surfaces, and the shape control capability of anti-reflection micro-nano processing is improved; and processing is conducted from top to bottom, and the processing depth-diameter ratio is larger.

The invention discloses a construction method for excavating a station structure by first tunneling and then station pipe curtain hole pile method. During construction, four pilot tunnels are respectively arranged on the upper and lower floors, wherein there is a leading pilot tunnel in the upper layer pilot tunnel, and the preceding pilot tunnel is used to excavate the station structure. As the working space for the installation of pipe curtains, there is no pipe curtain support above the first pilot tunnel and the four lower pilot tunnels, and the primary support is provided with a vaulted straight wall structure. The pilot tunnels are used as side piles and central steel pipe columns. Space, after the installation of the pipe curtain is completed, the remaining three upper pilot holes on the upper floor will be excavated with a flat roof and straight wall structure. It is also suitable for the excavation of shallow and deep buried stations, which ensures that the environmental facilities are almost unaffected, and thus saves economic costs. It has strong economic benefits and social value, and can be widely used in similar projects.

The invention relates to a miniature laser capable of outputting uniform polarized light and a preparation method thereof. The laser comprises a P-surface electrode, a P-surface distributed bragg reflector, an N-surface distributed bragg reflector, a substrate layer and an N-surface electrode, wherein metal grating of sub-wavelength is manufactured on the surface of the P-surface distributed braggreflector; the metal grating is connected with the P-surface electrode, and the period of the metal grating is smaller than the wavelength of a vertical cavity surface emitting laser; the surface ofthe substrate layer is a spherical surface; and a DOE layer is etched in one side, towards the N-surface electrode, of the substrate layer. According to the laser, a beam shaping system is not needed,and the flat top polarized light can be output by only needing process design and the using the device characteristics; and in addition, the laser has the advantages of simple structure, small and compact size, low manufacturing cost, and can be highly integrated in some equipment, and has very important application prospect.

This invention relates to thin-band thermal optical adjusting Fabry-Perot filter, which comprises the following parts: one base; one distributing Prague reflector processed on the base; one Fabry-Perot chamber process on the upper surface on the down distributing Prague reflector; one heater processed on the Fabry-Perot chamber; one upper distributing Prague reflector processed on the heater surface; one transparent window formed on the middle of the heater.