5results about How to "Reduce coherence" patented technology

The present application relates to a kind of new near hemispherical probe and its preparation method, the near hemispherical probe can retain the excellent electrical characteristics of three-dimensional spherical structure, the area of collection electrode is small under the same electrode spacing, and the capacitance is low, and charge collection efficiency is almost independent of θ.Hemispherical electrode has good sealing, completely isolates detection sensitive area from substrate, dark current is not affected by wafer thickness, and extremely low noise is conducive to low-energy X-ray or low-energy particle detection.

The utility model relates to the technical field of cultural education supplies, and discloses a loose-leaf type point-reading scratch book which comprises a picture frame plate, loose-leaf binding of a scratch base layer plate is achieved through binding rings at the top of the picture frame plate, compared with a traditional fixed binding scratch book, when a certain page is damaged or used up, the loose-leaf type point-reading scratch book can be replaced easily, resource waste is reduced, and the cost is reduced. The scraping pen containing groove formed in the outer wall of one side of the picture frame plate is matched with the spring and the arc-shaped clamp to form a scraping pen clamping structure, the problems that a scraping pen of a traditional scraping picture is prone to being lost and inconvenient to take and use are solved, the scraping picture pattern covering layer and the voice button are integrated on the top of the scraping picture base plate, and the scraping picture creation function and the point reading function are integrated; the loose-leaf type point-reading scratch book has the advantages that the problem of complicated operation caused by separation of traditional point-reading equipment and a scratch book is avoided, the continuity and interestingness of learning creation are enhanced, the loose-leaf type point-reading scratch book is ingenious in structure and high in practicability, defects of traditional products are effectively overcome, and the loose-leaf type point-reading scratch book has good market application prospects.

The application relates to a speckle-eliminating laser projector, which comprises a plurality of laser light sources, a light mixing assembly, a speckle-eliminating sheet, a projection chip and a projection lens arranged along a light path in sequence, the laser light sources are used for emitting RGB light, the light mixing assembly is used for mixing the RGB light into white light, the speckle-eliminating sheet is used for eliminating the speckle of the white light, the speckle-eliminating sheet is formed by splicing a plurality of light adjusting units, and the speckle-eliminating sheet comprises an incident light surface, and the incident light surface is formed with array-arranged microlenses. The application helps to improve the imaging effect of the laser projector.

The invention discloses a light source device and an optical imaging system. The first laser light source comprises a first laser module and a second laser module, the first laser module is used for generating first laser, and the second laser module is used for generating second laser. The second laser light source comprises a third laser module and a fourth laser module, the third laser module is used for generating third laser, and the fourth laser module is used for generating fourth laser. The first polarization light combination module is arranged on a light path where the first laser and the third laser are located and used for generating first mixed light. The second polarization light combination module is arranged on the light path where the second laser and the fourth laser are located and used for generating second mixed light. The wavelength light combination module is arranged on a light path where the first mixed light and the second mixed light are located. According to the light source device in the embodiment, light combination is conducted on multiple paths of laser in the mode that polarization light combination is conducted firstly and then wavelength light combination is conducted, light spots of finally generated emergent light can be small, and the design difficulty and hardware cost of elements in a follow-up light path are reduced.

The application provides a partial-coherence vortex beam topological charge measuring device and method based on light intensity analysis, which comprises the following steps: a solid laser emits laser light; a linear polarizer selects horizontal direction polarized light; a first lens focuses the polarized light; a frosted glass scatters the focused light to obtain incoherent light; a second lens collimates the partial-coherent light; a Gaussian filter shapes the collimated light to obtain a Gaussian Schell mode beam; a spatial light modulator modulates the Gaussian Schell mode beam to obtain a first Gaussian Schell mode vortex beam; a screening unit screens the first Gaussian Schell mode vortex beam to obtain a second Gaussian Schell mode vortex beam; a fifth lens focuses the second Gaussian Schell mode vortex beam to obtain a third Gaussian Schell mode vortex beam; and a charge-coupled device collects the light intensity diagram of the third Gaussian Schell mode vortex beam, and the size and sign of the topological charge are obtained according to the light intensity diagram. The size and sign of the topological charge of the Gaussian Schell mode vortex beam are analyzed through the light intensity diagram.