9results about How to "Improve light collection efficiency" patented technology

The invention belongs to the technical field of fundus imaging, and discloses an ultra-wide-angle ellipsoid confocal laser scanning fundus imaging system, which comprises a light splitting module, a light condensing module, a scanning module, a transmitting mirror group, an ellipsoid reflector and a detection module, wherein the center of the scanning module and the center of the transmitting mirror group are located on the same optical axis A, the pupil of the human eye is located at the first focus of the ellipsoidal reflector, and the entrance pupil of the transmitting mirror group is located at the second focus of the ellipsoidal reflector; and the transmitting lens group comprises a movable focusing lens and is used for changing the position of a first image surface of light reflected by the retina of the human eyes when moving along the optical axis A so as to realize clear imaging of the retina of the human eyes with different diopters. Under the condition that a free-form surface is not introduced, ultra-wide-angle multi-wavelength confocal laser scanning fundus imaging with the single intraocular field angle of 200 degrees is achieved, and the full-field optical resolution reaches 15 micrometers. And by moving the focusing lens, imaging compensation can be carried out on human eyes with diopters of-15D to + 15D.

The invention discloses a distinguishing table type X-ray spectrometer and an X-ray absorption spectrum testing method, and relates to the technical field of spectral measurement. The high-resolution table type X-ray spectrometer comprises a sample signal source which is located in a Dowland circle and is used for generating X-rays; the exponential crystal is a bent crystal, the surface shape of the exponential crystal is defined by an exponential equation, so that different points on the curved surface of the crystal have different curvature radiuses and correspond to Rowland circles with different radiuses, each point on the exponential crystal is tangent to the corresponding Rowland circle, and the exponential crystal is used for performing monochromatization and focusing on the X-ray incident from the sample signal source; and the detector is positioned on a surface formed by the corresponding imaging points on each Rowland circle, and is used for receiving the X-rays which are monochromatized and focused by the index crystal and outputting corresponding light intensity signals. Therefore, through the cooperation of the index crystal and the multi-Rowland circle structure, the X-ray absorption spectrum test with high light receiving efficiency, high spectral resolution and wide energy spectrum range can be realized, and the comprehensive performance of the desk type spectrometer is improved.

The invention relates to the technical field of optics and relates to an objective lens. The four lens groups are arranged to form a double-telecentric optical system, and optimization and correction of spherical aberration, coma, chromatic aberration, astigmatism, telecentricity and distortion of incident laser beams are achieved through the four lens groups. According to the invention, ultraviolet wavelength high-resolution imaging can be satisfied, high light collection efficiency can be ensured, and weak ultraviolet imaging and a large imaging field of view can be realized.

The invention discloses a GO-coated P-g-C3N4 composite material containing AgNPs and a preparation method of the GO-coated P-g-C3N4 composite material. The preparation method comprises the following steps: preparing a graphene oxide solution, preparing a graphene oxide nano-silver composite solution, preparing protonated graphite phase carbon nitride, and preparing the GO-coated P-g-C3N4 composite material containing AgNPs. According to the GO coated P-g-C3N4 composite material containing the AgNPs, disclosed by the invention, the defects of g-C3N4 are overcome. The two-dimensional / two-dimensional (2D / 2D) heterostructure can promote charge transfer and form an excellent coupling interface due to inherent resistance, a short transmission path, a large surface area and tight contact, so that photon-generated carriers are easier to separate. In addition, the structure exposes abundant reaction sites, the photocatalytic activity is improved, agglomeration and photocorrosion phenomena are reduced, and the efficiency and stability of the photocatalyst are improved.

The utility model discloses a liquid crystal display component with a photocell, which comprises a display screen body, a photocell body is arranged at the upper part of the display screen body, a functional layer is arranged on the upper surface of the photocell body, and a plurality of light receiving grids with irregular structures are arranged on the functional layer. And the light receiving grids are transparent. Compared with a traditional regular rhombic grid, the light receiving grid with the irregular structure on the functional layer is utilized, so that moire fringes generated by interference between an RGB dot matrix of a display screen and a photocell wire are greatly reduced, the light energy conversion performance of the light receiving grid is improved, and the photoelectric conversion efficiency of the photocell body is improved.

This invention relates to the field of nanoscale full-spectrum photocatalytic materials, and particularly to a method for preparing a molybdenum selenide / oxygen-deficient bismuth oxybromine@gold three-phase Z-type heterojunction photocatalyst. This method solves the problems of low photogenerated electron-hole separation efficiency, narrow full-spectrum response range, and poor stability in existing bismuth-based photocatalysts. The preparation method involves first preparing oxygen-deficient BiOBr nanospheres via a solvothermal method, then directly reacting tetrachloroauric acid with oleylamine in toluene to prepare small-particle-size monodisperse Au nanoparticles, which are then combined with oxygen-deficient BiOBr to prepare a BiOBr@Au nanosphere core-shell structure. Finally, a MoSe2 / oxygen-deficient BiOBr@Au three-phase composite material is prepared via a hydrothermal reaction. The catalyst of this invention exhibits absorption capacity under the full spectrum of light, and simultaneously achieves a synergistic enhancement of carrier separation efficiency and strong redox capability, demonstrating excellent photocatalytic activity and the ability to efficiently degrade pollutants and produce hydrogen.

This application provides a stacked optocoupler packaging structure and its fabrication method, belonging to the field of optoelectronic semiconductor packaging technology. The structure includes: an emitter lead frame, an infrared chip, a receiver lead frame, and a photosensitive chip; the infrared chip is flip-chip bonded to the emitter lead frame; the photosensitive chip is bonded to the receiver lead frame; the emitter and receiver lead frames are stacked vertically; a Fresnel focusing lens is positioned above the photosensitive chip and bonded to it with an adhesive; a packaging shell is composed of a transparent inner potting compound layer and a black outer potting compound layer, formed sequentially by molding. The packaging shell encapsulates the emitter assembly, receiver assembly, and Fresnel focusing lens, and exposes some pins of the emitter and receiver lead frames. This application achieves high isolation voltage, reduces packaging size, improves photoelectric conversion efficiency, enhances long-term reliability, and simplifies the manufacturing process.

The utility model discloses a light source system, which comprises a light-emitting component, a collimating lens component, a dodging lens component, a converging lens component, an off-axis rotating mechanism, a support frame component and a driving component, wherein the collimating lens component, the dodging lens component and the converging lens component are sequentially arranged along the light emitting direction of the light-emitting component; the driving assembly is used for driving the off-axis rotating mechanism to enable the collimating lens assembly to move relative to the light-emitting assembly, the light-emitting assembly comprises a light-emitting body group, the light-emitting body group at least comprises a first light-emitting body group and a second light-emitting body group, and the light-emitting body group at least comprises a first light-emitting body and a second light-emitting body. The placing angles of the second luminous bodies in the first luminous body group and the second luminous bodies in the second luminous body group are different; the dodging lens assembly comprises a first fly's-eye lens and a second fly's-eye lens, and the gap distance between the first fly's-eye lens and the second fly's-eye lens is 0-0.7 mm. The light source system can realize diversification of light emitting modes, and is high in light emitting efficiency and good in optical effect.

The present invention discloses a modular trough light collector and a structural optimization method thereof, comprising a main support structure, a thin film concentrator, a photovoltaic cell array and a power transmission device; the main support structure is a concave arc frame structure, two end reinforcement trusses are arranged at both ends of the main support structure, and the free ends of the two end reinforcement trusses intersect at the axis of the main support structure; a plurality of thin film concentrator arrays are arranged on the inner wall of the main support structure; the photovoltaic cell array is located in the concave area of ​​the main support structure, the photovoltaic cell array includes a plurality of photovoltaic cell panel units, and the plurality of photovoltaic cell panel units are arranged to form a total cell array, and there is an angle between adjacent rows of photovoltaic cell panel units, so that the cross section of the total cell array is a curve; the power transmission device is coaxially connected between the end of the photovoltaic cell array and the free end of the end reinforcement truss. The light collector of the present invention has high light collection efficiency, realizes light collection and conversion at the same time, makes the system easy to expand, and reduces the difficulty of processing and manufacturing.