30results about How to "Optical performance impact" patented technology

The invention relates to a method for preparing a water absorbent anti-fog film used for automotive glass. The method comprises the following steps: step 1, preparing water absorbent resin from raw materials in parts by weight as follows: adding 10-40 parts of resin containing water absorbent groups and 10-50 parts of crosslinkable cured resin to 50-100 parts of organic solvents, mixing up, adding 20-60 parts of curing agent and 1-5 parts of flatting agent. mixing up and obtaining the water absorbent resin; step 2, preparing the anti-fog film: sequentially degreasing the surface of the automotive glass with the organic solvent, performing mechanical polishing, rinsing with tap water and distilled water respectively, and desiccating; performing surface coating on the clean and dry automotive glass with the water absorbent resin prepared according to the step 1, and placing the water absorbent anti-fog film at a temperature of 80-150 DEG C for 0.5-4h after the leveling of the water absorbent anti-fog film. The water absorbent anti-fog film provided by the invention can absorb and desorb steam without creating fog on the glass, and has a long-term anti-fog function.

The invention belongs to the polymer optical waveguide and micro fluidic channel integrated chip preparation technical field, and relates to a micro fluidic channel, mask, optical waveguide preparation and end face treatment method which concretely comprises: employing a nanoimprint (hot imprinting or ultraviolet imprinting) method to prepare micro fluidic grooves on a polymer substrate; a carbon dioxide laser cutting and penetrating injecting holes; evaporating an aluminum mask on a chip; spin coating photoresist; performing overall exposure and development to obtain a waveguide mask graph; utilizing a photosensitive polymer to prepare an optical waveguide core layer film on another substrate of the same material with a micro fluidic layer; performing hot imprinting packaging on two layers of chips; employing an upper layer micro fluidic chip as a photomask after packaging; writing in slab waveguide on a photosensitive polymer core layer film, wherein the waveguide is directly located under a micro fluidic channel, thereby avoiding register errors between the upper layer chip and a sensing window in an integration process; cutting a sample end face through laser, and completing an optical waveguide and micro fluidic registration-free integrated chip after polishing.

The invention discloses a doping modification method for a CVD (Chemical Vapor Deposition) ZnS crystal material. The doping modification method comprises the following steps: before deposition, adding a metal M into a zinc crucible, or an alloy Zn-M of M and zinc as a doping agent, performing heating melting, and uniformly mixing so as to obtain an M-doped zinc raw material; further performing chemcial vapor deposition, after deposition is completed, performing constant-temperature constant-pressure thermal treatment, thereby improving the mechanical and mechanical properties of the CVD ZnS crystal material. By adopting the method, on premise that the infrared permeation property of the CVD ZnS crystal material is not remarkably affected, the effect of improving the mechanical property of the CVD ZnS is achieved, the mechanical properties of the CVD ZnS crystal material are improved, the mechanical strength of the CVD ZnS crystal material is improved, the corrosion resistance and the thermal impact resistance is improved, and the method is applicable to on-scale production and commercial application.

The invention discloses a quantum dot light emitting diode. The quantum dot light-emitting diode comprises a cathode, an anode and a quantum dot light-emitting layer arranged between the cathode and the anode, and a functional layer is arranged between the cathode and the quantum dot light-emitting layer; the functional layer comprises n layers of functional structure units which are arranged in astacked mode, wherein the functional structure unit is composed of an electron blocking material layer and an electron transmission layer which are arranged in a stacked mode, the electron blocking material layer in the functional structure unit is arranged close to the quantum dot light-emitting layer, the electron transmission layer in the functional structure unit is arranged close to the cathode, and n is an integer larger than or equal to 1. According to the quantum dot light-emitting diode, the transmission rate of electrons transmitted to the quantum dot light-emitting layer can be reduced through the arrangement of the functional layer, so that the injection rate of the electrons and holes is balanced, the recombination efficiency of carriers in the quantum dot layer is improved,the light-emitting efficiency and stability of the quantum dot light-emitting diode are improved, and the service life of the quantum dot light-emitting diode is prolonged.

The invention belongs to the field of electrowetting, and discloses an electrowetting device. The electrowetting device includes an upper substrate and a lower substrate; a cavity formed by the opposite upper and lower substrates is filled with encapsulation liquid; the upper substrate includes an upper support plate, a first electrode, a sealing plastic frame and support columns; the lower substrate includes a lower support plate, a second electrode, a hydrophobic insulation layer and a pixel wall. The invention further discloses a preparation method of the electrowetting device. According to the electrowetting device, the support column structure is arranged on the upper substrate, which is different from other electrowetting devices of which support columns are arranged on the lower substrate, the support column on the upper substrate can be subjected to several kinds of physical and chemical hydrophilic modifications, so that the support column achieves the conditions of super hydrophilicity and super oleophobicity, and therefore the influence of the support column on ink movement is greatly reduced.

The invention discloses a preparation method for improving the ultraviolet resistance of contact lenses through an ultraviolet absorbent agent. The preparation method involves, by weight, 90-98.8% ofcontact lens monomer mixed liquid with HEMA as a main base material, 0.2-2.5% of the ultraviolet absorbent agent, 0.3-1.0% of an initiator and 0.7-0.9% of a cross-linking agent. The preparation methodhas the advantages that 1, by using a proper amount of the ultraviolet absorbent agent 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl methacrylate in the contact lens mixed material, so that the contact lenses prepared by using the method are high in ultraviolet resistance; the contact lenses prepared by using the method has high ultraviolet resistance, but has no influence on the lens opticalperformance in the visible region; the preparation method for improving the ultraviolet resistance of the contact lenses is simple in preparation process and low in production cost.

The invention discloses a method for preparing YAG (yttrium aluminum garnet)-based transparent ceramic by direct writing. The method comprises the following steps: ball-milling and mixing an organic solvent, a dispersing agent A, a sintering aid and ceramic powder, drying, sieving with a 100-mesh sieve, a 200-mesh sieve and a 500-mesh sieve, and calcining to obtain raw material powder; the 500-mesh calcined powder, a polyelectrolyte dispersing agent and deionized water are subjected to ball milling and mixing, and slurry B is obtained; the 100-mesh calcined powder, 3-8 wt% of PVP aqueous solution and a dispersing agent B are subjected to ball-milling mixing, then the 200-mesh calcined powder is added, ball milling is continued, and slurry C is obtained; the slurry C and the slurry B are subjected to ball milling mixing according to the mass ratio of 3.5-5.5; vacuum defoaming, direct writing forming and glue discharging are carried out; and carrying out vacuum sintering, annealing and processing on the biscuit subjected to glue removal to obtain the YAG transparent ceramic. The YAG-based ceramic biscuit prepared by the method does not need cold isostatic pressing and warm isostatic pressing, controllable preparation of a transparent ceramic material with a composite structure and a complex shape is realized at the same time, the product preparation speed is high, the yield is high, and the application prospect is good.

The invention discloses a projection screen and a projection device, relates to the technical field of projection display, and is used for solving the problem of poor ambient light resistance of a projection screen in the prior art. The projection screen comprises a surface layer, a polaroid layer, a Fresnel lens layer and a reflecting layer which are stacked. The polaroid layer is configured to transmit linearly polarized light in a preset polarization direction. The projection screen is used for displaying images projected by the projector.