68results about How to "Improve optical quality" patented technology

The invention discloses a KDP crystal surface supersaturation simulation calculation method based on UDS, which relates to the technical field of crystal growth numerical simulation, and comprises: establishing a physical geometric model of a crystal growth groove, meshing the physical geometric model, and then importing it into Fluent simulation software; based on a user-defined scalar equation UDS, coupling fluid turbulence and energy equations, establishing a solute transport equation of a KDP crystal growth system; based on a KDP crystal surface solute reaction boundary condition, writing a user-defined function UDF, and based on a user-defined storage UDM, storing the equilibrium concentration of a KDP solution, mounting a custom function of equilibrium concentration varying with temperature, thereby constructing a self-consistent function of crystal surface growth rate; coupling the established equations and functions, establishing a mathematical model of the KDP crystal growth system, setting a calculation domain condition and a boundary condition of the mathematical model, and calculating and solving to obtain the supersaturation distribution of the KDP crystal growth system.

The invention discloses inner-layer quartz sand for a long-service-life single-crystal crucible and a preparation method and application of the inner-layer quartz sand, and one or two of 1-15 ppm of bismuth oxide and antimony trioxide are uniformly doped into the quartz sand through a high-temperature acid doping process. As the antimony oxide and the bismuth oxide are doped in the quartz sand, the viscosity of quartz melt can be reduced, overflow of a large amount of gas generated in the quartz sand melting process is facilitated, and the content of microbubbles in the inner layer of the quartz crucible is reduced, so that the density and the temperature resistance of the inner layer of the quartz crucible are improved, the defects caused by bubbles are reduced, and the service life of the crucible is prolonged.

The invention discloses an inorganic crystal material as well as a preparation method and application thereof, and belongs to the field of inorganic optical function crystal materials. The chemical formula of the inorganic crystal material is Nd < x > Dy < y > Lu < 3-x-y > Al < 3 > Sc GaO < 12 >, wherein 0.002 < = x < = 0.005, 0.005 < = y < = 0.05, and 0.1 < = x / y < = 0.5; nd < 3 + > and Dy < 3 + > replace the lattice of Lu < 3 + > in the crystal and are jointly distributed on the same lattice. The invention also provides a preparation method of the inorganic crystal material, and a single crystal with the size of phi 30mm * (50-60) mm can be grown. The inorganic crystal material is used for realizing blue light band laser output, and can realize 496nm blue light band laser output under 448nm pumping. The inorganic crystal material is good in optical quality and can meet the requirements of a high-power all-solid-state laser.

The application relates to a YAG / Yb:YAG / YAG composite laser transparent ceramic and a preparation method thereof. The Yb:YAG water-based ceramic ink comprises mixed powder composed of Al2O3 powder, Y2O3 powder and Yb2O3 powder, the solid content is 20-25 vol%, the mole ratio of Al2O3, Y2O3 and Yb2O3 is 5:3-x:x, and 0 < x <= 0.3; the dispersant content is 0.2-0.8% of the mass of the mixed powder; the pH control agent is used in an amount controlled to adjust the pH of the Yb:YAG water-based ceramic ink to be between 10-11.5 and the pH of the ink is greater than or equal to 9.5 within 24 hours under the conditions of sealing and 20-25 DEG C; the humectant content is 5-20% of the total volume of the Yb:YAG water-based ceramic ink; the binder content is 0.1-0.5% of the mass of the mixed powder; and the sintering aid content is 0.1-0.5% of the mass of the mixed powder.

The present invention relates to a zinc thiocyanate second-order nonlinear optical crystal material and its preparation and application. The chemical formula of the material is Zn(SCN)2, the molecular weight is 181.57, the material belongs to the tetragonal crystal system, the space group is #imgabs0#, the unit cell parameters are #imgabs1##imgabs2#α=β=γ=90°, Z=4, and the unit cell volume is #imgabs3##imgabs4#. Compared with the prior art, the crystal material of the present invention has a large frequency doubling effect. Under 4nm laser irradiation, its size is about 30 times the frequency-doubled intensity of KH2PO4 (KDP) crystal, and the birefringence is 0.164 at a wavelength of 546nm, which can achieve phase matching. It is about 0.2 to 2 times that of β-BaB2O4 (BBO) in the range of 600 to 800nm, about 15 to 30 times that of KDP in the range of 900 to 1500nm, and about 1.5 to 2 times that of KTiOPO4 (KTP) in the range of 1600 to 2000nm. In addition, the crystal material has good optical transmittance in the ultraviolet, visible and near-infrared light range, and its optical band gap is 4.56eV. Therefore, the crystal material has broad application prospects in the field of nonlinear optics.

The present invention discloses a capacitive flexible touch screen based on boron nitride and a preparation method thereof. The capacitive flexible touch screen includes a multifunctional film layer, a flexible film cover, a polarizer, a transparent insulating boron nitride-based touch electrode module, a film encapsulation layer, a flexible support layer, a buffer layer and a flexible metal layer from top to bottom; the transparent insulating boron nitride-based touch electrode module includes a first boron nitride layer, an upper indium tin oxide film, a second boron nitride layer, a fifth optically transparent adhesive OCA layer, a third boron nitride layer, a lower indium tin oxide film and a fourth boron nitride layer from top to bottom; the first boron nitride layer, the second boron nitride layer, the third boron nitride layer and the fourth boron nitride layer are all hexagonal boron nitride layers. The capacitive flexible touch screen based on boron nitride of the present invention has high transparency, good electrical insulation and strong chemical stability, and has high performance and reliability.

A projection lens includes a first optical lens group and a second optical lens group. The first optical lens group transmits an image beam to the second optical lens group. The second optical lens group projects the image beam out of the projection lens. The second optical lens group includes first and second reflective elements and an optical component. The optical component is disposed between the first and second reflective elements. The optical component includes a light-transmitting area and a reflective area. The first reflective element reflects the image beam from the first optical lens group and transmits it to the light-transmitting area. The light-transmitting area allows the image beam from the first reflective element to pass through and be transmitted to the second reflective element. The second reflective element reflects the image beam from the light-transmitting area and transmits it to the reflective area. The reflective area reflects the image beam from the second reflective element. A projection device equipped with the projection lens is also provided. The projection lens and projection device of the present invention have a foldable optical path to reduce the size of the projection lens, simplifying the manufacturing difficulty of the projection lens while maintaining good optical quality.

The invention discloses a non-stoichiometric long-afterglow transparent ceramic and a preparation method thereof. The chemical general formula of the ceramic is (RE1-xCex) 3 (Al1-yCry) 2Ga3 + zO12, RE is selected from one of Lu, Y and Gd, and the value ranges of x, y and z are as follows: 0.001 < = x < = 0.005, 0.0005 < = y < = 0.02, and 0.01 < = z < = 0.15. The ceramic is prepared by combining a vacuum sintering method with a hot isostatic pressing method. According to the invention, garnet is adopted as a matrix, a matrix regulation and control method is adopted, and an ion co-doping means is combined, so that the transmittance of the prepared ceramic can reach 78-85%, and the afterglow time is improved by 720-1080 minutes compared with that of Ce ion single-doped long afterglow transparent ceramic, is improved by 180-300 minutes compared with that of ceramic which is not subjected to HIP sintering, and is improved by 180-480 minutes compared with that of stoichiometric ratio ceramic.

A lighting system includes a light source module, a plurality of optical elements, and a wavelength conversion element. The plurality of optical elements comprise a light splitting element and at least one lens. Wherein the at least one lens is located between the light splitting element and the wavelength conversion element. The light splitting element is arranged on a transmission path of the laser beam and used for guiding the laser beam to be transmitted to the at least one lens, and the laser beam penetrates through the at least one lens and then is transmitted to the wavelength conversion element. Wherein at least one of the plurality of optical elements comprises a body and a light absorption structure, a light spot is formed on the body when a laser beam enters the body, the area where the light spot is located is defined as a first area, the first area is located on one side of the central axis of the body, and the other side of the central axis of the body is provided with a second area; wherein the light absorbing structure is distributed on at least one part of the edge of the body, and at least one part is adjacent to the second area. Therefore, the optical element is prevented from cracking due to temperature difference.

A projection lens comprises a first optical lens group and a second optical lens group. The first optical lens group is used for transmitting the image light beam to the second optical lens group. The second optical lens group is used for projecting the image light beam out of the projection lens. The second optical lens group comprises a first reflecting element, a second reflecting element and an optical element. The optical member is disposed between the first and second reflective elements. The optical part comprises a light-transmitting area and a reflecting area. The first reflecting element is used for reflecting the image light beam from the first optical lens group and transmitting the image light beam to the light-transmitting area. The light-transmitting area is used for allowing the image light beam from the first reflecting element to pass through and be transmitted to the second reflecting element. The second reflecting element is used for reflecting the image light beam from the light-transmitting area and transmitting the image light beam to the reflecting area. The reflecting area is used for reflecting the image light beam from the second reflecting element. The invention further provides a projection device with the projection lens. According to the projection lens and the projection device, the light path can be folded to reduce the size of the projection lens, the manufacturing difficulty of the projection lens can be simplified, and meanwhile good optical quality is maintained.

The utility model relates to a backlight module and a display device. A backlight module comprises a back frame, a light source, a diffusion plate and a sleeve. The diffusion plate is arranged on the back frame and located on the light emitting side of the light source. The sleeve is arranged on the back frame and penetrates through the lamp panel and the diffusion plate in the axial direction of the back frame. The diffusion plate is provided with a plurality of printing dots, and the diffusion plate is defined to be provided with a blank area allowing the sleeve to penetrate through and a first area surrounding the blank area. The first area comprises a high-density area and a low-density area, no printing dots exist in the blank area, and the distribution density of the printing dots in the high-density area is larger than the average distribution density of the low-density area. By means of the design of different distribution densities of the printing dots, the bright halo generated by the arrangement of the sleeve is overcome, and the light emitting uniformity and the optical grade of the whole light emitting surface are improved. The utility model further provides a display device comprising the backlight module.

The utility model provides an optical element driving mechanism. The optical element driving mechanism comprises a movable part, a fixed part and a driving assembly. The movable part is used for connecting an optical element. The movable part can move relative to the fixed part. The driving assembly drives the movable part to move relative to the fixed part.

The utility model discloses a swing type air grid device, including air grid swing unit, air grid swing unit includes air grid support, air knife and swing drive assembly, and the air knife is installed in the air grid support, and can swing along the swing direction, the air knife is provided with the air -blowing hole, swing drive assembly includes drive part, first transmission part and second transmission part, and the drive part is installed in the air grid support, and first transmission part is connected with drive part transmission, and rotates under the drive of drive part, and second transmission part is connected with the air knife, and second transmission part is connected with first transmission part transmission, and when first transmission part rotates, the air knife is guided to swing along the swing direction. A kind of glass production device, including the swing type air grid device and conveying roller assembly of described. The utility model can swing along swing direction by the air knife of air grid unit itself, reciprocate in the conveying direction of cooperation glass, can reciprocate air blowing in different directions, reduce wind spot in the toughening process of glass. The utility model discloses a kind of glass production equipment.

The laser positioning cutting device for the automobile lamp lens comprises a base, and two transverse sliding rails are oppositely and fixedly connected to the two sides of the base; a longitudinal guide rail is connected between the two transverse slide rails in a sliding manner; the top of the longitudinal guide rail is slidably connected with a laser cutting machine, and the longitudinal guide rail and the laser cutting machine are both driven by a linear module. A negative-pressure channel is formed in the base, and one end of the negative-pressure channel extends out of the base; limiting mechanisms are inserted into the positioning insertion holes, each limiting mechanism comprises a bottom block, the positioning insertion holes are formed in the base at equal intervals, and after the limiting mechanisms are inserted, horizontal displacement of the lens is limited through physical constraint of the positioning insertion holes; meanwhile, the vacuum suction cup is matched with the sealing ring, uniform adsorption force is formed on the bottom of the lens, shaking caused by vibration and uneven weight during cutting is prevented through double effects, and it is ensured that the cutting track is consistent with the design contour of the lens; the limiting mechanism is installed in an insertion mode, and when lenses of different specifications are replaced, insertion hole combinations can be rapidly adjusted and positioned, and universality and efficiency are both considered.

The method for improving the optical quality of CVD zinc selenide comprises the following steps: pre-treating and screening zinc selenide blocks: carrying out material breaking, grinding, rough polishing and detection on zinc selenide grown by a CVD method, screening out the zinc selenide blocks with different quality grades, and further screening out low-quality zinc selenide blocks containing fog layers and fog spots; cleaning: carrying out ultrasonic cleaning on the low-quality zinc selenide block containing the fog layer and the fog spots; a sheath is manufactured in advance according to the size of the zinc selenide block, the sheath is made of a pure metal material resisting the temperature and pressure of heat isostatic pressing, the purity is not lower than 3 N, and the sheath is subjected to ultrasonic cleaning; the zinc selenide block is loaded into a sheath with the proper size, the sheath is vacuumized through a vacuum pump, air in the sheath is removed, and then the sheath is sealed through hot melting welding; performing hot isostatic pressing treatment; and taking out the zinc selenide block with the sheath after the hot isostatic pressing treatment from the standard hot isostatic pressing furnace, removing the sheath sleeved on the zinc selenide block, and carrying out rough polishing detection on the zinc selenide block.

The invention relates to a rare earth doped yttrium gallate laser material and a preparation method and application thereof, and belongs to the technical field of intermediate infrared laser gain materials. The rare earth doped yttrium gallate laser material provided by the invention is RE < x > Y < 1-x > GaO < 3 >, RE is at least one of Er, Ho and Dy, and x is more than 0 and less than 1. The invention also provides a preparation method of the laser material and an application of the laser material in mid-infrared laser gain. The mid-infrared laser crystal material with high optical quality is prepared by designing a reasonable temperature field structure, growth process parameters, doping concentration and the like; middle-infrared band laser realized by the crystal material has important application prospects in the fields of medical treatment, environmental monitoring, national defense, scientific research and the like.

The present invention relates to the technical field of electrode preparation of optoelectronic functional crystal devices, and specifically to an electro-optical element in which a potassium tantalate niobate crystal forms an ohmic contact with an electrode and a preparation method thereof. The preparation method of the electro-optical element comprises the following steps: (1) using an ion-doped grown potassium tantalate niobate crystal and performing optical-grade polishing on it; (2) using magnetron sputtering to plate a double-layer metal film electrode on the surface of the potassium tantalate niobate crystal; (3) rapidly annealing the plated crystal under ultraviolet laser irradiation. The ion-doped potassium tantalate niobate crystal is used to reduce the barrier width between the metal and the crystal, making it easier for electrons or holes to tunnel, thereby reducing the annealing temperature required to achieve ohmic contact. At the same time, by adding laser irradiation during the annealing process, the annealing temperature for the potassium tantalate niobate crystal to form an ohmic contact with the electrode is further reduced, thereby avoiding damage to the interior of the crystal by high-temperature annealing, and the electro-optical element obtained has good optical quality and stable electrical properties.

The utility model discloses a reflective bowl, a lens module of the reflective bowl and an automobile lamp, and aims to overcome the defect that product defects caused by an injection molding process cannot be avoided due to the structure of an existing reflective bowl. The reflective bowl comprises a reflective bowl body and a handle structure arranged on the outer edge of the reflective bowl body, the handle structure and the reflective bowl body are integrally formed, the reflective bowl is an injection molding part, an injection molding opening is formed in the handle structure, injection molding defects are prevented from being formed on the reflective bowl, the process requirement is lowered, and the yield is improved.

The invention relates to YAG / Yb: YAG / YAG composite laser transparent ceramic and a preparation method thereof. Wherein the adopted Yb: YAG water-based ceramic ink comprises mixed powder composed of Al2O3 powder, Y2O3 powder and Yb2O3 powder, the solid content is 20-25 vol%, and the molar ratio of Al2O3 to Y2O3 to Yb2O3 is 5: (3-x): x, 0lt; x is smaller than or equal to 0.3; the content of the dispersing agent is 0.2-0.8% of the mass of the mixed powder; the dosage of the pH control agent is controlled to adjust the pH of the Yb: YAG water-based ceramic ink to be 10-11.5, and the pH of the ink is greater than or equal to 9.5 within 24 hours under the conditions of sealing and 20-25 DEG C; the content of the humectant is 5-20% of the total volume of the Yb: YAG water-based ceramic ink; the content of the binder is 0.1-0.5% of the mass of the mixed powder; and the content of the sintering aid is 0.1-0.5% of the mass of the mixed powder.

The invention discloses an optical lens. The optical lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, an eighth lens, a seventh lens, a fifth lens and a sixth lens from an object side to an image side along an optical axis. The third lens has a negative refractive index, and an optical axis region of an object side surface of the third lens is a convex surface or a circumferential region of the object side surface of the third lens is a convex surface or an optical axis region of an image side surface of the third lens is a concave surface or a circumferential region of the image side surface is a concave surface. The eighth lens has a positive refractive index. The seventh lens has a negative refractive index. The fifth lens has a positive refractive index, and the circumferential area of the object side surface of the fifth lens is a convex surface. The optical axis area of the object side surface of the sixth lens is a convex surface, and the circumferential area of the object side surface of the sixth lens is a concave surface. The optical lens only comprises the eight lenses, and meets the requirements that Dmax12 / Sag12 is larger than or equal to 7.500 and Fno * D11t31 / EFL is larger than or equal to 1.500.

The present invention relates to a semi-organic antimony fluoride second-order nonlinear optical crystal material and its preparation and application. The chemical formula of the material is (C5H7N2)(Sb2F7), which belongs to the monoclinic system, and its space group is Pn (No.7). The unit cell parameters are #imgabs0#α=90°, β=102.44°~102.64°, γ=90°, Z=2, and the unit cell volume is #imgabs1#. Compared with the prior art, the powder frequency doubling effect of the second-order nonlinear optical crystal material (C5H7N2)(Sb2F7) of the present invention under 1064nm laser irradiation is about twice that of KH2PO4 (KDP) crystal, and phase matching can be achieved. In addition, the crystal material has the advantages of a wide light transmission band, stable physical and chemical properties, moderate mechanical hardness, high yield, easy growth, etc., and has important application value in optoelectronic information fields such as laser frequency conversion, optical information storage, and electro-optical modulation.

The present application provides an optical projection system configured to make imaging light from a display screen pass through the optical projection system into an eye of an observer to form an image. Wherein a side facing the eye is an eye side and a side facing the display screen is a display side. The optical projection system comprises, in order from the eye side to the display side along an optical axis, a first lens, a second lens, a third lens and a fourth lens, each of the first lens to the fourth lens comprises an eye side surface facing the eye side and passing the imaging light and a display side surface facing the display side and passing the imaging light, the optical projection system further comprises an aperture, a prism module and a protective cover plate. Wherein the optical projection system has only the above four lenses with refractive power, and satisfies the following conditional expression: 12.0 degrees ≤ FOV / 2 ≤ 13.2 degrees, wherein FOV is the field of view angle of the optical projection system.

This invention discloses a casting method and corresponding casting machine for resin lens molding. The method includes steps such as mold loading and conveying, automatic centering and vertical rotation, automatic tape tearing, X-axis station switching, resin injection, mold tilting to ensure uniform resin distribution, and material discharge and return to horizontal position. Through precise mold positioning, automatic tape tearing, visual inspection of resin injection, and tilting for flow guidance, the resin lens casting process is automated, homogenized, and achieves high-precision molding.

The invention relates to a method for producing a composite pane (1), comprising the following steps: (a) forming a first stack sequence (2), which comprises, in the following order:-a first adhesive film (4) made of an optically transparent curable adhesive,-an electro-optical functional film (9),-a second adhesive film (5) made of an optically transparent curable adhesive, b) forming a layered frame (6) made of thermoplastic material around the first stack sequence (2), c) forming a second stack sequence (11) comprising, in the following order:-a first glass pane (3),-at least one first thermoplastic plastic film (12),-a first stack sequence (2) having a layered frame (6),-at least one second thermoplastic plastic film (13),-a second glass pane (10), d) laminating the second stack sequence (11) by the action of heat and pressure, e) curing the optically transparent adhesive.

The invention provides an optical element driving mechanism. The optical element driving mechanism comprises a movable assembly, a fixed part, a driving assembly and a circuit assembly. The movable assembly is used for connecting the optical element and can move relative to the fixed part, and the driving assembly is used for driving the movable part to move relative to the fixed part. The circuit assembly connects the movable assembly and the fixed part.

The invention relates to the technical field of special glass manufacturing, and discloses a preparation method and a melting method of an anti-radiation neutral borosilicate medical special glass container material, and the preparation method comprises the following steps and components: a boron source: boron carbonate and boric acid, which are mixed according to a mass ratio of 1: 1, and the total mass of the boron source accounts for 50% of the total mass of the boron element; a silicon source: silica sand, the addition amount of which accounts for 25% of the total mass; the nano zinc oxide nano particles are nano oxidized nano particles subjected to surface modification by a silane coupling agent, and the adding amount of the nano zinc oxide nano particles accounts for 1.5% of the total mass; the rare earth elements comprise erbium, samarium, dysprosium and europium, each element accounts for 0.5% of the total mass, and the total mass is 2%; the fluxing agent is formed by mixing lithium tetraborate and lithium metaborate according to the mass ratio of 1: 1, and the total adding amount is 7% of the total mass. The addition of rare earth elements and the uniform distribution of the rare earth elements in a glass matrix are accurately controlled, and the hierarchical addition of the rare earth elements such as erbium, samarium, dysprosium and europium not only optimizes the chemical activity of the rare earth elements, but also enhances the absorption and shielding effects on different types of radiation.

The present invention relates to a magnesium-aluminum spinel transparent ceramic with high optical quality and a preparation method thereof, and belongs to the technical field of ceramic materials. The preparation method comprises: step (1): mixing a phased magnesium-aluminum spinel powder with a sintering aid by ball milling and calcining to obtain a raw material powder; preferably, the sintering aid is a yttrium aluminum compound, preferably YAG (Y3Al5O 12 ), YAM (Y4Al2O9), YAP (YAlO3); step (2): forming the obtained raw material powder into a green blank; step (3): calcining and pressureless sintering the green blank to obtain a pre-burned body; step (4): hot isostatic pressing the pre-burned body to obtain a magnesium-aluminum spinel transparent ceramic with high optical quality. The method has a simple preparation process and strong repeatability. The obtained magnesium-aluminum spinel transparent ceramic has excellent optical quality in the visible-near infrared band and good mechanical properties.

The utility model provides a lens cone structure and an optical lens having the same, the inner wall surface of the lens cone structure is provided with a bearing ring surface used for bearing a first lens, the bearing ring surface is arranged perpendicular to the central axis of the lens cone structure, the bearing ring surface is provided with at least one air hole structure, at least one part of the air hole structure leans against the first lens, and the air hole structure is arranged perpendicular to the central axis of the lens cone structure. At least the other part of the air hole structure and the first lens are arranged in a spaced mode to form a ventilation area, the ventilation area extends to the outer ring of the bearing ring face and the inner ring of the bearing ring face, and the maximum depth V of the ventilation area in the direction of the central axis of the lens cone structure meets the condition that V is larger than or equal to 0.003 mm and smaller than or equal to 0.015 mm. The optical lens solves the problem of poor structural stability of the optical lens in the prior art.

The utility model provides an optical element driving mechanism. The optical element driving mechanism comprises a first movable part, a fixed part and a driving assembly, the first movable part is used for connecting an optical element. The first movable part can move relative to the fixed part. The driving assembly is used for driving the first movable part to move relative to the fixed part. The driving assembly can drive the first movable part to be converted into a second state from a first state relative to the fixed part, and the first state and the second state are included in the movement range.

A control unit of a radiation imaging apparatus includes: an exposure time control unit which controls a subframe exposure time of an image sensor such that focused fluorescence at a depth of field generated by radiation reaching a scintillator and out-of-focus fluorescence deviating from the depth of field are discretely imaged on a light receiving surface of the image sensor for each particle of the radiation; a focused signal discrimination unit which discriminates between sensor signals of a light receiving pixel group corresponding to spots of the focused fluorescence discretely included in each subframe and sensor signals of a light receiving pixel group corresponding to spots of the out-of-focus fluorescence; and an image signal processing unit which generates an image by overlaying subframe data based on the sensor signals from the light receiving pixel group corresponding to the spots of the focused fluorescence.