89results about How to "Good astigmatism" patented technology

The present invention provides a photographing optical lens assembly comprising, in order from the object side to the image side: a first lens element with positive refractive power having a convex object-side surface and a concave image-side surface, the object-side and image-side surfaces thereof being aspheric; a second lens element with negative refractive power having a concave object-side surface and a convex image-side surface, the object-side and image-side surfaces thereof being aspheric; and an aperture stop located in front of the first lens element; wherein an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, and they satisfy the relation: |V1−V2|<15; and wherein the number of the lens elements of the photographing optical lens assembly is limited to two. Such an arrangement of optical elements can effectively reduce the volume of the lens assembly and the sensitivity of the optical system and enable the lens assembly to obtain a higher resolution.

This invention provides an image-capturing lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power; a third lens element with positive refractive power having a concave object-side surface and a convex image-side surface, the object-side and image-side surfaces thereof being aspheric; a fourth lens element with negative refractive power having a concave image-side surface on which at least one inflection point is formed, the object-side and image-side surfaces thereof being aspheric; and a stop disposed between an imaged object and the first lens element; wherein there are four lens elements with refractive power. Such an arrangement of optical elements can effectively reduce the size of the lens assembly, mitigate the sensitivity of the optical system and enable the lens assembly to obtain a higher resolution.

This invention provides an image-capturing lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power; a third lens element with positive refractive power having a concave object-side surface and a convex image-side surface, the object-side and image-side surfaces thereof being aspheric; a fourth lens element with negative refractive power having a concave image-side surface on which at least one inflection point is formed, the object-side and image-side surfaces thereof being aspheric; and a stop disposed between an imaged object and the first lens element; wherein there are four lens elements with refractive power. Such an arrangement of optical elements can effectively reduce the size of the lens assembly, mitigate the sensitivity of the optical system and enable the lens assembly to obtain a higher resolution.

The new LED back light module includes LED units on a base plate, one casing and one light scattering and refracting mechanism with outer vertical plane as the outgoing plane. It features the partially reflecting and partially transmitting optical structure unit set in the light outgoing direction of the LED units and with structure independently to the LED units. The light from the LED' s is transmitted partially and scattered mostly in the optical structure unit so as to avoid LED shade spot in the light outgoing plane of the module. The optical structure unit may be regulated flexibly to reach proper ratio between the transmitted light and the scattered light. The present invention is suitable for various kinds of LED light source.

The invention relates to the electrical design field, and discloses a coat having a high light transmittance and a high astigmatism degree. The coat comprises 1-15% by mass of spherical organic silicon micro-powder, 0-5% by mass of square barium sulfate, 0-15% by mass of an inorganic filler, 20-90% by mass of a resin, 0-40% by mass of a solvent, 0-4% by mass of an assistant and 0-0.5% by mass of a coloring agent, and the spherical organic silicon micro-powder has a high light transmittance and a high astigmatism degree. The invention also discloses an LED lampshade having a high light transmittance and a high astigmatism degree. The LED lampshade comprises the coat and an LED lampshade body, and the coat is coated on the LED lampshade body. The invention also provides a PC material having a high light transmittance and a high astigmatism degree. The PC material is composed of 0.7-1.0% by mass of the spherical organic silicon micro-powder, 0-1.0% by mass of the square barium sulfate and 98-99% by mass of a transparent PC material, and the spherical organic silicon micro-powder has a high light transmittance and a high astigmatism degree. The PC material is used for preparing lampshades or sheets.

A progressive power eyeglass lens includes an object side surface that includes a first progressive surface, an eyeball side surface that includes a second progressive surface, and a pair of points that is passed by a light beam passing through a rotation center of an eyeball of an eyeglasses wearer, the pair of points including a first point that exists on a principal meridian on the eyeball side surface between a progressive start point to a progressive end point, and a second point that exists on a principal meridian on the object side surface.

Disclosed is a method for making an agricultural full-degradation paper film by crop straws. The plant full-degradation agricultural paper film substitutes for the plastic film and is used for farmland mulching, resulting in good economic benefit and complete elimination of serious soil pollution caused by the plastic film. Development and use of the paper film made of plant fibers can produce good biodegradability. The method uses agricultural straw fibers as raw materials, and adopts a high-tech and novel process technique, namely a degradation method by dipping and oxidation catalysis, without high temperature and high pressure, and having no generation of black smoke and pollution; straw fibers can be degraded intactly without alkali, thereby changing properties of lignin, separating colloid ash content, and improving the physical property. The paper film made of straws has properties of wet-dry strength, warmth retaining and light transmittance required for applications, and is applicable to various weather such as wind and rain, overcast and shine by properly adding necessary additives; and the product has advantages of good full biodegradation performance, non pollution, low cost and strong market competitiveness.

The invention discloses an image display apparatus. The image display apparatus comprises a display screen, and an ocular-side double-convex lens, a reflection element and a first achromatic lens which are disposed on an image light transmission optical path of the display screen, wherein the first achromatic lens is coaxially arranged with the ocular-side double-convex lens and is disposed at the light- emitting side of the ocular-side double-convex lens, an optical axis of the display screen and an optical axis of the ocular-side double-convex lens form a preset included angle, the reflection element is disposed between the display screen and the ocular-side double-convex lens, and image light is reflected on the reflection element, sequentially penetrates the ocular-side double-convex lens and the first achromatic lens, and then reaches a watching side so as to form a virtual image. The invention further discloses a head-mounted display device. According to the formed optical system, the system space volume can be reduced, compressed and amplified, a series of image errors such as coma, astigmation, aberration and the like can be improved, the magnitude of distortion is controlled, and under the condition that viewers can see amplified virtual images with excellent image quality, the requirements of a conventional head-mounted display device for miniaturization and light-weight design are satisfied.

The invention discloses an optical photographic system, which comprises four lenses with refracting power, sequentially comprising a first lens, a second lens with a positive refracting power, a third lens with a negative refracting power and a forth lens with a positive refracting power from the object side to the image side, wherein at least one of an object side surface and an image side surface of the second lens is an aspheric surface; an object side surface of the third lens is a concave surface; an image side surface of the third lens is a convex surface; the object side surface and the image side surface of the third lens are aspheric surfaces respectively; an object side surface and an image side surface of the fourth lens are aspheric surfaces respectively; and the optical photographic system also comprises an aperture which is arranged between an photographed object and the second lens. In the configuration mode of the lens group, the total length of the lenses can be effectively shortened, a wider viewing angle is provided and favorable imaging quality can be obtained.

The invention relates to micro-nano modified super bright polyester fibers, and a preparation method thereof. The preparation method comprises the following steps of (1) preparing aminated nano barium sulfate and (2) spinning: firstly carrying out esterification reaction, then carrying out copolycondensation and finally carrying out a final polycondensation reaction to prepare the micro-nano modified super bright polyester, performing melt spinning on the micro-nano modified super bright polyester to obtain the micro-nano modified super bright polyester fibers. By modifying surfaces of barium sulfate particles and designing a barium sulfate-ethanediol pulping process, the polycondensation is guaranteed to be performed stably and particles are uniformly distributed in the polyester fibers. A surface modification technology for barium sulfate micro-nano inorganic particles is developed, so that highly dispersed barium sulfate master batches and in-situ polymerization addition technology are formed, and finally high-quality fine denier super bright polyester fibers with improved gloss, color and mechanical properties are prepared.

This invention provides a photographing lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface and a convex image-side surface; a second lens element with negative refractive power having a concave object-side surface and a concave image-side surface; a third lens element with negative refractive power, the object-side and image-side surfaces thereof being aspheric; a fourth lens element with negative refractive power having a concave image-side surface on which at least one inflection point is formed; and an aperture stop disposed between an imaged object and the second lens element; wherein there are four lens elements with refractive power. Such an arrangement of optical elements can effectively reduce the size of the lens assembly, attenuate the sensitivity of the optical system and enable the lens assembly to obtain higher resolution.

The invention relates to the technical field of vision enhancement, and discloses a training apparatus for vision enhancement. The training apparatus comprises a shell, a base, support arms, a liftingcolumn, a handpiece, a dynamic monitoring device, a controller and a light source, wherein the handpiece is fixed to the upper parts of the supporting arms; the supporitng arms are connected with thebase through the lifting column; a weak laser module, a dynamic probe, a light-emitting plate, a first controller and a light source are internally arranged in the handpiece; a dynamic monitoring display screen is mounted above the outside of the handpiece; the direction, facing the face, of the handpiece is a front view window, and an eye shade is mounted on the front view window; and a touch display screen is mounted aslant in the direction, facing the front view window, of the base. When the training apparatus for vision enhancement is used, light beams with specific wavelengths in solar rays can be simulated through irradiation, so that increase of amount of production of retinal dopamine is promoted, and the aims of inhibiting abnormal lengthening of optic axis and controlling myopiadevelopment are fulfilled; and in the process, multi-directional training, distance training and lightness training of eye muscles can be added, so that the abilities, including focusing, watching and the like, of the eyes can be enhanced, and therefore, the training apparatus is suitable for preventing, controlling, enhancing and treating myopia, astigmatism, amblyopia, anisometropia and asthenopia.

The invention relates to a main-three-reflector-integrated coaxial four-reflector optical system, and belongs to the technical field of space optical remote sensing. The optical system comprises a main reflector, a secondary reflector, a third reflector and a fourth reflector, wherein the four reflectors are coaxially arranged, so that the axial length of the optical system is effectively reduced;and the secondary reflector and the fourth reflector are located on the same side of the main reflector, and the main reflector and the third reflector are integrally machined and designed, so that the machining and adjusting difficulty is reduced. The four secondary aspheric reflectors are adopted, so that astigmatism and field curvature correction is facilitated, and system stray light is highly and effectively suppressed at the first image plane based on the secondary imaging principle. The optical system is compact in structure, low in distortion and good in stray light inhibition.

The invention relates to a light-emitting diode light fitting which comprises a cover body and a plurality of light-emitting diodes. A light guide stick is arranged in the cover body; the light-emitting diodes are respectively arranged on both ends of the light guide stick; the light guide stick can be made of materials which can transmit light; a plurality of debosses or bulges are formed on the outer surface of the light guide stick; and light emitted by the light-emitting diode goes through the light guide stick and goes out of the outer surface of the light guide stick. The light-emitting diode light fitting can produce good light radiating effect, has soft illumination effect, reduces glare, and is beneficial to indoor illumination.

The invention discloses a panel ceiling lamp. The panel ceiling lamp comprises mounting seats, LED lamp plates and covers, wherein the LED lamp plates are installed at the middle positions in the covers, and LED lamp beads are uniformly installed at the bottom of the LED lamp plates. A controller and a temperature sensor are correspondingly installed at the top ends in the covers of the two sidesof a metal sheet. Cooling fans are installed on the two sides of each cover, clamping seats are fixed to the two sides of the top of each cover, and reset springs are installed in the clamping seats.Butting clamping blocks are connected to the ends, away from the clamping seats, of the reset springs. The mounting seats are arranged at the top of the covers, and butting clamping grooves matched with the butting clamping blocks are formed in the two ends of each mounting seat. According to the panel ceiling lamp, diffused light plates are installed in the covers under the LED lamp plates, diffusion holes matched with the LED lamp beads are uniformly formed in the diffused light plates, diffused light films are arranged in the covers of the bottom of the diffused light plate, light is convenient to diffuse, and irradiated area of the light is improved.

A method for collimating the beams of a laminated pulse semiconductor laser belongs to the technical field of manufacturing a semiconductor laser device. The prior art adopts an array lens to realize the plastic of the beams of a semiconductor laser array and the discreteness of the related array lens and the semiconductor laser array is smaller. The invention aims at realizing the collimation of the beams of the laminated pulse semiconductor laser, thereby improving coupling efficiency. The invention is characterized in that the invention adopts an collimating lens holding frame which is vertically arranged on a heat sink; an illuming area of each single tube in the laminated pulse semiconductor laser is opposite to a V-shaped slot on the collimating lens holding frame; a fine adjusting frame is adopted to clamp the collimating lens holding frame and an collimating post lens and the space position between the collimating lens holding frame and the collimating post lens are finely adjusted until a rectangle plane of the collimating lens holding frame is parallel to the illuming surface of the laminated pulse semiconductor laser; the beams exited by the collimating post lens meet the collimation requirement for beams; the collimating lens holding frame is fixed on the heat sink by an adhesive and the collimating post lens is fixed in the V-shaped slot; then the position adjustment and fixing of each collimating post lens are finished in the V-shaped slot one by one.

The great power LED lamp with scattered light has circuit board with densely installed LED light emitters and the front side of the circuit board is packed with high transparency organic silicone gel and LED light emitter packing material to eliminate the light converging performance of the LED light emitters and generate excellent light scattering effect while not decreasing the brightness radically. The organic silicone gel which moistureproof and antiageing performance can protect the LED light emitters for endurance in outdoor environment. The back side of the circuit board has one electrically insulating and heat conducting sheet adhered with heat conducting silicone to dissipate heat of the LED light emitters. The great power LED lamp of the present invention may be used as various kinds of lamp practically.

The invention discloses a vision corrector, and in particular relates to a dynamic intelligent vision corrector. In the dynamic intelligent vision corrector, an input end of a central control chip is connected with output ends of a lens overlapping time controller, a lens separating time controller, a correction time regulator and a power adaptor; an output end of the central control chip is connected with a drive motor; an output shaft of the drive motor is connected with a lens moving frame provided with a lens; a lens fixed frame provided with a lens is arranged on an outer shell; and the lens fixed lens is matched with a lens moving frame. The dynamic intelligent vision corrector is simple in structure, and is provided with two optical lenses and a thermal light source lighting lamp; one lens is fixed and the other lens can rotate and is overlapped with the fixed lens, so that a user uses the vision corrector freely and comfortably for a long time; and the dynamic intelligent vision corrector is convenient to use, and has a good effect of correcting myopia, amblyopia and lens astigmatism.

The invention provides a display device. The display device has a display region and a peripheral region located around the display region. The display device comprises an array substrate, an opposite substrate, a liquid crystal layer and an adjustable voltage signal wire. The liquid crystal layer is disposed between the array substrate and the opposite substrate; the array substrate comprises a plurality of pixel units arranged in the display region and a storage capacitor line arranged in the peripheral region, wherein each pixel unit comprises a storage capacitor and is electrically connected with the storage capacitor line; the adjustable voltage signal wire is disposed in the peripheral region and is arranged adjacent to the storage capacitor line, wherein the adjustable voltage signal wire is electrically connected with an adjustable voltage driving unit and is used for providing a voltage so as to generate a voltage difference with the storage capacitor line.

An eye-side refractive surface 11 of a distance portion is concave and at least part of an eye-side refractive surface 3 of a near portion is a convex region 31 where one or both of principal meridians of the surface are convex. This provides a back surface progressive-power lens capable of solving disadvantages in terms of lens thickness, external appearance and the like in a back surface progressive-power lens in which the eye-side refractive surface is formed of a progressive-power surface.

The invention discloses a vehicle headlamp having an anti-scattering structure. A main light assembly is arranged in a lamp housing, the main light assembly comprises a lamp cup, and a lamp plate and more than one scattering shielding plate, wherein the lamp cup has a front end and a rear end, an inwardly concave reflecting wall is formed on the front end, a through hole is formed in a bottom end of the reflecting wall, and passes through the rear end of the lamp cup, the lamp plate is arranged at the rear end of the lamp cup, more than one light emitting diode (LED) is arranged on the lamp plate, and faces the through hole in the lamp cup, the scattering shielding plate is located at a lower edge of the through hole, and shields part of light paths of the LED, thus generating a light type which can prevent the sight of an opposite vehicle from being affected and complies with regulations, and improving the problem of scattering.

The invention discloses a plastic heat-dissipation light-scattering master batch and a preparation method thereof. The master batch is composed of the following components in percentage by weight: 40-55% of gas-phase white carbon black, 20-35% of heat-conducting composition, 10-20% of matrix resin, 3-5% of dispersing agent, 1-3% of lubricating assistant and 0-1% of other assistant. The preparation method comprises the following steps: attaching the heat-conducting composition into micropores of the gas-phase white carbon black, sintering to obtain light-scattering two-element microspheres with high heat conductivity, grinding and dispersing with a sand mill, and carrying out melt dispersion and granulation of the high-melting-index K resin to obtain the plastic heat-dissipation light-scattering master batch. The master batch has the heat dissipation effect; and since the light-transmitting heat-conducting composite material is adsorbed and molten in the pores of the gas-phase white carbon black, so that the original light-reflection low-light-transmittance gas-phase white carbon black has light transmittance and higher light scattering performance.

A virtual aperture integrated into an intraocular lens is disclosed. Optical rays which intersect the virtual aperture are widely scattered across the retina causing the light to be virtually prevented from reaching detectable levels on the retina. The use of the virtual aperture helps remove monochromatic and chromatic aberrations yielding high-definition retinal images. For a given definition of acceptable vision, the depth of field is increased over a larger diameter optical zone. In addition, thinner intraocular lenses can be produced since the optical zone can have a smaller diameter. This in turn allows smaller corneal incisions and easier implantation surgery.

The invention discloses a sectional type through tail lamp for an automobile. The tail lamp comprises a tail lamp middle section, a tail lamp left end part and a tail lamp right end part, the tail lamp left end part and the tail lamp right end part are located on the two sides of the tail lamp middle section respectively, the tail lamp middle section is installed on an automobile trunk door, and the tail lamp left end part and the tail lamp right end part are installed on the two sides of the tail lamp middle section respectively, namely, the tail lamp left end part and the tail lamp right endpart are installed at the corresponding positions of the automobile tail. By designing the three-section type sectional penetrating tail lamp, the effect of penetrating through the tail lamp can be achieved on the low-configuration Audi A6, and different display effects can be achieved by matching with different controllers; and silica gel reflective strips are arranged, the better light scattering effect is achieved, silica gel can bear the high temperature of 300 DEG C or above, and the heat conductivity is good.

The invention discloses an optical lens group, a camera module and a terminal. The optical lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from an object plane to an image plane along an optical axis, the first lens has positive meandering force. The image side surface of the second lens at the optical axis is a concave surface; the image side surface of the fourth lens at the optical axis is a convex surface; the image side surface of the fifth lens at the optical axis is a concave surface; the vector height of the object side surface of the first lens is SAGF11; the vector height of the image side surface of the first lens is SAGF12, the air interval between the first lens and the second lens at the maximum effective diameter is ET12, and SAGF11, SAGF12 and ET12 satisfy the following conditional expression: 0 < = (| SAGF11 | + | SAGF12 |) / ET12 < = 5. Through the arrangement, the injection molding yield ofthe lens can be improved, and the influence of quality fluctuation caused by the molding tolerance of the lens and the lens cone and the assembly process on the imaging performance is reduced, so that the production stability and the comprehensive yield are improved on the premise of ensuring the imaging quality, and the product profit is improved.

The invention discloses an LED panel lamp and a production process thereof, and solves the problems of inconvenient installation and poor light diffusion effect in the existing LED lamps. The essential of the technical scheme thereof is as follows: the LED panel lamp comprises a substrate, a power supply module and at least one LED lamp which are integrally moulded, wherein the substrate comprises a side diffusion plate and a panel which is arranged in a sinking manner; a power supply installation seat for placing the power supply module is arranged at the central position of the panel; the LED lamps are installed by taking the power supply installation seat as a centre to form a polygon; and a lampshade of each LED lamp is fixed on the panel through clips. The LED panel lamp is more material-saving because of achieving integral moulding, convenient to detach and install, and capable of realizing detachment without the need of any detachment tool; the light diffusion effect is good, and LED lights can be softer and more uniform because of being diffused by the side diffusion plate, and can be reflected due to arrangement of the power supply fixation seat to achieve cross scattering thereamong, so as to be soft.

The invention relates to the field of optics, in particular to a zoom lens and an imaging device. The zoom lens is sequentially composed of a first lens group with positive focal power, a second lens group with negative focal power, a diaphragm, a third lens group with positive focal power, a fourth lens group and a fifth lens group with positive focal power from an object plane side to an image plane side. The second lens group, the fourth lens group and the fifth lens group move in the main optical axis direction of the zoom lens; the fourth lens group sequentially comprises a positive focal power lens and a negative focal power lens from the object plane side to the image plane side; the zoom lens satisfies the following conditional expressions: ft is greater than 175 mm; tTL is less than 135 mm; wherein ft is the focal length of the zoom lens in the telescopic state, and TTL is the total optical length of the zoom lens. Through the limitation of the structure and the parameters, the number of the lenses in the zoom lens is small under the condition that the resolving power basis is realized, and the functions of small size and ultra-long focus of the zoom lens are realized.

The invention relates to an LED (light-emitting diode) point light source which comprises a housing, wherein a circuit board is arranged in the housing; and LED lamp beads are arranged on the circuit board. According to the technical scheme, the key point is that the a first connecting plug and a second connecting plug which are electrically connected with the circuit board are respectively arranged on the housing, wherein one end of each of the first connecting lug and the second connecting lug is exposed out of the housing for external connecting. The LED point light source is simple in structure, convenient to dismount, capable of being freely connected, and convenient to replace when a bad product appears after the connecting.