10results about How to "Improve optical quality" patented technology

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.

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 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 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 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.

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 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.

This invention discloses a glass heating and forming equipment, relating to the field of glass hot bending forming technology. It includes a furnace frame, a furnace cavity, a placement platform, and a lifting system. The placement platform is equipped with a solid mold and a horizontally retractable support frame. The lifting system drives the placement platform to rise and close with the furnace cavity to form a closed heating chamber. When the support frame retracts, a linkage brush rod mechanism lifts the edge of the workpiece upwards, eliminating local concave corner defects. A partition glass is installed inside the solid mold to prevent direct contact between the workpiece and the mold, which could cause pitting and optical distortion. The placement platform can move horizontally and descend rapidly, utilizing gravity for secondary forming to improve the fit of curved surfaces. This equipment solves problems such as insufficient spherical and edge forming during the self-weight forming of bus windshields, optical distortion caused by long heating times, and low efficiency of manual edge pressing. It shortens the heating time, reduces optical defects, and improves the yield and product stability.

The invention belongs to the technical field of crystal material preparation, and particularly relates to a method for growing sapphire crystals by a wide seed crystal edge-defined film-fed crystal growth method, which comprises the following steps of: firstly, preparing an Al2O3-based raw material through multi-step sintering, carrying out acid etching microstructuring treatment on R / M surface seed crystals, arranging an array type feeding seam mold above a crucible during charging, and carrying out vacuum replacement for three times, so as to obtain a sapphire crystal; a gradient temperature field is established through three-area independent temperature control, seeding is performed after melt is immersed into a mold, the growth process comprises seeding, shouldering and equal-diameter growth, wide diameter expansion and equal-diameter growth of crystals are realized by accurately controlling the pulling rate, the crucible rising speed and the three-section power of a middle heating area, and the crystals are automatically separated from the mold; and high-temperature, medium-temperature and low-temperature three-stage gradient annealing is carried out under argon protection to release stress and stabilize the structure, so that the transverse temperature gradient can be accurately controlled below 5 DEG C / cm, the problem of large temperature difference between the edge and the center during wide seed crystal growth is solved, and the stability of the solid-liquid interface shape and the uniformity of crystal growth are ensured.