10results about How to "Increase chromatic aberration" patented technology

The utility model belongs to the field of film processing, and particularly relates to a film transverse-drawing imidization heating device and a film transverse-drawing device, which are applied to polyimide films and comprise a furnace chamber, a plurality of groups of heating pipes are mounted in the furnace chamber and are linearly arranged, and the heating pipes are linearly arranged and are perpendicular to the film conveying direction; and two groups of infrared heating units are mounted on the heating pipe, and are symmetrically distributed at the edge part of the furnace chamber left and right. According to the utility model, on the premise of keeping the heating mode of the original traditional heating tube, the heating power of the edge part of the film is controlled by variable-frequency voltage-regulating stepless control, connecting three groups of infrared heating lamp tubes in parallel at the transverse pulling edge part of the furnace chamber and utilizing the PLC, the solid-state power controller and the actuator, so that the film edge part can be automatically adjusted in real time according to the color requirement of the edge part of the film; therefore, the effect of improving the edge color difference and performance of the film is achieved.

The utility model discloses a mask and a display module, relates to the mask technical field, the mask includes a plurality of mask units of different batches, the mask unit is provided with a plurality of lamp holes arranged in an array, each lamp hole penetrates through the two opposite surfaces of the mask unit, the lamp holes are used for installing lamp beads of the display module, and the lamp beads of the display module are arranged in the mask units. The projection area of the mask unit projected on the display module is less than or equal to 1 / 8 of the cross sectional area of the display module; according to the technical scheme, the color difference of the mask can be improved, and meanwhile the swelling and shadow abnormity of the mask can be improved; the mask can be formed by splicing a plurality of mask units of different batches, so that the worry of stocking chromatic aberration of mask suppliers can be effectively improved, and the timeliness of mask supply is improved; due to the fact that the size of the mask unit is small, thermal expansion and shrinkage of the mask are small, the stress of the mask on the lamp beads is effectively reduced, the risk of pulling and insufficient soldering is reduced, the trepanning precision of the mask is higher, and the abnormity of lamp foot leakage of an indoor product can be effectively improved.

The utility model relates to the technical field of near-to-eye display, and discloses an optical module and a head-mounted display device, the optical module is composed of a first optical element and a second optical element; the first side surface of the first optical element faces human eyes; the first side surface of the second optical element faces the second side surface of the first optical element, and the second side surface of the second optical element faces the display screen; the optical module satisfies the following conditions: 0 < = sin (theta1) / sin (theta2) < = 7; wherein theta1 is the maximum field-of-view principal ray incident angle of the first optical element, and theta2 is the maximum field-of-view principal ray emergent angle of the second optical element. According to the head-mounted display device, the refraction angle of the light between the lenses can be limited in a proper range while the size of the optical module is miniaturized, the imaging quality and the size of the optical module are well balanced, and the user experience is effectively improved while the miniaturization design requirement of the head-mounted display device is met.

The invention discloses a miniaturized large-light-flux high-resolution vehicle-mounted side view lens, which sequentially comprises a first lens L1, a second lens L2, a third lens L3, a diaphragm C, a fourth lens L4, a fifth lens L5 and a sixth lens L6 from an object side to an image side along an optical axis, and is characterized in that the first lens L1 is a meniscus negative lens or a biconcave negative lens with a concave surface facing the object side; the second lens L2 is a meniscus negative lens of which the concave surface faces the object side; the third lens L3 is a biconvex positive lens; the fourth lens L4 is a meniscus negative lens or a biconcave negative lens of which the concave surface faces the object side; the fifth lens L5 and the sixth lens L6 are both biconvex positive lenses. And the fourth lens L4 and the fifth lens L5 are tightly connected to form a gluing group. The vehicle-mounted side view lens has the advantages of being clear in imaging, small in size, high in light transmission and high in resolution.

This invention discloses a video lens and an electronic device. The video lens has an object side and an image side arranged opposite to each other along the optical axis. The video lens includes a lens barrel and a lens group disposed within the lens barrel. The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a photosensitive chip arranged sequentially from the object side to the image side. The video lens satisfies the following condition: 0.1≤FA / TTL≤0.25, where FA is the optical focal length of the video lens, and TTL is the distance between the object side surface of the first lens and the imaging surface of the video lens on the optical axis. Through the reasonable arrangement of the five lenses, the optical focal length FA and the total optical length TTL of the optical system of the video lens satisfy the relationship: 0.1≤FA / TTL≤0.25, and the distortion rate reaches below 3%, so as to provide a video lens with small size, low distortion rate, and 4K high pixel resolution.

The invention relates to a reversible temperature-induced multistage color-changing microcapsule which comprises a core material and a shell material wrapping the core material, the core material is a reversible thermochromic core material; the shell material is a colored layer formed by uniformly dispersing a water-soluble dye in a shell material matrix; the microcapsule is obtained by adding a water-soluble dye solution into a core material solution for emulsification and then adding the prepolymer of the shell material matrix; the core material solution comprises a non-ionic emulsifier, the water-soluble dye solution comprises an anionic emulsifier, and the water-soluble dye is an anionic dye or a non-ionic dyestuff. Through the microcapsule structure design, the reversible temperature-dependent multi-stage color-changing microcapsule with the average particle size being smaller than 1 micron is obtained, and the reversible temperature-dependent multi-stage color-changing microcapsule has the advantages that the reversible temperature-dependent multi-stage color-changing microcapsule is prepared; and meanwhile, a good color development effect of the reversible temperature-induced multi-stage color-changing microcapsule is ensured.

The application provides an optical imaging lens, which comprises, in sequence from the object side to the image side of the optical imaging lens: a first lens with positive refractive power; a second lens with negative refractive power; a third lens with positive refractive power, the object side surface of the third lens being a convex surface, and the image side surface of the third lens being a concave surface; and a fourth lens with positive refractive power, the object side surface of the fourth lens being a convex surface, and the image side surface of the fourth lens being a concave surface; wherein the following conditions are met: 0 < (R5+R6) / f3 < 6, where R5 is the curvature radius of the object side surface of the third lens, R6 is the curvature radius of the image side surface of the third lens, and f3 is the effective focal length of the third lens; V4 / V3 > 1, where V4 is the Abbe number of the fourth lens, and V3 is the Abbe number of the third lens; and 3

This invention relates to the field of optical lenses and discloses a camera optical lens comprising six lenses, arranged sequentially from the object side to the image side as follows: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power. The focal length of the camera optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, and the focal length of the fourth lens is f4. The radius of curvature of the object side of the first lens is R1, the radius of curvature of the image side of the first lens is R2, and the radius of curvature of the object side of the fourth lens is R7. The radius of curvature of the image side of the fourth lens is R8, the axial thickness of the first lens is d1, the axial thickness of the fifth lens is d9, the axial thickness of the sixth lens is d11, and the axial distance from the image side of the fifth lens to the object side of the sixth lens is d10; the total optical length is TTL, satisfying the following relationships: 0.350≤(d9+d10+d11) / TTL≤0.500; -12.00≤f4 / (R7-R8)≤-3.50; 12.00≤(f1-f2) / f≤35.00; -5.00≤f1d1 / (R1+R2)≤-0.45.

The utility model provides a telephoto lens and an unmanned aerial vehicle, the telephoto lens comprises at least four lenses which are sequentially arranged from an object side to an image side, at least one of the at least four lenses is a super lens, and the rest lenses are refractors; the at least four lenses are arranged such that the telephoto lens satisfies: f / EPDlt; 6, 6.0, (43.27 / IMGH) * fgt; 180, and f is the effective focal length of the telephoto lens; the EPD is the entrance pupil aperture of the telephoto lens; iMGH is the imaging height of the telephoto lens; meanwhile, imaging quality such as chromatic aberration is improved, light weight and miniaturization of the telephoto lens can be promoted, and the telephoto lens is suitable for application scenes of unmanned aerial vehicles.

This invention relates to the field of optics, specifically to a zoom lens and an imaging device. The zoom lens, from the object plane side to the image plane side, consists of a first fixed lens group with positive optical power, a zoom lens group with negative optical power, a second fixed lens group with positive optical power, a focusing lens group with negative optical power, and a third fixed lens group with positive optical power. The second fixed lens group includes two sets of cemented lenses; the third fixed lens group includes at least one lens with positive optical power. The zoom lens satisfies the following conditions: ft / fw > 20; TTL < 100mm; 2 < fG5 / fw < 3. By limiting the focal length of the third fixed lens group and the internal lenses, the third fixed lens group can effectively correct chromatic aberration and aberrations of the preceding lens groups, thus increasing the imaging quality of the zoom lens.