7results about How to "Improve aberration" patented technology

The application provides a large-aperture infrared confocal optical system and an application camera module thereof, which mainly comprises nine lenses, the first lens has a convex object surface, a concave image surface and a negative optical power, the second lens has a concave object surface, a convex image surface and a negative optical power, the third lens has a convex object surface, a concave image surface and a positive optical power, the fourth lens has a convex object surface and a convex image surface and a positive optical power, the fifth lens has a convex object surface, a concave image surface and a negative optical power, the sixth lens has a convex object surface and a convex image surface and a positive optical power, the seventh lens has a convex object surface and a convex image surface and a positive optical power, the eighth lens has a concave object surface, a convex image surface and a negative optical power, and the ninth lens has a convex object surface, a concave image surface and an optical power, the number of lenses is reasonable, the structure is simple, the optical power of the lenses is reasonably distributed, the lens aberration is optimized, the imaging quality of the optical system is improved, the characteristics of super wide angle, high illumination, day and night confocal and excellent temperature characteristics are considered, and the optical system has great potential in the IPC market.

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

The invention provides an ultra-short-focus projection lens and projection equipment, and belongs to the technical field of optical imaging. The ultra-short-focus projection lens comprises a first lens with positive focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power, a seventh lens with negative focal power, an eighth lens with positive focal power and a ninth lens with negative focal power. The system comprises a tenth lens with negative focal power, an eleventh lens with positive focal power, a twelfth lens with positive focal power, a thirteenth lens with positive focal power, a fourteenth lens with negative focal power, a fifteenth lens with negative focal power, a sixteenth lens with negative focal power and a concave reflector, therefore, the total optical length of the ultra-short-focus projection lens is controlled within 300mm, and the definition reaches 8K and above. According to the scheme, the ultra-short-focus projection lens which is small in size, high in resolution and good in athermalization is realized.

The application provides a low-distortion high-pixel optical system and an applied camera module, which are mainly composed of eight lenses, wherein the first lens has a convex object plane, a concave image plane and negative optical power; the second lens has a convex object plane, a concave image plane and negative optical power; the third lens has a concave object plane, a convex image plane and positive optical power; the fourth lens has a convex object plane and positive optical power; the fifth lens has a convex object plane, a convex image plane and positive optical power; the sixth lens has a concave object plane, a concave image plane and negative optical power; the seventh lens has a convex image plane and positive optical power; and the eighth lens has a convex object plane, a concave image plane and negative optical power. The application has reasonable lens number, simple structure, optimized lens aberration, improved resolution performance, wide angle, small distortion and high resolution, and is applied to a video conference equipment in a video transmission technology, so that image noise can be reduced, good imaging quality can be realized, and post-processing algorithm is facilitated.

This application provides a lens module and an electronic device. The lens module includes an imaging lens group, a light filter, and an image sensor, the imaging lens group includes a plurality of lenses whose optical axes mutually overlap, the plurality of lenses include a liquid lens, a plastic lens, and a functional optical element, the functional optical element is a functional lens and / or a diffractive optical element, and a refractive index temperature coefficient β of the functional lens meets: -9:optical-5≤β≤9×10-5. According to the lens module and the electronic device provided in embodiments of this application, the functional optical element is disposed in the imaging lens group including the liquid lens, so that a temperature effect problem of a lens module including a liquid lens in the conventional technology can be resolved.

The application discloses a projection lens, comprising a first lens group, an aperture and a second lens group arranged in sequence from the magnifying side to the reducing side, the first lens group comprises a first lens with negative diopter, a second lens with negative diopter and a third lens with positive diopter arranged in sequence from the magnifying side to the reducing side, and the second lens group comprises a fourth lens with positive diopter, a fifth lens with negative diopter, a sixth lens with positive diopter, a seventh lens with negative diopter, an eighth lens with positive diopter and a ninth lens with positive diopter arranged in sequence from the magnifying side to the reducing side. The application optimizes the number of lenses, the surface shape of each lens and the optical parameters of the lens, has simple structure, less lenses, reduces the occupied volume, meets the demand of miniaturization development, effectively improves the aberration of the system and suppresses the occurrence of system distortion, and improves the MTF performance.

This invention provides a low-distortion, small-volume, high-pixel optical system and its application in a camera module, mainly composed of seven lenses. The first lens has negative optical power and its image-side surface is concave; the second lens has positive optical power and its object-side surface is convex, as is its image-side surface; the third lens has optical power; the fourth lens has optical power; the fifth lens has positive optical power and its image-side surface is convex; the sixth lens has positive optical power and its object-side surface is convex, as is its image-side surface; and the seventh lens has negative optical power and its object-side surface is concave. The system features a reasonable number of lenses and a simple structure. By rationally allocating the optical power of the lenses, lens aberrations are optimized, improving the imaging quality of the optical system. It offers advantages such as low distortion, small size, large aperture, and high pixel count. Furthermore, the large aperture configuration increases the amount of light entering the optical system and provides even higher imaging quality.