5results about How to "Aberration correction" patented technology

The invention relates to a light and miniature big-target-surface low-light lens, and the lens comprises a front lens group A, a diaphragm B and a rear lens group C, wherein the front lens group A, the diaphragm B and the rear lens group C are sequentially arranged in an incident direction of an optical path. The front lens group A includes a positive meniscus lens A1, a negative meniscus lens A2,a biconcave lens A3 and a biconvex lens A4, wherein the positive meniscus lens A1, the negative meniscus lens A2, the biconcave lens A3 and the biconvex lens A4 are sequentially arranged in an incident direction of the optical path. The biconcave lens A3 and the biconvex lens A4 are in close connection with each other as a first bonding group. The rear lens group C includes a biconcave lens C1, abiconvex lens C2, a biconvex lens C3, a plano-convex lens C4 and a negative meniscus lens C5, wherein the biconcave lens C1, the biconvex lens C2, the biconvex lens C3, the plano-convex lens C4 and the negative meniscus lens C5 are sequentially arranged in an incident direction of the optical path. The biconcave lens C1 and the biconvex lens C2 are in close connection with each other as a secondbonding group. The invention also relates to an imaging method of the lens. The lens is reasonable in design, effectively improves the imaging quality under the requirement of the large target surfaceof the lens, reduces the number of optical lenses, and realizes light and miniature lens. The lens has strong light collecting and light transmitting ability, and the target surface of the lens is large. The lens is high in optical resolution, is large in angle of view, and is large in observable range.

The application discloses a zoom lens and an imaging device, the zoom lens comprising a lens barrel, a light source and a lens group, the lens group comprising a fixed group, a zoom group, a compensation group and an image plane arranged in sequence from an object side to an image side, the zoom group and the compensation group moving along the optical axis direction, the compensation group being used for adjusting the imaging distance when the zoom group zooms, the fixed group comprising a first cylindrical lens and a second free-form surface lens, the first cylindrical lens shaping the light beam projected by the light source in the x direction, and the second free-form surface lens shaping the light beam projected by the first cylindrical lens in the y direction, so that the zoom lens has a strong shaping effect, can stretch the light rays in two directions, and maximally compresses the volume, and the free-form surface has high surface type freedom degree, can effectively correct the light aberration, and increases the definition around the final light spot, so as to solve the problems of poor aberration correction ability, large volume and low zoom ratio of the existing laser lens.

The utility model discloses a large-aperture half-frame lens, which belongs to the technical field of optical lenses and comprises a first lens group, a second lens group, a third lens group and a fourth lens group which are sequentially arranged from an object side to an image side along an optical axis. The focal lengths of all the lens groups meet the following conditional expressions: 1.2 < f (G1) / f (G2-G4) < 3.7; -3.8 < f (G3) / f (G2-G4) <-1.3; 1.6 < f (G1) / f < 4.8. According to the large-aperture half-frame lens, various aberrations of various wave bands are corrected, the central field of view and the edge field of view have enough resolution, the large-aperture half-frame lens has the advantages of being simple in structure, small in size and large in aperture, and the high resolution of imaging with the object distance from infinity to close distance can be achieved.

The utility model discloses a full-frame large-aperture lens, and belongs to the technical field of optical lenses, and the full-frame large-aperture lens comprises a first lens group, a second lens group, a third lens group and a fourth lens group which are sequentially arranged from the object side to the image side along an optical axis. The focal lengths of all the lens groups meet the following conditional expressions:-3.2 < f (G1) / f (G2-G4) <-1.7; -3.4 < f (G3) / f (G2-G4) <-1.9; -3.3 < f (G1) / f <-1.8; f (G4) / f (G2-G4) is greater than 1.3 and less than 2.5. According to the full-frame large-aperture lens, various aberrations of various wave bands are corrected, the central field of view and the edge field of view have enough resolution, the full-frame large-aperture lens has the advantages of being simple in structure, small in size and large in aperture, and the high resolution of imaging of the object distance from infinity to close distance can be achieved.

The application discloses a projection lens and a display system. The projection lens comprises a display device, a lens assembly and an aperture stop arranged in sequence along a preset direction. The lens assembly comprises a plurality of lenses arranged along the preset direction. Wherein, 6mm≤f≤10mm, 26°≤FOV≤40°, 3mm≤h≤6mm, 4mm≤R≤10mm, 9mm≤L≤15mm. f is the focal length of the lens assembly, FOV is the field of view of the lens assembly, h is the aperture of the aperture stop, R is the aperture of the lens assembly, and L is the distance between the display device and the aperture stop along the preset direction AA. By reasonably designing the parameters of the lens assembly and the aperture stop, and adjusting the distance between the lens assembly and the aperture stop, various aberrations of the projection lens can be effectively corrected, the projection lens has the advantages of high resolution and small optical distortion, and the requirements of high resolution and high-quality imaging of the AR display device can be met.