21 results about "Half field" patented technology

The utility model discloses an optical imaging lens. The optical imaging lens comprises an imaging lens group and a spacing element group which are arranged in a lens barrel, the imaging lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from the object side to the image side along the optical axis; the spacing element group comprises a fifth spacing element arranged on the image side of the fifth lens; the optical imaging lens satisfies the following conditions: 68.00 degree lt; the Semi-FOV is less than or equal to 74.24 degrees, (R12 + R9) / (R12-R9) is more than or equal to 0.76 and less than or equal to 2.46, and (D5s-d5s) / CP5 is more than or equal to 0.94 and less than or equal to 2.73; the Semi-FOV is the maximum half field angle of the optical imaging lens, the R9 is the curvature radius of the object side surface of the fifth lens, the R12 is the curvature radius of the image side surface of the sixth lens, the D5s is the outer diameter of the object side surface of the fifth spacing element, the d5s is the inner diameter of the object side surface of the fifth spacing element, and the CP5 is the maximum thickness of the fifth spacing element.

An imaging lens includes a first, second, third, fourth, fifth, and sixth lens. The first lens is a meniscus lens with negative refractive power and includes a convex surface facing the object side and a concave surface facing the image side. The second lens has refractive power and includes a concave surface facing the object side. The third lens has refractive power and includes a convex surface facing the image side. The fourth lens has refractive power and includes a convex surface facing the image side. The fifth lens has refractive power. The sixth lens is a biconvex lens with positive refractive power. The imaging lens satisfies the condition: 87mm. 2 ≤fLL×TTL≤111mm 2 Or condition: 12 degrees / mm ≤ HFOV / fLL ≤ 17 degrees / mm; where fLL is the effective focal length of the lens closest to the image side, TTL is the distance from the object side of the first lens to the imaging surface along the optical axis, and HFOV is the half field of view of the imaging lens.

The application discloses an optical imaging lens, which comprises first, second, third, fourth, fifth and sixth lenses in sequence from the object side to the image side. A circumferential area of the object side of the first lens is concave; a circumferential area of the image side of the second lens is concave; a circumferential area of the image side of the third lens is convex; an optical axis area of the object side of the fifth lens is convex; the first, fourth and sixth lenses have positive refractive power, and satisfy 28.000≤HFOVD21t42 / (D11t21+D42t62), so that the advantages of large field of view, small aperture value and good imaging quality can be achieved. HFOV represents the half field of view of the optical imaging lens, D21t42 represents the distance on the optical axis from the object side of the second lens to the image side of the fourth lens, D11t21 represents the distance on the optical axis from the object side of the first lens to the object side of the second lens, and D42t62 represents the distance on the optical axis from the image side of the fourth lens to the image side of the sixth lens.

The application provides an optical imaging lens, comprising seven lenses, a plurality of spacer elements and a lens barrel; the inner diameter d0s of the object side end surface of the lens barrel and the inner diameter d0m of the image side end surface of the lens barrel satisfy 1 < d0s / d0m < 2; the maximum half field angle Semi-FOV of the optical imaging lens and the F number FNO of the optical imaging lens satisfy -3 < tan (Semi-FOV) / FNO < -2; the inner diameter d1s of the object side surface of the first spacer element, the effective focal length f1 of the first lens, the inner diameter d6s of the object side surface of the sixth spacer element and the effective focal length f7 of the seventh lens satisfy -2 < d1s / f1+d6s / f7 < 0. The application solves the problem of serious stray light of the optical imaging lens in the prior art.

The application discloses a VR optical system and a near-eye display device, the VR optical system comprising an optical lens close to an eye side and at least one microlens array close to a display side; the optical lens has positive focal power, the optical lens has a first surface close to the eye side and a second surface away from the eye side, at least one of the first surface and the second surface is aspherical, and the first surface is convex; the microlens array has a plurality of microlens units, and the plurality of microlens units have the same or different focal lengths; wherein the VR optical system satisfies a condition formula: 1.5 < TTL / (f*tanθ) < 3, TTL represents the total optical length of the VR optical system, f represents the effective focal length of the VR optical system, and theta represents the maximum half field angle of the VR optical system. By setting the optical lens and the microlens array, multiple fields of view can be established, the field of view in each small range is optimized, and therefore clearer imaging quality can be obtained, and the resolving power of the VR system is improved.

This invention provides an optical camera lens, comprising: seven lenses, the seven lenses being sequentially arranged from the object side to the image side of the optical camera lens, including a first lens to a seventh lens; a plurality of support members, at least including a second support member located on the image side of a second lens and at least partially in contact with the image side surface of the second lens; and a lens barrel for accommodating the lenses and the support members; wherein the half field of view of the optical camera lens is greater than 100°; the radius of curvature R3 of the object side surface of the second lens, the radius of curvature R4 of the image side surface of the second lens, and the inner diameter d2s of the object side surface of the second support member satisfy the following: -2.8 < (R3 + R4) / d2s < -0.35. This invention solves the problem of severe stray light in existing optical camera lenses.

The application discloses an optical system and an optical device comprising the same. The optical system comprises a lens barrel, a lens assembly, a reflection assembly and a spacer assembly arranged in the lens barrel. The lens assembly comprises a first lens, a second lens and a third lens arranged in sequence from a first side to a second side along an optical axis. The spacer assembly comprises at least one spacer arranged between two adjacent lenses in the lens assembly. The lens barrel has a front end face facing the first side and a rear end face facing the second side. The maximum outer diameter of the front end face of the lens barrel is smaller than the maximum outer diameter of the rear end face of the lens barrel. The inner diameter d0m of the rear end face of the lens barrel, the maximum half field of view HFOV of the optical system and the maximum height L of the lens barrel along the optical axis direction satisfy the following relationship: 1.0 < tan(HFOV) x d0m / L < 1.5.

The application provides a CMS field of view calibration method, which comprises the following steps: determining the current horizontal direction and vertical direction pixel numbers of a camera according to the current orientation of the camera and the preset horizontal direction and vertical direction pixel numbers of the camera; calculating the horizontal half field of view angle and the vertical half field of view angle of the camera; calculating one or more horizontal reference angles and vertical reference angles according to one or more preset reference points and the center of the camera entrance pupil; determining the angle offset of the camera according to the eccentricity parameter of the camera; determining the horizontal reference angle and the vertical reference angle of the camera according to the angle offset, the horizontal reference angle and the vertical reference angle; comparing the horizontal half field of view angle and the vertical half field of view angle with the one or more horizontal reference angles and vertical reference angles to obtain a comparison result; and adjusting the installation angle or the field of view angle of the camera to meet the requirements according to the comparison result when the comparison result does not meet the requirements. The application also provides a CMS field of view calibration device and a camera.

The invention discloses an optical lens and a laser radar. The maximum full field angle of the optical lens is within the range of 8-35 degrees, and the angular resolution value AR05 of any position of the half field angle of the optical lens within the range of 0-5 degrees and the angular resolution value ARS of the maximum half field angle of the optical lens meet the condition that AR05 is smaller than or equal to 86.2% ARS.

The application discloses an optical imaging lens, which comprises: a lens group comprising, in sequence from an object side to an image side along an optical axis, a first lens, a second lens, a third lens and a fourth lens, wherein the first lens has positive refractive power; a plurality of spacer elements comprising at least four spacer elements; and a lens barrel for accommodating the lens group and the plurality of spacer elements, wherein a surface of at least one spacer element in the direction of the optical axis is in contact with an inner wall of the lens barrel; the height L of the lens barrel in the direction of the optical axis, the effective focal length f of the optical imaging lens, the outer diameter D0m of an image end face of the lens barrel close to the image side, the distance TD on the optical axis from the object side face of the first lens to the image side face of the fourth lens and the maximum half field of view Semi-FOV of the optical imaging lens satisfy: L / D0m+TD / [f*tan(Semi-FOV)]<1.5.

The invention provides a six-piece type optical lens group for a vehicle-mounted lens. The six-piece type optical lens group is sequentially composed of a first lens, a second lens, a third lens, an aperture, a fourth lens, a fifth lens and a sixth lens from the object side to the image side. The optical lens group satisfies the following conditional expression: 0.014 lt; (R7 + R8) / f4lt; 0.08 part of the composition; wherein R7 is the curvature radius of the object side surface of the fourth lens, R8 is the curvature radius of the image side surface of the fourth lens, and f4 is the focal length of the fourth lens; 1.8 lt, 1.8 lt; (AT45 + AT56) / CT5lt; 4.6); wherein AT45 is the air gap between the fourth lens and the fifth lens, AT56 is the air gap between the fifth lens and the sixth lens, and CT5 is the thickness of the fifth lens on the optical axis; 0.38 lt, 0.38 lt; r12 / f6lt; 1.4, 4; wherein R12 is the curvature radius of the image side surface of the sixth lens, and f6 is the focal length of the sixth lens. The optical distortion can be controlled within 1.8%-4.6% within the half field angle range of 78-83 degrees, and meanwhile, excellent chromatic aberration correction is achieved, so that the comprehensive defects of the field angle, distortion, system size and image quality in the prior art are overcome.

The application discloses an optical lens, which comprises, in sequence from an object side to an imaging surface along an optical axis, a first lens with negative focal length, the object side of which is a convex surface and the image side of which is a concave surface; a second lens with negative focal length, the object side of which is a concave surface; a third lens with positive focal length, the object side of which is a convex surface; a diaphragm; a fourth lens with positive focal length, the object side of which is a convex surface and the image side of which is a convex surface; a fifth lens with negative focal length; a sixth lens with positive focal length, the object side of which is a convex surface; and a seventh lens with negative focal length; wherein the image height IH corresponding to the maximum half field angle of the optical lens and the effective focal length f of the optical lens satisfy 1.0 < IH / f < 1.4. The application can effectively reduce the total length and volume of the optical lens and realize the characteristics of large field angle, small distortion, high pixels and the like.

This lens device comprises an optical system including a first lens group having negative refractive power and a rear group having positive refractive power, which are arranged in order from an object side to an image side, and in the optical system, the interval between adjacent lens groups changes during zooming, the rear group includes one or more lens groups and an aperture diaphragm, and a focusing group composed of one or a plurality of lens groups among the lens groups included in the rear group moves in the optical axis direction during focusing, and satisfies the conditional expression ωw > 85, where ωw (°) is the half field angle when infinity focused at the wide-angle end, the lens device being characterized by comprising a retaining member that retains the focusing group, and a drive member that moves the retaining member in the optical axis direction, the drive member and the aperture diaphragm overlapping in the direction orthogonal to the optical axis.

An optical imaging lens includes a first lens element, a second lens, an aperture stop, a third lens element and a fourth lens element from an object side to an image side in order along an optical axis, and each lens element has an object-side surface and an image-side surface. An optical axis of the image-side surface of the first lens element is convex and an optical axis of the image-side surface of the fourth lens element is concave. HFOV stands for the half field of view of the entire optical imaging lens and TTL is a distance from the object-side surface of the first lens element to an image plane along the optical axis to satisfy HFOV / TTL≤1.500° / mm.

The application discloses an optical lens, which comprises, in sequence from an object side to an image plane along an optical axis, an aperture stop, a first lens with positive refractive power, a second lens with positive refractive power, the object side of which is a convex surface, a third lens with positive refractive power, a fourth lens with positive refractive power, the image side of which is a convex surface, a fifth lens with negative refractive power, the object side of which is a concave surface and the image side of which is a convex surface, a sixth lens with positive refractive power, the object side of which is a concave surface and the image side of which is a convex surface near the optical axis, and a seventh lens with negative refractive power, the object side of which is a convex surface near the optical axis and the image side of which is a concave surface near the optical axis, wherein the image height IH corresponding to the maximum half field angle of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy 1.5 < IH / EPD < 1.9. The application can realize the balance of large aperture, small total length and long focal length by reasonably constraining the surface shape and refractive power of each lens.

The application discloses a kind of data correction method and device of micro-nano structure spectral camera, it is related to spectral imaging technical field.The method includes: the half field angle of spectral camera is symmetrically divided into several angle subzones along the direction of main optical axis, correspondingly different incidence angle range respectively;Original spectral data is preprocessed;The row image element of the same wavelength section in imaging sensor is divided according to angle subzone, and the mapping relationship with incidence angle is established;Each row image element is configured with micro-nano structure optical filter matching its incidence angle range;Select the image element data that incidence angle meets the response range of optical filter, and splice according to row order, generate corrected spectrum and output full-band correction result.Through the construction based on incidence angle mapping, image element partition, matching type micro-nano structure optical filter configuration and angle dominant data splicing strategy, full-band spectral data correction with high consistency, high precision and spatial continuity is realized.

The application discloses an optical imaging system, which comprises: a lens group sequentially comprising, from an object side to an image side along an optical axis, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with refractive power, a fifth lens with positive refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power, wherein the second lens is a meniscus lens; a plurality of spacer elements, comprising a fifth spacer element at least partially in contact with an image side surface of the fifth lens and a sixth spacer element at least partially in contact with an image side surface of the sixth lens; and a lens barrel for accommodating the lens group and the plurality of spacer elements; wherein the effective focal length f of the optical imaging system, the maximum half field angle Semi-FOV of the optical imaging system, the inner diameter d6m of the image side surface of the sixth spacer element, and the inner diameter d5m of the image side surface of the fifth spacer element satisfy: 2.5 < f x tan (Semi-FOV) / (d6m-d5m) < 11.5.

The present subject matter described an optical microscopy device (3) for a portable imaging system, such as a smartphone. The optical microscopy device (3) comprises an optical lens assembly with eight to fifteen lens elements. The optical lens assembly has an optical magnification in a range of about 1× to about 7.8×, an airy radius in a range of about 3 micron to about 23.25 micron, a depth of field in a range of about 20 micron to about 338 micron, a numerical aperture in a range of about 0.015 to about 0.115, a half field of view in a range of about 12 degrees to about 30 degrees, and a length in a range of about 6.5 millimeter (mm) to about 57 mm.

The application provides a wide-angle lens, which comprises, in sequence along an optical axis from an object side to an imaging surface, a first lens with negative optical power, the object side of which is a convex surface and the image side of which is a concave surface; a second lens with positive optical power, the object side of which is a convex surface near the optical axis; a third lens with positive optical power, the image side of which is a convex surface; and a fourth lens with positive optical power, the image side of which is a convex surface; and a mobile phone lens module; wherein the total optical length TTL of the wide-angle lens and the image height IH corresponding to the maximum half field angle of the wide-angle lens satisfy 2.6 < TTL / IH < 3.1. The application realizes the effects of large field of view, large aperture and miniaturization by reasonably matching the lens shapes and optical power combinations between the lenses.

The invention relates to the field of optics, in particular to a large-field-angle projection lens which sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, a diaphragm, a fourth lens with positive focal power, a fifth lens with negative focal power and a sixth lens with positive focal power from the object plane side to the image plane side. A seventh lens; the large-field-angle projection lens satisfies the following conditional expressions: HFOV is greater than 75 degrees; f is more than 1mm and less than 2mm; wherein f is the field angle of the large-field-angle projection lens, and HFOV is the half field angle of the large-field-angle projection lens. Through the setting of the parameters and the structure, the large field angle of the projection lens is realized, the projection lens can conveniently project a larger image, and the application range of the large field angle projection lens is enlarged.

The embodiment of the utility model relates to the technical field of fisheye lenses, in particular to a full-spherical fisheye lens. The full-spherical fisheye lens sequentially comprises a front lens group, a middle lens group and a rear lens group from an object side to an image side along an optical axis, the front lens group sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with positive focal power and a fifth lens with negative focal power from the object side to the image side along the optical axis; the middle lens group sequentially comprises a sixth lens with negative focal power and a seventh lens with positive focal power from the object side to the image side along the optical axis; the rear lens group sequentially comprises an eighth lens with positive focal power from the object side to the image side along the optical axis. The full spherical fisheye lens with the structure can achieve a larger maximum half field angle, the image quality of a spherical image projected by the full spherical fisheye lens also has higher definition, and the optical structure of the full spherical fisheye lens is also simpler.