117results about How to "Reduce Tolerance Sensitivity" patented technology

The invention relates to a camshaft assembly comprising an inner shaft, an outer tube rotatable relative to the inner shaft, and two groups of cams mounted on the outer tube, the first group of cams being fast in rotation with the outer tube, and the second group being rotatably mounted on the outer surface of the tube and being connected for rotation with the inner shaft by means of connecting members that pass through circumferentially elongated slots in the outer tube. In the invention, the outer tube surrounds the inner shaft with clearance and the members connecting different ones of the cams of the second group to the inner shaft are inclined relative to one another and act to locate the axis of the inner shaft relative to the outer tube.

The invention discloses an imaging lens, the imaging lens has a total effective focal length f and comprises a fist lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are arranged along the optical axis from the object side to the image side in sequence. The first lens and the fifth lens have negative focal power; the second lens, the fourth lens, the sixth lens and the seventh lens have positive focal power or negative focal power; the third lens has positive focal power, and an effective focal length f3 of the third lens and the total effective focal length f satisfies 1<f3/f<1.5.

A compact imaging lens system consists of a first positive aspheric lens element (1) on the object side and a second negative aspheric lens element (2) on the image side. The first lens element is a meniscus lens convex toward the image side, whereby the incident light beam can be diverged by the first concave surface (11) of the first lens element, and thus a wide area of the second convex surface (12) of the first lens element can be illuminated by the divergent light beam. The second negative aspheric lens element is provided mainly for correcting chromatic aberration and off-axis aberration.

The invention relates to a microscope objective lens which is composed of eleven lens bodies. The microscope objective lens comprises four double-bonding-lens sets and three single pieces. The microscope objective lens is provided with the hyper-hemispherical lens body with positive focal power, the positive meniscus lens body with the positive focal power, the biconvex lens body with the positive focal power, the two double-bonding-lens sets with the positive focal power, the first double-bonding-lens set with the negative focal power, the second double-bonding-lens set with the negative focal power, and the third double-bonding-lens set with the negative focal power starting from the object space. The objective lens is moderate in cost, reasonable in process, excellent in imaging quality and capable of meeting the requirement for mass production.

An imaging lens module includes a fixed diaphragm and an optical module. The optical module includes first, second, third and fourth lenses arranged from an object side to an image side in a sequence of: a diaphragm, the first lens being a double-convex lens, the second lens having a negative refractive power and a concave surface disposed towards the object side, the third lens having a positive refractive power and a meniscus lens with a convex surface disposed towards the image side, the fourth lens having a convex surface disposed towards the object side and a wavy surface disposed towards the image side and a concave surface disposed towards the image side near the optical axis. With the diaphragm of the imaging lens module and the lens arrangement of the optical module, the sensitivity of tolerance of a system can be lowered to achieve a high imaging quality and a good yield rate.

The invention relates to a large-aperture low-sensitiveness optical lens assembly which comprises a first lens, a second lens, a third lens and a fourth lens. The first lens is provided with positive light focal power, and the image side face of the first lens is a convex face. The second lens is provided with negative light focal power, and the object side face of the second lens is a concave face. The third lens is provided with an aspheric face and positive light focal power. The object side face of the fourth lens is a concave face, and the object side and the image side face are aspheric faces. The lens assembly meets the following relational expression: 0.3<F1/TLT<1.0, 0.7<F/TTL<1.3, and D3/D2<3. By means of the structure, when specific conditions are met, the lens assembly is beneficial for reducing the sensitivity of a system, promotes periphery resolution and illuminance, and improves the imaging effect.

The invention relates to a telecentric lens, and the telecentric lens comprises a first lens group (A), a pupil (S), and a second lens group (B), wherein the first lens group (A), the pupil (S) and the second lens group (B) are arranged in order from an object side to an image side along an optical axis. The first lens group (A) and the second lens group (B) are both positive power lens groups. The first lens group (A) includes four lenses, and the second lens group (B) includes three lenses. The telecentric lens of the invention has the characteristics of simple structure, expandable opticalpath, high magnification, high telecentricity, low distortion and insensitivity of the optical performances of the lens to the tolerance.

The invention discloses an optical lens, a camera module, an electronic device and a vehicle. The optical lens sequentially comprises a first lens with negative refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power and a sixth lens with positive refractive power from an object side to an image side, wherein the object side surface of the fourth lens is a convex surface near an optical axis; the optical imaging system further comprises a diaphragm. Theoptical lens satisfies the following relational expression: 12.6 mm < 2 * f * tan(FOV/2) <14.5 mm, f is the effective focal length of the optical lens, and FOV is the maximum field angle of the optical lens. The product of the effective focal length of the optical lens and the tangent value of half of the maximum field angle multiplied by 2 is between 12.6 mm and 14.5 mm, so that the distortion amount of the whole optical lens can be controlled, the distortion of the optical lens is small, the resolution capability of the optical lens is improved, the distortion risk of a picture shot at a large angle is reduced. And the imaging quality of the optical lens is improved.

The invention relates to a prime lens and an imaging system thereof, the prime lens comprises a first lens (101), a second lens (102), a third lens (103), a fourth lens (104) with positive focal power, a fifth lens (105) with negative focal power, a sixth lens (106) with negative focal power, a seventh lens (107) with positive focal power, an eighth lens (108), a ninth lens (109) and a tenth lens(110) with positive focal power, which are sequentially arranged from an object side to an image side; the fourth lens (104) and the fifth lens (105) are disposed in a mutually matching manner; and the sixth lens (106) and the seventh lens (107) are disposed in a mutually matching manner. The prime lens provided by the invention can effectively correct the chromatic aberration of a visible light path at a low cost via a simple structure and helps to reduce the spherical aberration of an infrared light path, and the performance of two paths is simultaneously improved by the simple structure.

The invention discloses an ultra-wide-angle lens and imaging equipment, and the ultra-wide-angle lens sequentially comprises,from an object side to an imaging surface along an optical axis, a first lens with negative focal power, wherein the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; a second lens with negative focal power, wherein the object side surface and the image side surface of the second lens are concave surfaces; a third lens with positive focal power, wherein the object side surface and the image side surface of the third lens are convex surfaces; a fourth lens with positive focal power, wherein the object side surface and the image side surface of the fourth lens are convex surfaces; a diaphragm; a fifth lens with positive focal power, wherein the object side surface and the image side surface of the fifth lens are convex surfaces; a sixth lens with negative focal power, wherein the object side surface and the image side surface of the sixth lens are concave surfaces, and the fifth lens and the sixth lens form a bonding body; and a seventh lens with positive focal power, wherein the object side surface and the image side surface of the seventh lens are convex surfaces near the axis. The ultra-wide-angle lens has the advantages of ultra wide angle, small temperature drift, low chromatic aberration and high resolution.

The invention discloses an optical imaging lens and imaging equipment. The optical imaging lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from anobject side to an image side along an optical axis, wherein the first lens has positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has negative focal power, the object side surface of the second lens is a concave surface at a paraxial position, and the image side surface of the second lens is a concave surface at a paraxial position; the third lens has positive focal power, the object side surface of the third lens is a convex surface at a paraxial position, and the image side surface of the third lens is a convex surface at a paraxial position; the fourth lens has positive focal power, the object side surface of the fourth lens is a convex surface at a paraxial position, and the image side surface of the fourth lens is a convex surface at a paraxial position; and the fifth lens with negative focal power has an object-side surface being concave in a paraxial position andan image-side surface being concave in a paraxial position. The optical imaging lens can clearly image in a high and low temperature range of -40 DEG C to +105 DEG C, and has the characteristics of small distortion, easy lens processing, low sensitivity, high imaging quality and clearer long-range object imaging.

The invention discloses a vehicle-mounted lens optical system. The vehicle-mounted lens optical system is successively provided with a first lens G01, a second lens P01, a third lens P02, a fourth lens P03 and a light filter P04 from an object side to an image side, wherein an aperture diaphragm L01 is arranged between the third lens P02 and the fourth lens P03, the first lens G01 has negative power, an object side surface S1 of the first lens G01 is a convex surface, an image side surface S2 of the first lens G01 is a concave surface, the second lens P01 has negative power, the second lens P01 is a biconcave lens, the third lens P02 has positive power, the third lens P02 is a biconvex lens, the fourth lens P03 has positive power, and the fourth lens P03 is a biconvex lens. The vehicle-mounted lens optical system has a relatively short lens total length and an ultra wide field.

The invention discloses a micro view-finding lens which comprises a first aspheric surface lens with positive diopter and a second aspheric surface with negative diopter, wherein the first lens is a lunes lens projecting to the imaging plane, which includes the concave plane against to the object and the convex plane opposite to the imaging plane for enlarging light beam on the concave plane and getting larger area on the convex plane to correct image difference and low error sensitivities. The second lens is a negative lens which employs aspheric design to compensate color difference, correct positive axle image difference and shorten the general length of the optical system.

The invention discloses a wide-angle lens and imaging equipment, and the wide-angle lens sequentially comprises a first lens with negative focal power from an object side to an imaging surface along an optical axis, wherein the object side surface is a convex surface, and the image side surface is a concave surface; a second lens having focal power, wherein the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; a third lens having positive focal power, wherein the image side surface of the third lens is a convex surface; a diaphragm; a fourth lens having positive focal power, whereinthe object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; a fifth lens having positive focal power, whereinthe object side surface of the fifth lens is a convex surface or a plane, and the image side surface of the fifth lens is a convex surface; a sixth lens having negative focal power, wherein the object side surface of the sixth lens is a concave surface; and a seventh lens having positive focal power, whereinthe object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface, wherein the fifth lens and the sixth lens form a bonding body. The wide-angle lens at least comprises an aspheric lens. The wide-angle lens has the advantages of large aperture, high pixel and good thermal stability.

The invention relates to an imaging lens which comprises a first lens group (G1) with positive focal power, a diaphragm, a second lens group (G2) with positive focal power and a third lens group (G3)with positive focal power or negative focal power which are sequentially arranged from an object side to an image side, and the third lens group (G3) is a fixed group. The first lens group (G1) and the second lens group (G2) form a focusing group capable of moving along an optical axis. The imaging lens is arranged according to the limitations, and can realize the characteristics of large aperture, high resolution, low distortion, uniform image quality, large depth of field, good color rendition degree and high contrast ratio.

The invention provides an optical lens. The optical lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an imageside. The first lens has negative focal power and a meniscus shape, the object side surface is a convex surface, and the image side surface is a concave surface; the second lens has negative focal power and a meniscus shape, the object side surface is a convex surface, and the image side surface is a concave surface; the third lens and the second lens are bonding lenses, the third lens has positive focal power and a meniscus shape, the object side surface is a convex surface, and the image side surface is a concave surface; the fourth lens has positive focal power and a biconvex shape, the object side surface is a convex surface, and the image side surface is a convex surface; the fifth lens has positive focal power and a biconvex shape, the object side surface is a convex surface, and theimage side surface is a convex surface; and the sixth lens has negative focal power and a meniscus shape, the object side surface is a concave surface, and the image side surface is a convex surface.According to the optical lens provided by the invention, the shapes of the lenses are optimally set, and the focal power of the lenses is reasonably distributed, so that the high-resolution, low-aberration, low-cost and relatively good temperature performance can be realized while the miniaturization of the lens is kept.