113results about How to "Shorter overall optical length" patented technology

A factory prepared fiber optic distribution cable has at least one predetermined access location for providing access to at least one pre-connectorized optical fiber. The fiber optic distribution cable includes at least one preterminated optical fiber withdrawn from a tubular body at the access location, a connector attached to the preterminated optical fiber, a transition piece for transitioning the preterminated optical fiber from the tubular body into a protective tube, and a protective shell encapsulating the access location for protecting the pre-connectorized optical fiber. Alternatively, the fiber optic distribution cable includes at least one preterminated optical fiber withdrawn from a tubular body, a transition piece for transitioning the preterminated optical fiber from the tubular body into a protective tube, a connector attached to the preterminated optical fiber, a plurality of cable centralizers, and a protective shell for encapsulating the access location and protecting the pre-connectorized optical fiber.

Provided are a wafer scale lens, which is so short in an optical total length with respect to an image height that it can correct an aberration satisfactory, and an optical system including the wafer scale lens and having a thin lens element on the side closest to the image. The optical system includes a first lens having a positive refractive power relative to an object, and a second lens arranged on the side of the image of the first lens and having a recessed shape on the side of the object. At least one lens is arranged on the side of the second lens. When that one of the lenses arranged on the side of the image of the second lens, which is arranged on the side closest to the image, is an i-th lens (i>3), this i-th lens includes an i-th lens flat plate and is formed on the object side of the i-th lens flat plate but has a refractive index different from that of the i-th lens flat plate, and a lens element having a convex shape on the object side where the main light ray of the maximum image height passes. Moreover, the ratio between the optical axial distance (or the lens distance) between a (i−1)-th lens and the i-th lens and the optical axis distance (or the optical total length) from the object side face of the first lens to the image face is 0.01 to 0.15.

The invention discloses an imaging lens system. The imaging lens system comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and an aperture sequentially from an object side to an image side, wherein the first lens is provided with a positive flexion force; the surface of the object side of the first lens is a convex surface; the second lens is provided with a negative flexion force; the third lens is provided with a positive flexion force; at least one surface of the object side and the image side of the third lens is an aspheric surface; the surface of the image side of the fourth lens is an aspheric surface; the surface of the image side of the fourth lens is provided with at least one inflexion point; the surface of the object side of the fifth lens is a concave surface; at least one surface of the object side and the image side of the fifth lens is an aspheric surface; and the aperture is arranged between a shot object and the second lens. According to the configuration mode, the total optical length of the imaging lens system can be effectively shortened, the sensitivity of an optical system can be reduced and the imaging property of the system can be improved.

An image lens array, from object side, comprises a first lens, an aperture, a second lens and a third lens. The first lens is a positive meniscus lens with a convex surface facing the object side; the second lens is positive meniscus lens with a convex surface facing the image side; the third lens is a positive meniscus lens with a convex surface facing the object side; and the first lens, the second lens and the third lens are made of the same plastic material, a focal length of the image lens array is f, a combined focal length of the first and second lenses is f12, a relation between the f and f12 can satisfy the equation: 1.0<f12 / f<1.3.

An optical lens assembly for image taking, sequentially arranged from an object side to an image side, comprising: the first lens element with positive refractive power having a convex object-side surface; the second lens element with negative refractive power having a convex object-side surfaces and a concave image-side surface; the third lens element with positive refractive power having a convex image-side surface; the fourth lens element with refractive power having two aspheric optical surfaces; the fifth lens element with refractive power having a concave object-side surface and both aspheric optical surfaces; an image sensor disposed on an image plane and a stop provided for imaging a photographed object; specific relations being satisfied. Thereby, the optical lens assembly for image taking has good aberration correction, and can shorten the total length for use in compact cameras and mobile phones requiring high resolution.

The present disclosure provides an optical image capturing lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power having a convex image-side surface; a second lens element; a third lens element; a fourth lens element, at least one of an object-side surface and an image-side surface thereof being aspheric; a fifth lens element, at least one of an object-side surface and an image-side surface thereof being aspheric; and a sixth lens element with negative refractive power having a concave image-side surface, at least one of an object-side surface and the image-side surface thereof being aspheric, at least one inflection point being formed on at least one of the surfaces thereof. With the aforementioned arrangements, the sensitivity of the optical system can be attenuated while the aberration and astigmatism can be effectively corrected to improve the image quality.

The invention discloses an optical imaging lens comprising a first lens which has positive refractive power and a convex object side surface; a second lens which has negative refractive power and a convex object side surface and a concave image side surface; a third lens which has positive refractive power; a fourth lens which has negative refractive power; a fifth lens which has positive refractive power, wherein the position of the object side surface close to the optical axis is a convex surface and the area away from the optical axis is a concave surface, the object side surface is provided with at least one point of inflexion, the position of the image side surface close to the optical axis is a convex surface and the object side surface and the image side surface are aspheric surfaces; and a sixth lens which has negative refractive power, wherein the positions of the object side surface and the image side surface close to the optical axis are concave surfaces, the image side surface is provided with at least one point of inflexion and the object side surface and the image side surface are aspheric surfaces. According to the optical imaging lens, miniaturizing and lightweightand thinning can be met and the aberration and astigmatism can be reasonably corrected so that the imaging frame has low distortion and high definition. The invention also discloses photographing equipment comprising the optical imaging lens.

The invention discloses an imaging optics lens group which sequentially comprises 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 and a fifth lens from an object side to an image side, wherein the object side surface of the first lens is a convex surface; the objectside surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; the image side surface of the fourth lens is a concave surface, and the object side surface and the image side surface of the fourth lens are both aspheric surfaces; and the image side surface of the fifth lens is a concave surface, and the object side surface and the image side surface of the fifth lens are both aspheric surfaces. The imaging optics lens group is additionally provided with an aperture and an electronic photosensing unit for imaging a shot object, wherein the aperture is arranged between the shot object and the second lens, and the electronic photosensing unit is arranged at an imaging surface. Through the arrangement way of the lens group in the invention, the volume of the lens group can be effectively reduced, the sensitiveness of an optics system can be lowered, and higher resolution can be obtained.

A zoom lens system comprising a first lens unit of negative power, a second lens unit of positive power and a third lens unit of positive power, wherein in zooming, the lens units move respectively along an optical axis so that an interval of first lens unit and second lens unit decreases while an interval of second lens unit and third lens unit changes with variable magnification, the first lens unit comprises one object side negative lens element and one image side positive lens element, which have an aspheric surface, and the conditions: n 12>1. 88, ν12<26 and 5.0<αiW<20.0 (ωW>30, n12 and ν12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit, αi W is an incident angle of the principal ray onto the image sensor at the maximum image height at a wide-angle limit) are satisfied.

The invention provides an optical imaging lens group. The optical imaging lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side, wherein the first lens has positive refractive power, and the surface of the object side of the first lens is a convex surface; the second lens has negative refractive power; and the surface of the image side of the fifth lens is a concave surface and has at least one point of inflexion. In a lens configuration mode, the optical imaging lens group has a large viewing angle, system sensitivity is reduced, and high resolution power can be obtained.

A lens unit includes a front group, a stop, and a rear group, in order from the object side toward the image side. The front group includes at least: a first lens having a negative meniscus shape; a negative second lens formed from a plastic and having an aspherical surface; and a positive third lens, in order from the object side toward the image side. The rear group includes at least: a positive first lens; and a negative second lens, in order from the object side toward the image side.

The invention discloses an optical lens group for shooting, which comprises a first lens with positive refractive power, a second lens with negative refractive power, a third lens with the positive refractive power, a fourth lens with the negative refractive power and a fifth lens, and is also provided with an aperture and an electronic light sensitive element for imaging a shot object, wherein an object side surface of the first lens is a convex surface; an object side surface and an image side surface of the second lens are concave surfaces; an object side surface and an image side surface of the fourth lens are concave surfaces; at least one surface in the object side surface and the image side surface of the fourth lens is an aspheric surface; an object side surface of the fifth lens is a convex surface, and an image side surface of the fifth lens is a concave surface; at least one inflection point is arranged on the image side surface of the fifth lens; the fifth lens is made of a plastic material; and the aperture is arranged between the shot object and the third lens. Due to the configuration mode of the lens group, the volume of the lenses can be effectively reduced, the sensitivity of an optical system is reduced, and higher image resolution can be acquired.

The invention discloses a photographing optical lens. The optical lens comprises a first lens with positive refractive power, a second lens with negative refractive power, a third lens with the positive refractive power and a fourth lens with the negative refractive power from an object side to an image side in turn and is provided with a diaphragm, wherein an object side surface of the first lens is a convex surface; an image side surface of the second lens is a concave surface; an image side surface of the fourth lens is a concave surface, and an object side surface and the image side surface of the fourth lens are aspheric surfaces; and the diaphragm is arranged between the first lens and the second lens. In the invention, four lenses with refractive power are arranged in the photographing optical lens.

The invention discloses an optical shot for image capture. The optical shot comprises five lenses with refractive power, which, from an object side to an image side, are sequentially a first lens with positive refractive power, a second lens with negative refractive power, a third lens, a fourth lens with positive refractive power and a fifth lens with negative refractive power, wherein the object side surface of the first lens is a convex surface; the object side surface of the second lens is a concave surface; the object side surface of the fourth lens is a convex surface, and at least one surface of the object side surface and the image side surface of the fourth lens is an aspheric surface; and the object side surface of the fifth lens is a concave surface, and at least one inflectionpoint is formed on the image side surface of the fifth lens. The optical shot for image capture is also provided with an aperture and an electric photosensitive element for imaging a photographed object; and the aperture is arranged between the photographed object and the second lens. Through the mode of configuring the lens group, the shot volume can be effectively reduced, the sensitivity of anoptical system can be reduced, and higher resolution power can be acquired.

A zoom lens system comprising a first lens unit of negative power, a second lens unit of positive power and a third lens unit of positive power, wherein in zooming, the lens units move respectively along an optical axis so that an interval of first lens unit and second lens unit decreases while an interval of second lens unit and third lens unit changes with variable magnification, the first lens unit comprises one object side negative lens element and one image side positive lens element, which have an aspheric surface, and the conditions: n12>1. 88, v12<26 and 5.0<alphaiW<20.0 (omegaW>30, n12 and v12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit, alphai W is an incident angle of the principal ray onto the image sensor at the maximum image height at a wide-angle limit) are satisfied.

An optical image stabilizer includes an optical system including at least one image shake counteracting optical element movable in a plane orthogonal to an optical axis; at least one stepping motor for moving the image shake counteracting optical element in the plane; at least one shake velocity sensor which senses the speed of shake applied to the optical system; and a controller which calculates the number of driving pulses for the stepping motor based on shake speed information output from the shake velocity sensor, and drives the stepping motor so that the image shake counteracting optical element moves in the plane to counteract image shake on an imaging surface of the optical system. The controller changes power supplied to the stepping motor in accordance with the shake speed information when driving the stepping motor.

The invention discloses an image taking optical lens system. The image taking optical lens system sequentially comprises a first lens, a second lens and a third lens from an object side to an image side, wherein the surface of the object side of the first lens is a convex surface and the surface of the image side of the first lens is a concave surface; the surfaces of the object side and the image side of the second lens are non-spherical surfaces; the surfaces of the object side and the image side of the third lens are non-spherical surfaces; at least one inflection point is arranged on at least one of the surfaces of the object side and the image side of the third lens; and an aperture is arranged between the first lens and the second lens. In the image taking optical lens system, the three lenses with inflectional forces are provided; the focus of the image taking optical lens system is f; the focus of the first lens is f1; the curvature radius of the surface of the object side of the first lens is R1; the curvature radius of the surface of the image side of the first lens is R2; the thickness of the second lens on an optical axis is CT2; and the parameters meet the following relation formulas: the absolute value of f / f1 is less than 0.58, R1 / f is more than 0.20 and less than 0.65, R2 / f is more than 0.00 and less than 2.40, and CT2 is more than 0.10mm and less than 1.00mm.

Conventional wide angle lenses each do not have such features that an optical length is short, a back focus is long to the extent possible, a good image is obtained, and sufficient brightness is provided. In other words, it is difficult to perform sufficient correction of chromatic aberration and achieve sufficient downsizing. Provided is a wide angle lens provided with a first lens L1, a second lens L2, a third lens L3, an aperture stop S, and a fourth lens L4. The wide angle lens is configured by arranging the first lens L1, the second lens L2, the third lens L3, the aperture stop S, and the fourth lens L4 in this order from the side of an object toward the side of an image. The first lens L1 is a meniscus lens having a negative refractive power, the convex surface of which faces the side of the object. The second lens L2 is a meniscus lens having a positive refractive power, the convex surface of which faces the side of the image. The third lens L3 and the fourth lens L4 are lenses having the positive refractive power.

The invention discloses an image pickup lens. With the image pickup lens adopted, the problem that the field-of-view angle of a three-piece lens in the prior art is relatively small can be solved. According to the technical schemes of the invention, the image pickup lens includes three sets of lenses which are arranged sequentially along an optical axis from an object side to an image side. The first lens is a negative-optical power lens, and the image-side surface of the first lens is a concave surface. The second lens is a positive-optical power lens, and the object-side surface of the second lens is a convex surface. The third lens is a positive-optical power lens, and the image-side surface of the third lens is a convex surface. The lenses satisfy a relationship that -0.9<f1 / f<-0.5, wherein f1 is the focal length of the first lens, and f is the effective focal length of the entire image pickup lens. According to image pickup lens of the present invention, a simplified three-piece lens design is adopted; the optical power, concave surfaces and convex surfaces of the lenses are combined, and therefore, the total optical length of the image pickup lens can be effectively reduced,and a requirement for a wide field-of-view angle can be satisfied, and imaging quality can be improved.

The present invention relates to an imaging lens with an F-number in the range 2.0 to 4.0, configured from only two lenses, with a short lens optical length, and with sufficiently high image contrast so that sharp images are obtained. The imaging lens is configured by positioning, in order from an object side to an image side, an aperture diaphragm, a first lens, a second diaphragm, and a second lens, satisfying the following conditions. The first lens and second lens are both meniscus-shaped with convex surface facing the object side, and have positive refractive power. 0.3<f1 / f2<1.0   (1) 0.4<bf / f<0.5   (2) 1.0<d / f<1.3   (3) 0.12<D2 / f<0.30   (4) 2.0<Fno<4.0   (5) Here f is the combined focal length of the imaging lens, f1 is the focal length of the first lens, f2 is the focal length of the second lens, bf is the distance (in air) from the image-side surface of the second lens to the image plane, d is the distance (in air) from the object-side surface of the first lens to the image plane, D2 is the interval between the first lens and the second lens, and Fno is the F-number.

A zoom lens system, in order from an object side to an image side, comprising a first lens unit having negative optical power, a second lens unit having positive optical power, a third lens unit having positive optical power, and a fourth lens unit having positive optical power, wherein in zooming, the intervals between the respective lens units vary, and the condition (I-1): 2ωW / FW≧34 (fT / fW>2.0, ωW: a half view angle (°) at a wide-angle limit, FW: an F-number at a wide-angle limit, fT: a focal length of the entire system at a telephoto limit, fW: a focal length of the entire system at a wide-angle limit) is satisfied, having a high resolution and a short overall optical length (overall length of lens system), and still having a view angle of 70° or greater at a wide-angle limit, which is satisfactorily adaptable for wide-angle image taking, and yet having a large aperture with an F-number of about 2.0 at a wide-angle limit; an imaging device; and a camera.

The invention provides an image capturing lens group, from an object side to an image side, which orderly comprises a first lens, a second lens, a third lens, a fourth lens and an aperture, wherein the first lens has positive refractive power, and an object side surface of the first lens is a convex surface; the second lens has negative refractive power; the third lens has the positive refractive power, and the object side surface of the third lens the concave surface while an image side surface thereof is the convex surface, and the object side surface and the image side surface of the third lens are both aspheric surfaces; the fourth lens has the negative refractive power, the image side surface of the fourth lens is the concave surface provided with at least one inflection point, and the object side surface and the image side surface of the fourth lens are both aspheric surfaces; and the aperture is located between a photographed object and the first lens. Only four of the lenses of the image capturing lens group have the refractive power. With the configuration mode of the lens group, volume of a camera lens can be reduced, sensitivity of an optical system is reduced, and higher resolving power can be obtained.

The invention discloses an optical image acquiring lens group sequentially comprising a first lens of positive refractive power, a second lens of negative refractive power, a third lens, a fourth lens, a first diaphragm and a second diaphragm from an object side to an image side, wherein the surface of the object side of the first lens is a convex side; the surface of the object side of the second lens is a convex side, and the surface of the image side of the second lens is a concave side; the surface of the image side of the third lens is a convex side, and the part of the surface of the image side of the third lens at the periphery of a lens in an effective diameter inclines towards the image side; the surface of the image side of the fourth lens is a concave side; the first diaphragm is arranged between a shot object and the first lens; and the second diaphragm is arranged between the second lens and the fourth lens. Through the lens group configuration way, the total length of the lens can be effectively shortened, the system sensitivity can be lowered, and favorable imaging quality can be obtained.

The invention provides a shooting optical system. From an object side to an image side, the system sequentially comprises: a first lens with a positive refraction power, wherein the object side surface is a convex side; a second lens with a negative refraction power, wherein the object side surface is the convex side, the image side surface is a concave side and at least one surface of the object side surface and the image side surface is aspheric; a third lens, wherein the object side surface and the image side surface are aspheric and at least one surface of the object side surface and the image side surface is provided with a point of inflection. The shooting optical system is provided with an aperture and an electronic photosensitive component which are used to help an object imaging. The aperture is arranged between the object and the first lens. And the shooting optical system is provided with three lenses with the refraction power.

The invention discloses an optical photographic system, which comprises four lenses with refracting power, sequentially comprising a first lens, a second lens with a positive refracting power, a third lens with a negative refracting power and a forth lens with a positive refracting power from the object side to the image side, wherein at least one of an object side surface and an image side surface of the second lens is an aspheric surface; an object side surface of the third lens is a concave surface; an image side surface of the third lens is a convex surface; the object side surface and the image side surface of the third lens are aspheric surfaces respectively; an object side surface and an image side surface of the fourth lens are aspheric surfaces respectively; and the optical photographic system also comprises an aperture which is arranged between an photographed object and the second lens. In the configuration mode of the lens group, the total length of the lenses can be effectively shortened, a wider viewing angle is provided and favorable imaging quality can be obtained.

An imaging lens including the first˜fifth lens arranged in sequence from an object side to an image side is provided. The first lens has at least one aspheric surface. The second lens with negative optical power has at least one aspheric surface and a convex surface facing towards the object side. The third lens with positive optical power has at least one aspheric surface and a concave surface facing towards the object side. The fourth lens with negative optical power has at least one aspheric surface and a concave surface facing towards the image side. The fifth lens with positive optical power has at least one aspheric surface and a convex surface facing towards the object side. By the above arrangement, the imaging lens has a shorter optical total length and a larger aperture for enhancing the image quality.

The embodiment of the invention relates to the technical field of optical projection, and discloses a projection lens and a projection system. The projection lens comprises a guiding display componentgroup, a lens component group and a reflection optical component group, wherein the guiding display component group is used for converting an illumination light beam incident from a first direction into a projection light beam and enabling the projection light beam to emit in a second direction; the lens component group is used for receiving and transmitting the projection light beam output by the guiding display component group; and the reflection optical component group includes a first polarization beam splitting component, a quarter-wave plate and a curved surface reflector, the first polarization beam splitting component is arranged at the light emitting side of the lens component group, the quarter-wave plate and the curved surface reflector are arranged at one side of the first polarization beam splitting component, and the quarter-wave plate is arranged between the first polarization beam splitting component and the curved surface reflector. According to the above mode, the embodiment of the invention can reduce the total optical length of the device and guarantee the satisfaction of imaging quality such as a large view angle.