117results about How to "Optical total length" patented technology

The invention provides a camera module. The camera module comprises a first lens array, a second lens array, a liquid crystal shutter arranged between the first lens array and the second lens array, a controller, an image sensor and an image processor, wherein the first lens array comprises a plurality of first lens; the second lens array comprises a plurality of second lens which are respectively in optical alignment with the plurality of first lens one by one; the liquid crystal shutter is provided with a plurality of light-through holes; the plurality of transmission holes are respectively in optical alignment with the plurality of the first lens one by one; the controller is used for controlling every light-through hole of the liquid crystal shutter to open once in a shooting period; the image sensor is used for obtaining a sub-image corresponding to each light-through hole when each light-through hole in the shooting period is opened; and the image processor is used for synthesizing each sub-image corresponding to each light-through hole to an image by using a super-resolution image recovery technology.

The present invention provides an optical lens. The optical lens comprises: a first lens part including at least one first lens; a second lens part including a second lens barrel and at least one second lens installed in the second lens barrel, wherein the at least one first lens and the at least one second lens commonly form an optical system capable of imaging, and each of the at least one firstlens and the at least one second lens comprises at least one free-form surface lens; and a connection medium adapted to fix the first lens part and the second lens part together. The invention also provides a corresponding assembling method of an optical lens and a camera module and an assembling method thereof. The distortion of an optical lens with a small size and a large aperture can be reduced, the total optical length of the camera module can be reduced, the problem of the poor product caused by inaccurate positioning of the free-form surface lens in the rotation direction of the lens barrel can be effectively avoided, and the installation precision of the free-form surface lens can be effectively improved.

The invention belongs to the technical field of optical lenses, and particularly relates to a small-size wide-angle zoom lens. The small-size wide-angle zoom lens comprises a zooming group and a compensation group, wherein the total focal power of the zooming group is positive, and the total focal power of the compensation group is negative; the compensation group comprises a first lens, a second lens and a third lens which are sequentially arranged from the object side; the zooming group comprises a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged from the object side; and the fourth lens, the fifth lens, the sixth lens and the eighth lens are plastic aspherical lenses. Compared with the prior art, the zoom lens provided by the invention adopts a mixture of glass spherical lenses and the plastic aspherical lenses, because an aspheric surface has a higher aberration correction ability and can achieve higher performance, and the cost of an optical plastic material is far lower than that of optical glass. Therefore, perfect balance of size, performance and cost can be achieved by adopting the structure of mixing the glass lenses and the plastic aspherical lenses.

The invention provides an aspherical focal length-variable photoetching objective lens system, belonging to the technical field of optics, and aiming at solving the problem that the existing photoetching objective lens can not expose mask plate exposure patterns with different scale sizes by the same photoetching objective lens. The system provided by the invention from an object plane to an image plane sequentially comprises: the object plane, a first lens set, a second lens set, a third lens set, a fourth lens set, a fifth lens set and the image plane; the object plane is the plane where a mask plate is arranged; the first lens set is used for fixing the distance between the object plane and the first lens set of a focal length-variable system; the second lens set is used for changing the focal length of the photoetching objective lens and the size of the image plane; the third lens ser is used for compensating the movement of the image plane when a zooming group moves, so that the position of the image plane is invariably kept in the whole process of zooming; the fourth lens set has the negative power, the fifth lens set has the positive power, and a back fixed set consists of the fourth lens and the fifth lens, so that the invariable distance between the final lens of the photoetching objective lens which is near to one side of the image plane and the image plane can be guaranteed; and the image plane is the plane where an etching substrate is arranged.

The invention discloses an optical module and a head-mounted display device, the optical module comprises a display, a cemented lens, a light splitting member, a quarter-wave plate and a polarization reflection film, wherein the display emits light for imaging display; the cemented lens is arranged in the light emitting direction of the display and comprises a first lens and a second lens, the first lens and the second lens are sequentially arranged in the propagation direction of a light path, the second surface of the first lens and the third surface of the second lens are arranged in a cemented mode, and the third surface protrudes towards the direction of the display. The fourth surface of the second lens protrudes towards the direction away from the display; the light splitting member is arranged on the first surface of the first lens; the quarter-wave plate is arranged between the first lens and the second lens; the polarization reflection film is arranged between the quarter-wave plate and the second lens. According to the technical scheme, the total optical length of the optical system can be reduced, the size of the head-mounted display device is reduced, and a user can wear the head-mounted display device conveniently.

The invention relates to a compact type fog-penetrating high-definition television zoom lens and belongs to the field of photoelectric technology. The compact type fog-penetrating high-definition television zoom lens is characterized in that lens components sequentially arranged along the incidence direction of light include a front fixed lens group with positive focal power, a zoom lens group with negative focal powder, a compensation lens group with negative focal powder, an iris diaphragm, a rear fixed lens group with positive focal powder and a color filter; the front fixed lens group is sequentially provided with a gluing group and a positive crescent lens, and the gluing group is formed by a negative crescent lens and a biconvex lens which are closely connected; the zoom lens group is provided with a plano-concave lens and a second gluing group, and the second gluing group is formed by a biconcave lens and a second biconvex lens which are closely connected; the compensation lens group is provided with a third gluing group, and the third gluing group is formed by a second biconcave lens and a second positive crescent lens which are closely connected; the rear fixed lens group is sequentially provided with a third biconvex lens, a fourth gluing group, a third positive crescent lens and a second negative crescent lens, and the fourth gluing group is formed by a fourth biconvex lens and a third biconcave lens which are closely connected. By the compact type fog-penetrating high-definition television zoom lens, the defects that the resolution of a current wide-spectrum zoom lens cannot be matched with a high-definition camera, the detecting ability of the wide-spectrum zoom lens is lowered greatly in thick weather such as rain, snow and mist, and the image contrast and definition are affected evidently are overcome.

The invention discloses a lens. The lens comprises a first lens group, a second lens group, a third lens group, a fourth lens group and an imaging surface, which are sequentially arranged from an object side to an image side; the positions of the first lens group and the third lens group are fixed, and the second lens group and the fourth lens group can move along an optical axis; the lens group satisfies the following conditions: |f3/f short focus| is greater than or equal to 10 and is less than or equal to 17, and (TTL-D flat plate)/f long focus is greater than 4 and is less than 7, whereinthe f3 represents a focal length of the third lens group, the f short focus represents a system focal length of the lens in a short focus state, and the f long focus represents the system focal lengthof the lens in a long focus state, the TTL represents a total optical length of the lens, and the D flat plate represents the distance between the fourth lens group and the imaging surface. Accordingto the lens provided by the embodiment of the invention, the size and the aperture of a target surface of the lens are increased, the image resolution is relatively high, the image quality obtained in a low illumination scene is better, and the total optical length of the lens is reduced.

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 discloses an inner zoom lens, which comprises a first lens group with a positive refractive index, a second lens group with a negative refractive index, a third lens group with a positive refractive index, and a fourth lens group with a positive refractive index in sequence on an optical axis from an object to an image, wherein the first lens group for receiving light is fixed. Whena focal distance of the inner zoom lens changes from a wide angle end to a telephoto end, the second lens group moves towards the image, and the third lens group moves towards the object in order to increase spacing between the first and the second lens groups and shorten spacing between the second and the third lens groups. The fourth lens group moves in the process of focusing, can function as a compensation system in the process of zooming, and moves independently to perform a focusing action after moving together with the second and third lens groups simultaneously to perform a zooming action in order to compensate the movement of an imaging surface caused by zooming. The inner zoom lens disclosed by the invention has the characteristics of high optical zoom and large aperture, and can meet the requirements of short optical total length, good imaging performance, low manufacture cost and the like.

A miniature view-finding wide-angle lens is suitable for image capture products and comprises a first lens of negative diopter, a free curved prism of positive diopter, a second lens of positive diopter and a third lens of negative diopter. Wherein, the free curved prism is arranged in parallel with the first lens. The second lens and the third lens are positioned below the free curved prism and adjacent to an image space. The free curved prism is equivalent to that an aspheric lens coefficients are evaluated on a right-angled prism surface. A lens structure using the present invention can not only reduce total lens length, save cost and decrease common difference but also obtain better optical quality.

The invention provides a projection optical system which is formed by that twenty-two lenses which are divided into six lens groups are orderly arranged between an object plane and an image plane; wherein, the first, the third, the fifth and the sixth lens groups have positive focal power, and the second and the fourth lens groups have negative focal power. A negative meniscus lens is used in the projection optical system to correct the field curvature and the astigmatism and control the field curvature and astigmatism within the range of from minus 2nm to plus 2nm, and favorably realizes double telecentricity of the object space and the image space is better realized through introducing four aspheric surfaces, and thus both the telecentric errors of the object space and the image space are less than 1mrad. The projection optical system has larger working distance of the object space and the image space, and thereby providing a larger space for arranging a workbench, a reticle stage and an alignment system thereof.

The invention discloses a day and night dual-purpose imaging lens, which sequentially comprises along an optical axis from an object side to an imaging surface: a first lens with negative focal power, wherein the object side surface and the image side surface of the first lens are both concave surfaces; a second lens with negative 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 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 negative focal power, wherein the object side surface and the image side surface of the fifth lens are concave surfaces; a sixth lens with positive focal power, wherein the object side surface and the image side surface of the sixth lens are convex surfaces, and the fifth lens and the sixth lens form a cemented lens; 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. The applicable spectral ranges of the day and night dual-purpose imaging lens are 435-650 nm and 900-1100 nm. The day and night dual-purpose imaging lens provided by the invention has the characteristics of small size, low lens sensitivity, high imaging quality and the like, and has a day and night dual-purpose function.

The invention discloses a lens. In the embodiment of the invention, four lens groups are sequentially arranged in the lens according to a special sequence from an object side to an image side, the lens groups in the lens conforms to the conditions as follows: -1.0<=f2/[(f<W>'*f<T'>)<1/2>]<=-0.5, 0.56<=f4/[(f<W>'*f<T'>)<1/2>]<=1.16, and 0.2<=TTL/(BFL*f<W'>)<=0.5. The target size and aperture of thelens are improved to a certain extent, thus, the acquired image is relatively high in resolution, the transmittance quality of the lens can be enabled to be ensured under a low-illumination scene, the acquired image quality is relatively good, and the optical total length of the lens is reduced. Therefore, the embodiment of the invention provides a continuous zooming optical imaging lens which islarge in target, extra-large in aperture and high in resolution.

The invention discloses an optical module and a head-mounted display device. The optical module comprises a display which emits light for imaging display. A bonding lens is arranged in the light emitting direction of the display and comprises a first lens and a second lens which are sequentially arranged along the direction away from the display, the Abbe number of the material of the first lens is different from the Abbe number of the material of the second lens, a light splitting element is arranged on the first surface, and a flat plate element is arranged on the side, away from the first lens, of the second lens. The flat plate element is provided with a fifth surface facing the second lens, and a quarter-wave plate and a polarization reflection film are sequentially attached to the fifth surface in the direction away from the second lens. According to the technical scheme, the size of the head-mounted display device can be reduced by reducing the total optical length of the optical system, a user can wear the head-mounted display device conveniently, meanwhile, it is guaranteed that the chromatic aberration value of the imaged image is low, and the compensation pressure of imaging software on display pixels of the image in the later period is reduced.

The invention relates to an optical system, a camera module and electronic equipment. The optical system sequentially comprises a first lens element with positive refractive power from an object side to an image side along an optical axis, a second lens element with negative refractive power, a third lens element, a fourth lens element, a fifth lens element with negative refractive power, a sixth lens element with positive refractive power and a seventh lens element with negative refractive power, wherein the second lens element with negative refractive power has a convex object-side surface and a concave image-side surface in a paraxial region, respectively. the third lens is further included; the fourth lens is further included; the fifth lens element with negative refractive power is further included; the sixth lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof, and at least one of the object-side surface and the image-side surface is provided with an inflection structure; for the seventh lens element with negative refractive power, the image-side surface is concave in a paraxial region thereof, and at least one of the object-side surface and the image-side surface is provided with an inflection structure; the optical system satisfies the following conditional expression, ImgH/FNO is greater than 3.00 mm; ImgH is half of the image height corresponding to the maximum field angle of the optical system, and FNO is the number of apertures of the optical system. The optical system of the above design has a large image plane and high imaging quality.

The disclosed camera lenses are applicable to digital image product. The lens set includes following parts from object space to image space: crescent-shaped first lens, second lens in crescent-shape symmetrical to the first lens, third lens adjacent to the image space, a aperture located between first lens and second lens. The first and second lenses are made from plastic. The third lens is made from glass. Convex of the first lens faces to the object space. The convex of the second lens faces to the image space. Curvature radius of surface faced to image space of the third lens is larger than curvature radius of surface faced to object space.

The invention discloses an optical lens, a camera module and electronic equipment. The optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens; the object-side surface and the image-side surface of the first lens are a convex surface and concave surface, the object-side surface and the image-side surface of the second lens are a convex surface and concave surface, the image-side surfaces of the third lens and the fourth lens are convex surfaces, the object-side surface and the image-side surface of the fifth lens are a convex surfaces and a concave surface, the object-side surface and the image-side surface of the sixth lens are a concave surface and a convex surface, and the object-side surface and the image-side surface of the seventh lens are concave surfaces; and the optical lens satisfies the following relation: 6.5 mm < f * tan (HFOV) < 6.8 mm, f is the effective focal length of the optical lens, and HFOV is half of the maximum field angle of the optical lens. The optical lens, the camera module and the electronic equipment provided by the invention have the characteristics of large aperture and large image plane while satisfying the light, thin and miniaturized design, and improve the shooting quality.

A retarder includes a transparent support substrate, a prism layer including a plurality of microprisms arranged on one of main surfaces of the transparent support substrate, where each of the microprisms has a sloped prism face formed at the same slope angle with respect to the one main surface in the same direction, an optical anisotropic medium layer disposed on the sloped prism face so that an optic axis of the optical anisotropic medium layer is directed in one of a direction of the maximum sloped prism face of the microprisms and a direction perpendicular to the direction of the maximum sloped prism face, and a planarizing layer disposed on the transparent support substrate so as to embed the optical anisotropic medium layer therein. The planarizing layer is formed from a material having an index of refraction that is substantially the same as that of the microprisms.

The invention provides a miniature taking lens, which is applicable to a mobile phone and a miniature digital camera. The miniature taking lens comprises an aperture diaphragm, a first lens and a second lens sequentially from an object end to an image end, wherein the first lens is crescent-shaped, and the convex surface of the first lens faces the object end; the second lens is crescent-shaped, and the convex surface of the second lens faces the image end; and each of the first and second lenses is made from plastics, and has at least one aspheric surface. The miniature taking lens is in accordance with conditions that f1/EFL is more than 0.1 and less than 2 and that R1/R2 is more than 0.1 and less than 2, wherein f1 is the focal length of the first lens; EFL is the effective focal length of the miniature taking lens; and R1 and R2 are the curvature radiuses of the object end surface and image end surface of the first lens respectively. The miniature taking lens has a compact structure, is relatively lower in cost and easy to manufacture, satisfies the needs of massive production and can ensure relatively higher imaging quality.

The invention provides a camera lens, which comprises a silicone lens and an infrared filter membrane. The silicone lens comprises a first surface and a second surface arranged sequentially from an object side to an image side, and the infrared filter membrane is arranged on the first surface or the second surface. Since the infrared filter membrane is directly formed on the surface of the silicone lens, flat glass coated with the infrared filter membrane on the rear surface of the lens of the existing camera lens is eliminated, and further, the whole optical length of the camera lens is greatly reduced.