195 results about "Fixed-focus lens" patented technology

A low-light viewing device includes a housing, having mounted thereto: a lens, an electronic camera for receiving light focused by the lens and for providing an output signal; a display for receiving the output signal and displaying an image detected by the camera; a controller for controlling the camera and the display, and a user interface for operating the controller. The lens may be a fixed focus lens having an F number of less than about 1, and a T number of less than about 1.5. The display may have a resolution at least as great as the resolution of the camera. The device may have a processor programmed to provide control signals to the camera and display depending on a selected light environment.

A low-light viewing device includes a housing, having mounted thereto: a lens, an electronic camera for receiving light focused by the lens and for providing an output signal; a display for receiving the output signal and displaying an image detected by the camera; a controller for controlling the camera and the display, and a user interface for operating the controller. The lens may be a fixed focus lens having an F number of less than about 1, and a T number of less than about 1.5. The display may have a resolution at least as great as the resolution of the camera. The device may have a processor programmed to provide control signals to the camera and display depending on a selected light environment.

The invention discloses a shooting method. The method is applied to a shooting terminal, and the shooting terminal comprises a first camera, a second camera and a third camera, wherein the first camera and the third camera are color cameras, the second camera is a monochrome camera, the resolution of the second camera is greater than the resolution of the first camera and the third camera, and thefirst camera, the second camera and the third camera are all prime lenses; and the equivalent focal length of the third camera is greater than the equivalent focal length of the first camera and thesecond camera; and the method includes the following steps: acquiring a target zoom ratio; determining a target lens from the first camera, the second camera and the third camera according to the target zoom ratio; acquiring an image including a target scene by using the target lens; and obtaining an output image of the target scene according to the image including the target scene, wherein the target scene is a scene that a user expects to shoot. According to the scheme of the invention, an approximately 5x lossless zoom effect can be achieved.

The invention discloses a general video flexibility measurement system insensitive to ambient light. The general video flexibility measurement system comprises a black-and-white industrial camera (1), an industrial fixed-focus lens (2), an electronic theodolite (3), a distance measurement machine (4), a tripod (4), a high brightness monochromatic LED target (6), a narrow bandpass filter sheet (7) corresponding to monochromatic light source wavelength and a computer (8); a monochromatic LED target is installed on a tested point; a video flexometer with the narrow bandpass filter sheet installed on the lens is utilized to record the video image of the LED target in real time; and flexible data is obtained in real time through an image tracking algorithm on the basis of image gray correlation matching or characteristic points extraction. The general video flexibility measurement system is insensitive to the change of ambient light, can realize high precision measurement for displacement or flexibility at daytime or nigh, can calculate multiple object positions in one image, and realizes real-time dynamic measurement of displacement or flexibility of multiple detected points.

In the image taking method where images of an object are taken by a running image taking portion provided with a zoom lens, and at least one image taking portion for measuring a distance provided with a fixed focus lens equal to the wide-angle-side end of the zoom lens to generate image data, an image taking method includes the steps of simultaneously taking an image by each image taking system and detecting and storing a zoom position at an arbitrary angle of view of the zoom lens. A search space in a photographing field in the stored zoom position is set. When it is determined that no corresponding point is on one of the end faces of the set space, a running image is taken after the zoom lens is moved to the stored zoom position by the zoom lens drive means.

A fixed-focus lens module includes an outer lens barrel, an inner lens, a first lens, and a second lens group. The outer lens barrel includes a first open end, a first cavity, and a second open end arranged in the order from the object side to the image side of the outer lens barrel. The inner lens barrel is received in the outer lens barrel adjacent to the first open end. The first lens is received in the inner lens barrel. The second lens group is received in the outer lens barrel adjacent to the second open end. An gap is defined between an outer wall of the inner lens barrel and an inner wall of the outer lens barrel at the first open end, and the center axis of the inner lens barrel is adjustable relative to the outer lens barrel for adjusting the alignment between the first lens and the second lens group.

The invention discloses a fixed-focus lens which comprises an aperture stop, a first positive lens, a second negative lens, a third meniscus positive lens and a fourth negative lens; wherein, the aperture stop, the first positive lens, the second negative lens, the third meniscus positive lens and the fourth negative lens are arranged on an optical axis from an objective end to an imaging end in sequence. The fixed-focus lens satisfies the requirements as follows: RS32 / f is more than 0.1 and less than 0.3, wherein, the f is the effective focal length of the fixed-point lens, and the RS32 is the curvature radius of the surface of the third meniscus positive lens near the imaging end. The fixed-focus lens of the invention limits the effective focal length to avoid the overlength of the total length of the system through setting the proper effective focal length, and thereby the favorable picture quality and the adequate imaging height are provided.

The present invention relates to the lens display technology field, in particular to an optical fixed-focus lens used for realizing a large image surface and a large aperture of the optical fixed-focus lens. The optical fixed-focus lens comprises, orderly from an object side to an image side, a first lens group, a second lens group, a diaphragm and a third lens group, wherein the focal power of the first lens group is negative, the focal power of the second lens group is positive, the focal power of the third lens group is positive, and the diaphragm is located between the second lens group and the third lens group; the first lens group comprises a biconvex first lens of which the focal power is positive, a biconcave second lens of which the focal power is negative, a biconcave third lens of which the focal power is negative and a biconvex fourth lens of which the focal power is positive. Therefore, the high definition imaging demand can be realized, the image surface and the view field of the optical fixed-focus lens are expanded, and the resolution of the optical fixed-focus lens is improved.

In the image taking method where images of an object are taken by a running image taking portion provided with a zoom lens, and at least one image taking portion for measuring a distance provided with a fixed focus lens equal to the wide-angle-side end of the zoom lens to generate image data, an image taking method includes the steps of simultaneously taking an image by each image taking system and detecting and storing a zoom position at an arbitrary angle of view of the zoom lens. A search space in a photographing field in the stored zoom position is set. When it is determined that no corresponding point is on one of the end faces of the set space, a running image is taken after the zoom lens is moved to the stored zoom position by the zoom lens drive means.

The invention provides a fixed focus lens, comprising a first lens group, a second lens group and a third lens group which are sequentially arranged from the object side to the image side; the first lens group is provided with negative dioptre and comprises three lenses which are arranged from the object side to the image side; the lens of the first lens group closest to the object side is a non-spherical lens; the second lens group is provided with positive dioptre and comprises two lenses which are arranged from the object side to the image side; the third lens group is provided with positive dioptre and comprises six lenses which are arranged from the object side to the image side; furthermore, the dioptre of the lenses of the third lens group is sequentially negative, positive, negative, positive, positive and positive from the object side to the image side; the fixed focus lens meets the conditions as follows: (i) the absolute value of F1 / F is less than 3 and more than 0.2; (ii) F2 / F is less than 3 and more than 0.5; (iii) F3 / F is less than 3.5 and more than 0.5, wherein, F, F1, F2 and F3 are respectively the effective focus length of the fixed focus lens, the first lens group, the second lens group and the third lens group.

An accommodative hydraulic intraocular lens system (AHIOL) has a cylindrical actuator contained within which is a hydraulic lens assembly. The hydraulic lens assembly has a transparent elastically reconfigurable membrane coupled to a fixed focus lens by a bellows and a refractive hydraulic fluid contained in the space defined by the membrane, the bellows and the lens, and is maintained at the upper range of its diopter power by the elastic properties of the bellows, springs, or both.

An imaging device includes a fixed focused lens, an image sensor having a image matrix of a plurality of pixels arranged on a semiconductor substrate and supplying image data, and electronic means for reading the image matrix. The image sensor also comprises at least two ambient light sensors arranged on the semiconductor substrate on opposite sides of the image matrix, and configured to capture an ambient light intensity through the fixed lens, and the electronic means is also configured to read the two ambient light sensors and to supply ambient light data and the image data.

A fixed-focus lens capable of imaging a light valve disposed at a reduced side onto a magnified side is provided. The fixed-focus lens includes a first lens group, a second lens group, and a free form reflective mirror. The first lens group is disposed in the light path between the reduced side and the magnified side. The second lens group is disposed in the light path between the first lens group and the magnified side and includes a first free form lens. The free form reflective mirror is disposed in the light path between the second lens group and the magnified side. An imaging surface imaged from the light valve by the fixed-focus lens is a curved surface. An imaging system using the fixed-focus lens is also provided.

An optical image capturing module is provided, including a circuit assembly and a lens assembly. The circuit assembly may include a circuit substrate, a plurality of image sensor elements, a plurality of signal transmission elements, and a multi-lens frame. The image sensor elements may be connected to the circuit substrate. The signal transmission elements may be electrically connected between the circuit substrate and the image sensor elements. The multi-lens frame may be manufactured integrally and covered on the circuit substrate and the image sensor elements. A part of the signal transmission elements may be embedded in the multi-lens frame, whereas the other part may be surrounded by the multi-lens frame. The lens assembly may include a lens base, a fixed-focus lens assembly, an auto-focus lens assembly, and a driving assembly. The lens base may be fixed to a multi-lens frame.

The invention provides an iris alignment and acquisition device which comprises a plano-convex mirror, a light source and an iris acquisition part, wherein the plano-convex mirror and the iris acquisition part are located on the same central axis; the light source is arranged at the periphery of the plano-convex mirror; and light rays are converged to an iris acquisition position. According to the iris alignment and acquisition device, the plano-convex mirror is introduced for iris alignment, and prime lenses are adopted for iris acquisition, so that the iris alignment and acquisition device is low in cost, simple in structure, small, exquisite and light.

The invention discloses a camera module and an electronic device. The camera module comprises an image sensor and a prime lens. The prime lens and the image sensor are correspondingly arranged; the prime lens comprises a first lens group and a second lens group which are arranged at intervals along the optical axis of the prime lens and can move relatively along the optical axis. The first lens group and the second lens group can move along the optical axis towards the side far away from the image sensor so that the prime lens is enabled to move from the first position to the second position.When the prime lens is located at the first position, the camera module focuses outside the image sensor, and when the prime lens is located at the second position, the camera module focuses on the image sensor. Thus, the camera module can be packaged into electronic devices such as a mobile phone with a short total length when the camera module is located at the first position, the thickness of the electronic devices such as the mobile phone cannot be increased, and lightening and thinning of the electronic devices are facilitated.

An exemplary imaging module includes a substrate, an image sensor, a lens barrel, a lens, and a holder. The image sensor is fixed on the substrate, the lens barrel is connected to the substrate to enclose the image sensor, the lens is received in the lens barrel, and the holder is connected to the lens barrel and partially receives the lens barrel therein. The lens barrel includes an elastic protruding portion protruding from the inner surface thereof. The inner surface of the protruding portion elastically abuts a side surface of the lens.

The invention discloses a 3D stereo display technical scheme which is suitable for watching with naked eyes and can truly reappear an objective scene. Based on the technical scheme, dynamic focusing projection is carried out on pixels of a plane image through dynamic focusing light mixed lens matrix to form a light mixed real image, a formed image distance is equal to or is in direct proportion to an image distance of an image live scene, formed relative to a prefocus lens, all pixel real image distances are different and commonly form a stereo real image, the stereo real image is observed in an amplification way through a convex lens or is projected onto an imaging lens again to form an image to realize 3D stereo display technology and equipment for real scene reduction.

The invention discloses a pair of speckle data gloves based on DSP-PC machine visual system, comprising adopting two CCD cameras to perform real-time image acquisition to gloves worn by user, wherein each camera is equipped with a fixed-focus lens satisfying capture range, tracking capture function of hand movement can be realized by treating the data through DSP and PC machine so as to measure hand posture; furthermore, an embedded real-time image acquisition treating unit is arranged to digitalize the image signal acquired by the CCD camera, a video treatment chip DM 642 is used for detecting, identifying and tracking the gloves speckle; a virtual hand presentation and interaction unit based on PC machine comprises a parametrically adjustable virtual hand module for modifying size of the module according to the measurement result of the physiological parameter of current user hand, and obtaining the information from the image acquisition treating unit to compute the position of the hand and the bending angle of the fingers so as to drive the virtual hand to move to perform movement presentation and man-machine interaction in virtual environment. The invention is low in cost and capable of popularizing in greater user group, which is a new tool for improving more natural and harmonious man-machine interaction way.

The invention relates to a two-liquid zoom lens optical imaging system for simulating zoom of a human eye, wherein the upper and the lower ends of a cylindrical tube are respectively and airtightly connected with an upper cover and a lower cover of a two-liquid zoom lens; a fixed focus lens is airtightly embedded into the central position of the upper cover of the two-liquid zoom lens; two small holes are symmetrically arranged outside the fixed focus lens; the central position of the lower cover of the two-liquid zoom lens is airtightly connected with a flat glass sheet; the inner wall and the lower end face of the cylindrical tube as well as the outer wall of cylindrical tube, contacting with the lower cover of the two-liquid zoom lens, are coated with a hydrophobic dielectric layer; water-based conductive liquid and oiliness insulating liquid are placed in a cylindrical container; and an electrode is respectively led out from the outer wall of the cylindrical tube and the lower cover of the two-liquid zoom lens, which is in contact with the conductive liquid, external voltage is applied between the two electrodes and the liquid interface curvature radius of the two-liquid lens is changed through adjusting an external electric field so as to drive the zoom of a lens system. The two-liquid zoom lens optical imaging system provided by the invention has the advantages of small structure, convenience for implementation and fast response speed; and the conformity of the zoom ranges of the system and the human eye can be realized.

The present invention provides a super star-light-level high-resolution fixed focus lens which comprises a first lens with convex-concave negative focal power, a second lens with biconcave negative focal power, a third lens with concave-convex positive focal power, a fourth lens with biconvex positive focal power, a fifth lens with convex-concave positive focal power, a sixth lens with convex-concave negative focal power, a seventh lens with biconcave negative focal power, an eighth lens with biconvex positive focal power, a ninth lens with biconvex positive focal power, a tenth lens with convex-concave negative focal power and an eleventh lens with biconvex positive focal power which are orderly arranged from an object side to an image side along an optical axis. 11 specially arranged lenses are adopted, the super star-light-level high-resolution fixed focus lens has a characteristic of ultra large amount of light pass, a wide angle 110 degrees of the field of view angle is supported,and at the same time, the requirements of resolution and imaging can be ensured when the lens is used in an environment of -40 DEG C to 70 DEG C.

The present invention relates to a camera lens. The camera lens comprises an independent first lens unit and at least one independent second lens unit fixedly connected with the first lens unit, the first lens unit and the second lens unit are sequentially arranged, and the first lens unit or the second lens unit is provided with a variable-focal length lens. According to the camera lens, the variable-focal length lens is adopted, the close-range imaging of the camera lens is achieved, additional lenses or redundant components are not required, hardware costs can be saved, and the quantity ofhardware can be decreased; the lens achieves fast and convenient focal length variation; the design requirements of the camera lens are lowered, and the imaging of the image pick-up module set is moreclear; the lens is adopted, so that the continuous focal length variation of the image pick-up module set can be realized, and the imaging quality of the image pick-up module set is good; and the useof the lens is equivalent to the replacement of a corresponding fixed-focus lens in the camera lens, so that the increase of the number of lenses in the camera lens can be avoided, and therefore, theincrease of the overall height or size of the camera lens can be avoided.

Aspects of the present invention provide dynamic focusing systems and dynamic zoom systems having no moving parts. The dynamic focusing systems can include an electro-active lens, a fixed focus lens in optical communication with the electro-active lens and a focal plane. The dynamic zoom systems can include a first electro-active lens, a second electro-active lens, a fixed focus lens, and a focal plane. The electro-active lenses of the present invention can have an adjustable optical power to provide variable focusing capability. The dynamic focusing systems and dynamic zoom systems can include a controller for altering the adjustable optical powers of the electro-active lenses. The dynamic focusing systems can focus on objects at various distances based on the controlled optical power of the included electro-active lenses. The dynamic zoom systems can provide magnification and de-magnification based on the controlled optical power of the included electro-active lenses.

The invention provides an infrared fixed-focus lens of which component lens pieces are made of germanium featured by low chromatic dispersion, and have no surface processed to serve as diffraction optics. The infrared fixed-focus lens comprises the first lens piece disposed closer to an object and of negative refractivity, and the second lens piece disposed closer to the image plane and of positive refractivity. Both the first and second lens pieces are made of germanium.

The present invention relates to the lens technology field, especially to a wide-angle oversized aperture high-definition fixed focal lens. The lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens. The relations of each focal length are as follows: 1.5<|f3 / f|<5; 1.6<|f4 / f|<5.2; 0.9<|f5 / f|<3; 1.9<|f6 / f|<5.9; 1.5<|f2 / f|<6.5; 2.2<|f7 / f|<8.3; 4.3<|f8 / f|<13.2; 2.3<|f9 / f|<8.7. The wide-angle oversized aperture high-definition fixed focal lens can reach the large aperture of F0.95, the image surface with maximum value of 1 / 2.5', the field angle of more than 120 degrees, the resolution of six million pixels and the optical total length of less than 32mm; and moreover, the size is small and the production cost is low.

The invention discloses a prime lens and imaging equipment, and the prime lens comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object side to an imaging surface along an optical axis; the first lens has negative 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 convex surface, and the image side surface of the second lens is a concave surface; the third lens has positive focal power, the object side surface of the third lens near the optical axis is a convex surface and has an inflection point, and the image side surface of the third lens is a convex surface ; the fourth lens has positive focal power, the object side surface and the image side surface of the fourth lens are convex surfaces; the fifth lens has negative focal power, the object side surface of the fifth lens near the optical axis is a convex surface, and the image side surface of the fifth lens is a concave surface; the sixth lens has positive focal power, and the object side surface and the image side surface of the sixth lens are convex surfaces; and the seventh lens has negative focal power, the object side surface of the seventh lens is a convex surface near the optical axis, the image side surface of the seventh lens is a concave surface near the optical axis, and the object side surface and the image side surface of the seventh lens have inflection points. The prime lens has the advantages of ultra-large wide angle, miniaturization, good thermal stability and the like.

The invention relates to an f6mm all-pass day and night full-color high-definition fixed-focus lens, which is characterized in that in an optical system of the lens, a front lens group A with the negative focal power, a diaphragm and a back lens group B with the positive focal power are sequentially arranged in the incidence direction of light rays from the front side to the back side; the front lens group A comprises a biconcave lens A-1, a negative crescent lens A-2 and a biconvex lens A-3 in sequential arrangement front the front side to the back side; the back lens group B comprises a biconvex lens B-1, a biconcave lens B-2, a biconvex lens B-3 and a gluing group in sequential arrangement from the front side to the back side; the gluing group is sealed, connected and bonded with a biconvex lens B-4 and a negative crescent lens B-5. The lens provided by the invention can still be used normally in high-low-temperature environment; the resolution is high; the high-quality color imaging can be realized in low-illumination and night environment; the total length of the light path is short; the structure is compact; the light passing caliber is in the full light passing state; the light inlet quantity is sufficient; the matching with high-resolution CCD (charge coupled device) or CMOS (complementary metal-oxide-semiconductor transistor) being 3-million pixels or higher can be realized.

An optical image capturing module is provided, including a circuit assembly and a lens assembly. The circuit assembly may include a circuit substrate, a plurality of image sensor elements, a plurality of signal transmission elements, and a multi-lens frame. The image sensor elements may be connected to the circuit substrate. The signal transmission elements may be electrically connected between the circuit substrate and the image sensor elements. The multi-lens frame may be manufactured integrally and be covered on the circuit substrate and the image sensing elements. The signal transmission elements may be embedded in the multi-lens frame. The lens assembly may include a lens base and a fixed-focus lens assembly. The lens base may be fixed to a multi-lens frame. The fixed-focus lens assembly may have at least two lenses with refractive power.