40 results about "Camera lens" patented technology

This invention provides an imaging lens system including, in order from an object side to an image side: a first lens with positive refractive power having a convex object-side surface; a second lens with negative refractive power; a third lens having a concave image-side surface; a fourth lens with positive refractive power; a fifth lens with negative refractive power having a concave image-side surface, at least one surface thereof having at least one inflection point; and an aperture stop disposed between an imaged object and the third lens. The on-axis spacing between the first lens and second lens is T12, the focal length of the imaging lens system is f, and they satisfy the relation: 0.5<(T12/f)×100<15.

LED lamp assembly particularly adapted for automotive applications that utilizes one or more standard replaceable LED bulbs with changeable optics to make multiple beam patterns. Preferably the optic is molded and easily replaced. An electric module is mounted directly under the LED to facilitate the electrical connection and provide good thermal contact. The LED light source(s) and interchangeable optic are positioned and sealed in the base of a main reflector or the vehicle hull by means well known to those skilled in the art.

A sliding-type portable communication apparatus includes a body housing; a sliding housing sliding on an upper surface of the body housing while being in contact with the body housing; first and second angled housings, each of the first angled housings extending from one corner of one side of the body housing in an inclined direction gradually going far from a lower surface of the sliding housing, each of the second angled housing having a first surface and a second surface, the first surface being in contact with the first angled housing while extending in the inclined direction, and the second surface being opposite to the first surface and in contact with the sliding housing; a pair of connecting arms, each of which extends from an end of one of the second angled housings in the inclined direction; and a rotatable lens housing disposed between the connecting arms and having a camera lens, the camera lens being oriented in a direction passing through the lower surface of the sliding housing when the sliding housing has not been moved a predetermined distance, and the camera lens being oriented in a direction passing through the upper surface of the body housing when the sliding housing has been moved.

An image stabilizer comprising a lens module (101) for holding a lens and an imaging element, an inner frame (11) for supporting the lens module (101) rotatably, and a driving means for rotating the lens module (101) with respect to the inner frame (11) wherein the driving means includes a bimorph (14). This image stabilizer enables to reduce the overall size and thickness of an imaging device.

This invention has as its object to eliminate sensitivity nonuniformity on the plane of an image sensing element irrespective of exchange of a lens. To achieve this object, in an image sensing apparatus which has an image sensing element and can exchange a lens, a memory stores shading correction coefficients respectively corresponding to pixels in a two-dimensional matrix on the plane of the image sensing element, and a correction device makes a correction calculation of pixel data read out from each pixel of the image sensing element by extracting the shading correction coefficient associated with the corresponding pixel from those stored in the memory.

An optical lens for lighting fixture includes a body, which comprises a bottom surface and a light-exit surface at opposing bottom and top sides thereof, an elongated groove formed in the bottom surface, a light incident surface, a first intersection line and a second intersection line respectively connected between the two ends of the elongated groove and the bottom surface, a first line segment and a second line segment respectively connected between the light incident surface and the bottom surface, a first virtual line defined between the two ends of the first line segment, a first distance that is the shortest distance between the two ends of the first intersection line, and a SAGi that is the shortest distance between any point at the first line segment and the first virtual line and satisfies the equation: 0≦|SAGi/first distance|×100≦2.8.

The invention provides a mixed-light-source liquid-crystal projection light engine system. The portable liquid-crystal projection light engine system is composed of a light source module, a polarized light management module, an image signal module and a projection lens, wherein the light source module consists of a high-brightness laser, an incoherent LED (Light-Emitting Diode) solid light source, a fluorescent device and the like. The output brightness of the projection system is greatly increased, the light source module is safe and environmentally friendly, and projected images have bright color and clear quality. The polarized light management module consists of a color-combining prism, a polarization beam splitter (PBS), a polarization color-combining device and the like, and different polarization states of three-primary-color mixed light are integrated into the same polarized light to be emitted to the image signal module. The image signal module is a monolithic reflection type liquid crystal light modulation device, and image signals are loaded to the three-primary-color polarized light in sequence according to the image signals corresponding to primary colors. The projection lens is used for projecting the light carrying the image signals onto a screen.

A lens module includes a lens, a barrel, a holder and a driving mechanism. The barrel is configured for receiving the lens. The holder is configured for receiving the barrel therein. The driving mechanism includes a first lever and a first piezoelectric device. The first lever includes a fixed end and a moving end and a connecting portion interconnected between the fixed end and the moving end. The fixed end of the first lever is pivotedly mounted in the holder. The moving end of the first lever is configured for driving the barrel to move. The first piezoelectric device is arranged between the connecting portion and the holder. The first piezoelectric device is extendable and contractible along an optical axis of the lens so as to control movement of the barrel along the optical axis relative to the holder.

The invention provides a photographic device. In the photographic device comprising a photographic optical system component with a prism, the prism is fixed firmly so that the photographic device is not upsized. The photographic device comprises: a buffering part elastically supporting and retaining a lens frame of the photographic optical system component with the prism relative to a frame part; a prism retaining frame comprising a prism receiving chamber receiving the prism and forming a part of the lens frame; and an adhesive injection hole with one end being open at the outer surface of the lens retaining frame and the other end being open in the prism receiving chamber. The opening of the other end side of the adhesive injection hole is flat in shape and the length direction of the opening is the direction vertical to the direction where the buffering effect of the buffering part on the lens frame is weakest. The prism is fixed through adhesive injected from the adhesive injection hole.

There is provided an apparatus for driving a piezoelectric actuator moving a lens for auto-focus, the apparatus including: a lens position sensing unit sensing a position of the lens and generating a sensed lens position value; a lens control unit comparing the sensed lens position value with a target lens position value for auto-focus to determine a moving direction of the lens; and an actuator driving unit generating an actuator driving signal for driving the piezoelectric actuator to move the lens in the moving direction determined by the lens control unit, wherein the lens control unit temporarily stops the operation of the actuator driving unit, and receives the sensed lens position value corresponding to the lens position sensed by the lens position sensing unit and compares the sensed lens position value with the target lens position value while the operation of the actuator driving unit is temporarily stopped.

The invention discloses a high-pixel mini-typed optical automatic focusing system driven to focus by electromagnetic force, comprising a base; the technical key point of the system is that the base comprises a drawtube used for guiding; the chamber of the drawtube is internally provided with a lens seat which can move upwards and downwards along the drawtube; the lens seat is enwound by a plurality of coil turns; the drawtube is internally provided with a magnet; the lens seat is provided with a recovery spring; the seat can also comprise a bearing seat and an upper cover; the drawtube is sleeved on the bearing seat; the upper cover presses the drawtube and is subsequently connected with the bearing seat; the magnet has four magnetic blocks which are uniformly arranged at four corners of the drawtube. The invention aims at overcoming the shortages that the existing focusing system has low precision, large appearance and restricted photographing distance and providing a system which adopts the electromagnetic force driving and spring elasticity balance type to realize the automatic focusing of the high-pixel lens; the system achieves the action accuracy of the automatic focusing of the lens and the micromation of the automatic focusing system and solves the microspur photographing problem of the lens.

The invention discloses an optical imaging lens. The optical imaging lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lensfrom an object side to an image side along the optical axis, wherein the first lens and the second lens respectively have positive focal power; the third lens, the fourth lens, the sixth lens and theseventh lens respectively have positive focal power or negative focal power; the fifth lens has negative focal power, and the surface of the fifth lens at the image side is a concave surface; the surface of the sixth lens at the object side is a convex surface; the adjacent lenses are spaced by air; the maximum angle of HFOV (half field of vision) of the optical imaging lens is smaller than 30 degrees.

The invention relates to the field of optical technology, and discloses an eyepiece with an expanded field angle, which comprises an eyepiece body. The front end surface of the eyepiece body is a first curved surface, the rear end surface of the eyepiece body is a second curved surface, and both the first curved surface and the second curved surface are rotary symmetrical surfaces. The center of the first curved surface is convex outwardly, the edge of the first curved surface is concave inwardly, and the second curved surface is convex outwardly. The eyepiece structure is used for virtual reality device display, the traditional dual-outward convex eyepiece structure is optimized, and on the premise of 2k resolution, in a specific space range, an optical lens with a distortion coefficient lower than 10%, color difference small, the field angle 120 DEG and magnification proper can be realized, and in a small eccentric range in a y direction, good imaging quality can be acquired.

An automatic tracking camera system includes: an image pickup unit; a driving unit for rotating the image pickup unit in panning or tilting direction; a signal receiver for receiving an object information signal; an image signal processor for recognizing an object in an image and detecting motion of the object in the image; a controller for controlling the image pickup unit, the driving unit, and the image signal processor; and a memory for storing, for each passageway, standby positions at which the image signal processor detects the object. The controller calculates an approaching passageway and angle of the object; selects a corresponding standby position from the standby positions stored in the memory; drives the driving unit and a lens apparatus to the standby position; and controls, when the image signal processor recognizes the object, the driving unit and the lens apparatus to automatically track the object based on detected information.

The invention discloses a license plate recognition camera with a rotation function. The license plate recognition camera comprises a camera body and a lens, the lens is fixed to one end of the camerabody, a shielding plate is fixedly connected to the top of the camera body, a solar electric board is fixed to the top of the shielding plate, a vertical rotary base is fixedly connected to the top of the camera body, and a horizontal rotary rod is fixedly connected to the top of the vertical rotary base. The vertical rotary base is arranged through the bottom of the camera body, the camera bodycan move vertically under the effect of a second screw to adjust the angle, a gear motor is connected to the horizontal rotary rod and the bottom of a turntable and runs to rotate the horizontal rotary rod through the turntable so that the whole camera body can horizontally rotate, the vision range of recognition and monitoring of the camera body is increased, the solar electric board is arrangedat the top of the shielding plate through a supporting frame and can accumulate a power source for the camera body, the external power supply amount is saved, the environment is protected, and the license plate recognition camera is suitable for wide application and popularization.

A lens module and a speaker module are provided. The lens module includes a lens stand, a base and a shape memory alloy. The shape memory alloy connects the lens stand and the base. The speaker module includes a speaker unit, a box and a shape memory alloy. The box has a rear wall and an opening. The shape memory alloy connects the speaker unit and the rear wall.

Curved lenses configured to decode three dimensional content and method of fabricating the same. The lenses comprise a polyvinylalcohol polarizer film laminated with triacetate on both sides, wherein the polarizer film has a polarizing efficiency equal to or exceeding 99% and a transmittance percentage equal to or exceeding 35% and a retarder film (e.g., norbornene copolymer resin) laminated on a front surface of the polyvinylalcohol polarizer film laminated with triacetate and aligned to produce a desired circular polarization responsive to specified retardation wavelengths.

A comparison apparatus and method for obtaining photographic effects is provided. The apparatus includes a digital display screen, and a digital memory containing multiple example images and diagrams to show how those example images were achieved. The images in the memory are classified by lighting type, color, camera, and lens. Images in the memory are displayed along with a list showing the settings used when the example images were acquired. The digital memory contains images obtained by a comprehensive study of light and color with varying attributes of the photographic process. The method includes the steps of choosing a digital memory for the type of lighting the photographer will use, whether ambient, artificial or both, inserting the memory into a digital display screen, displaying a number of example digital photographs from the memory, choosing the photograph from the memory that has the look selected by the user, and displaying a diagram and other relevant information of the setup for the photograph.

The invention relates to the technical field of camera lenses and discloses an optical imaging camera lens. The optical imaging camera lens comprises lenses from a first to a seventh sequentially along an optical axis from an object side to an image side, wherein the first lens is a convexoconcave lens with negative refractive power; the second lens has negative refractive power and a convex object side surface; the third lens has positive refractive power and a convex image side surface; the fourth lens is a convexoconcave lens with positive refractive power; the fifth lens has positive refractive power and a convex image side surface; the sixth lens has negative refractive power and a convex object side surface; the seventh lens has positive refractive power and a convex image side surface; and the object side surface and the image side surface of the seventh lens are both aspherical surfaces. The optical imaging camera lens has the advantages of large main incident angle, good optical imaging quality, small volume and light weight.

An optometric apparatus comprises: a pair of right and left lens chamber units, each unit including a test window and optical elements to be selectively disposed in the test window; a convergence unit which converges the right and left lens chamber units; an input unit with which a pupillary distance of an examinee is inputted; a calculation unit which determines a convergence angle of the right and left lens chamber units based on a distance for a near vision examination at which a near vision optotype is presented and the inputted pupillary distance, the convergence angle for the inputted pupillary distance longer than a predetermined reference distance being determined such that an optical axis of the optical element is substantially aligned with a visual axis of an examinee's eye, whereas the convergence angle for the inputted papillary distance shorter than the reference distance being determined such that the right and left lens chamber units are converged without coming into contact with each other; and a control unit which controls driving of the convergence unit based on the determined convergence angle.

The invention discloses a device for detecting the surface imperfection of a curved-surface optical element. The device comprises a lighting system and an imaging system and is characterized in that light sources are arranged in the lighting system, the imaging system comprises an imaging lens, an imaging device and a processor in signal connection with the imaging device, the light sources are arranged outside the imaging lens, and the imaging device at least comprises a coaxial imaging mechanism or a lateral imaging mechanism. The device has the advantages that on the basis of the light scattering principle, the light source evenly irradiates the surface of the curved-surface optical element, the imaging system above the curved-surface optical element detects the imaging of the curved-surface optical element, the curved-surface optical elements of different curvature radiuses can be detected, the difficulty that the surface imperfection of the curved-surface optical element cannot beautomatically detected is solved, and the device is low in cost and simple in structure.

The invention relates to an automatic scanner and belongs to the technical field of identity identification devices. The automatic scanner comprises a scanner body, a feeding device, a scanning lens, a driving motor, a collecting device, a switch control device, a control display screen and a position control electric eye, wherein the feeding device, the scanning lens, the driving motor, the collecting device, the switch control device, the control display screen and the position control electric eye are all arranged on the scanner body; the switch control device comprises an emergency stop switch and a staring switch; the driving motor controls the operation of the feeding device and the collecting device. The automatic scanner has the advantages of automatically reading two-dimensional bar codes, being low in cost and high in efficiency and the like.

The invention discloses a device for on-line ultrasonic dressing of a coarse-grained superhard abrasive grinding wheel. Within the time of suspending of grinding machining of the grinding wheel, a detecting device utilizes an angle control encoder to control an industrial camera used for extracting images to rotate, a camera lens scans and takes pictures from the end away from the grinding wheel to the position, perpendicularly close to the grinding wheel, of the camera, then the images are uploaded to a computer and processed through an openCV, and if it is detected that grinding wheel abrasive particles are not subjected to large-area abrasion, the detecting device rotates the camera to get away from the grinding wheel; and if it is detected that the grinding wheel abrasive particles areseriously abraded, machining is suspended continuously, the industrial camera rotates to get away from the grinding wheel, a dressing device moves to the position of the grinding wheel, the coordinates of the contour of abrasive particle abrasion accumulating areas are output, a G code is generated, a tool on an ultrasonic device is controlled to dress on the abraded position, and after dressingis completed, the ultrasonic device moves to the outmost side of a worktable. According to the device, the ultrasonic device is utilized to detect and dress the grinding wheel under the situation of not detaching the grinding wheel, and the machining quality and efficiency of the grinding wheel are improved.

The invention discloses an intelligent mathematics and applied mathematics problem analysis showing stand, and relates to the technical field of teaching tools. The top end of a rotating shaft is connected with the center of an inverted T-shaped bracket in a rotatable manner; the inverted T-shaped bracket comprises three supporting rods; a blackboard I and a blackboard II are vertically and symmetrically arranged at the front and rear parts of each supporting rod, and are connected through a bearing connection piece; the bearing connection pieces rotate along a plane perpendicular to the extending directions of the supporting rods and slide along the extending directions of the supporting rods; an L-shaped telescopic supporting rod is arranged at the top end of a telescopic rod; a camera is arranged at the end part, which is far away from the supporting rods, of the L-shaped telescopic supporting rod; a lens of the camera is opposite to one of the blackboards; the camera transmits an image into a projector in a classroom in real time, and the real-time image is projected onto a projection screen through the projector. The intelligent mathematics and applied mathematics problem analysis showing stand is convenient to use and simple in structure; meanwhile, in combination with a projection system, students in the whole classroom can see clearly what a teacher teaches.

A lens system comprises a first electro-active lens comprising a first focus sensor coupled to a first processor and a second electro-active lens comprising a second focus sensor coupled to a second processor. The first focus sensor periodically generates electromagnetic signals and detects electectromagnetic signals generated by the second focus sensor. The second focus sensor periodically generates electromagnetic signals and detects electectromagnetic signals generated by the second focus sensor. The first processor receives an indication of the second electromagnetic signals and, based on the received indication of the second electromagnetic signals, determines a relative convergence angle between the first and second electro-active lenses. Based on the determined relative convergence angle, the first processor determines a focal setting for the first electro-active lens and controls an electroactive element in the first electro-active lens, based on the determined focal setting.

Disclosed is a projection type image display apparatus including a projection section to output a projection light in which an image is attached through a projector lens and a photographing section to photograph a projected image projected by the projection section through a photographing lens, and the projected image which is projected on a screen by the projection section is obtained by the photographing section and a focus of the projected image is adjusted based on a photographing result of the image obtained by the photographing section, and the projector lens and the photographing lens are movable in a direction to change the focus of the projected image or a focus of the photographed image by a same drive section.

The invention discloses a projector, which comprises a spatial light modulation device and a lens. The optical center of the lens does not directly face the geometrical center of the spatial light modulation device, so that the image projected by the projector shifts, and the projector can be placed at the place not influencing the sight of people and without adopting an upward projection or downward projection mode, and can realize vertical screen projection; and the image can be fully projected on a screen, thereby preventing the problems of inaccurate focusing and trapezoid deformation due to adoption of the upward projection or downward projection mode in the common projection, and improving definition of the projector.