146results about How to "Change focal length" patented technology

A multifocal lens system to be used for digital cameras for setting any one of a plurality of lenses in a picture taking (image capturing) position comprising a wide-angle lens (shorter focal length lens) mounted in front of an image sensor in a picture taking (image capturing) position, a telephoto lens (longer focal length lens) mounted alongside the wide-angle lens, a parallelogram prism (rhombic prism) or a pair of triangular prisms removably arranged between the two lenses at the rear of them. When the wide-angle lens is to be used, the parallelogram prism or one of the two triangular prisms is to be removed from the rear of wide-angle lens so that the wide-angle lens can be focused on the sensor enabling light to pass therethrough. The telephoto lens is so positioned that it may be focused on the image sensor through the parallelogram prism or being reflected by the triangular prisms enabling light to pass therethrough when a part of the parallelogram prism or one of the two triangular prisms is placed in front of the image sensor to cover the imaging area of the sensor and to shut the light through the wide-angle lens to the sensor. By moving the prism from the rear of each lens, one of the two lenses can be positioned for picture taking (image capturing).

An information processing device includes a shooting lens assembly, a photoelectric conversion element, a memory, a display screen, a zoom designation device and an image size changing device (e.g., a controller). The photoelectric conversion element receives light from an object that is collected by the shooting lens assembly and converts the collected light into electrical signals representative of the object. The memory stores image data that is representative of objects. The display screen displays images of the object corresponding to the electrical signal converted by the photoelectric conversion element or images corresponding to the image data stored in the memory. The image size changing device magnifies or reduces an image size of the image displayed on the display screen regardless of whether the image is being supplied from the photoelectric conversion element or the memory.

The invention relates to an intelligent unmanned aerial vehicle for wild animal research. The intelligent unmanned aerial vehicle comprises a body and a photographing mechanism. The photographing mechanism is arranged under the body and comprises a second driving motor, a second driving shaft, a turntable, a stretching unit and a photographing unit, the photographing unit comprises a fixing plate, a camera body, a lens and a focusing mechanism, the camera body is arranged on one side of the fixing plate, the lens and the focusing mechanism are arranged on the other side of the fixing plate, and the focusing mechanism comprises a third driving motor, a second connecting rod, a third connecting rod, a hinge block, a slide bar and a rotary ring. The intelligent unmanned aerial vehicle for wild animal research has the advantages that the second driving motor and the stretching unit can run, accordingly, angles of the lens can be adjusted, the intelligent unmanned aerial vehicle can bring convenience for adjusting photographing angles according to research requirements, and wild animals in different ranges can be photographed; the focal length of the lens can be changed by the aid of the focusing mechanism on the fixing plate, accordingly, moving objects at different distances can be clearly photographed, the intelligent unmanned aerial vehicle can bring convenience for acquiring images of the animals which move at high speeds for research, and the practicality of equipment can be improved.

The invention provides an anti-shake structure, an anti-shake system and a camera device with the anti-shake system. The anti-shake structure comprises a SMA thread, an OIS reed fixedly connected withthe SMA thread; an OIS substrate; a sheeting module partially arranged on the OIS substrate and electrically connected with the SMA thread, thereby enabling the SMA thread to shrink or expand under the current effect and drive at least a part of the OIS reed to move along a predetermined direction, wherein the sheeting module is provided with an input terminal and an output terminal which are located at one side of the sheeting module; an OIS support arranged on the OIS substrate and used for supporting the OIS reed; and an OIS base arranged at one side, far away from the OIS support, of theOIS substrate and connected with the OIS substrate. Through the technical scheme provided by the application, the problem that the blurred photo is photographed due to hand shaking in the photographing process can be solved.

The invention relates to video devices, monitoring devices and pick-up lens devices, in particular to a four-element high-resolution day-and-night dual-purpose multipoint varifocal lens. The multipoint varifocal lens in a novel four-element structural style has the advantages of high optical zoom ratio, large focal length, large aperture, high resolution, wide light spectrum, confocal property and the like; and the multipoint varifocal lens also has the characteristic of small structural length. The light path is composed of a front fixing element (A), an optical zooming element (B), a back fixing element (D) and a compensation element (E). Since the optical zooming element (B) and the compensation element (E) correspondingly move back and forth along the optical axis, the focal length of the optical system can be conveniently changed. In the light path design process, the focal power of the four elements are reasonably distributed, so that the optical lens has the performance indexes of high optical zoom ratio, large focal length and large relative aperture.

The invention provides a wearable head up optical system which comprises an imaging system, output imaging light rays and a light guide system which guides the imaging light rays into human eyes. The imaging system is provided with a light source interface, the imaging system receives light source rays emitted by an outside light source through the light source interface and light ray transmission media, and the light source rays are used for generating imaging light rays. The wearable head up optical system is beneficial to decreasing the size and lowering the weight of the system and capable of improving the comfort degree in the wearing process.

A lighting system includes a bright bulb installed in front of a variable reflector assembly comprising a plurality of leaves. The leaves have some overlap and are pivotally attached near the base of the bulb, so that they can be collapsed inward or expanded outward in tandem by a mechanism. A baffle and light shield enclose and protect the bulb, and result in controllable and variable indirect lighting from the bulb.

The invention relates to a zooming lens module, which comprises a lens barrel as well as a piezoelectric actuating device, a first lens module and a second lens module contained inside the lens barrel, wherein, the piezoelectric actuating device and the second lens module are fixed on the lens barren in turn; the piezoelectric actuating device comprises a piezoelectric ceramic piece and a slide piece matched with the piezoelectric ceramic piece; the first lens module is fixed on the slide piece; the piezoelectric ceramic piece is used to drive the slide piece to move along an optical axis under the action of voltage, thereby driving the first lens module to move along the optical axis relative to the second lens module. With a simple structure, the invention can effectively reduce the volume of the zooming lens module and lowers manufacturing cost.

The invention discloses a liquid continuous zooming lens which comprises a precession device, an upper cover plate and a lower cover plate, wherein the upper cover plate is positioned on the upper surface of the precession device, the lower cover plate is positioned on the lower surface of the precession device, and both the upper cover plate and the lower cover plate are made of transparent materials; and the precession device is formed by connecting an upper inner sleeve with a lower outer sleeve, an inner hole of the outer sleeve is a stepped hole with a large upper part and a small lower part, a transparent elastic film is arranged on the step of the stepped hole, a seal pressing ring is installed on the inner side of the lower part of the outer sleeve, the transparent elastic film is tightly pressed on the outer sleeve by the seal pressing ring, a cavity is formed by the transparent elastic film, the outer sleeve and the lower cover plate, and liquid is filled in the cavity. The liquid continuous zooming lens has the advantages of simple structure, small size, light weight, stabilization of an optical axis, continuity in zooming, high response speed, high precision, convenience in operation and easiness in processing.

The embodiments of the invention provide a zoom lens, a zoom method, a terminal and a computer readable storage medium. The zoom lens includes n lenses; the n lenses are successively arranged in an optical axis direction; n is a positive integer greater than or equal to 2; an aperture is arranged parallel to the n lenses in an optical axis direction; the aperture is arranged at the tail end of theoptical axis and parallel to the n lenses to form an image plane; the n lenses include m variable curvature lenses and n-m aspherical lenses; the top end and bottom end of each variable curvature lens of the m variable curvature lenses are provided with driving parts; m is a positive integer greater than 1 and less than n; by changing the power of the driving parts corresponding to the m variablecurvature lenses, the radiuses of curvature of the m variable curvature lenses are changed, and an incident angle is obtained; and after receiving incident light corresponding to an object space, under the action of a beam of light of the aperture, and through the n lenses, the incident light is reflected to the image plane to be an image at an incident angle.

The invention relates to the technical field of optics and the field of MEMS, in particular to an all-solid-state variable-focus piezoelectric driving type micro lens based on an SEBS film, which is structurally characterized in that the SEBS film is placed between two glass layers with different thicknesses; and the two annular piezoelectric actuators are respectively bonded on the upper bottom surface and the lower bottom surface of the glass film. When a voltage is applied to the piezoelectric actuator, the piezoelectric actuator forces the glass film to bend, so that a lens structure is integrally formed, and the glass film has different bending curvatures due to different voltages, so that the focal length of the micro lens is changed. The piezoelectric drive type micro lens is a typical micron-sized MEMS integrated product, and has the advantages of small size, low power consumption, no magnetic interference, wide zoom range, quick response and the like.

The invention relates to a self-adaptive closed loop adjustment laser range finding method and device and belongs to the field of laser range finding. A liquid lens is used for replacing a common lens in a measurement system, liquid is used as a medium in the liquid lens, curvatures of two curved surfaces of the liquid lens can be changed via impressed voltage, a focal length of the liquid lens can be further changed, relative positions of light spots and a detector photosensitive surface are observed via use of an infrared camera, and therefore an aim of self-adaptive closed loop adjustment laser range finding can be attained; according to the self-adaptive closed loop adjustment laser range finding method and device, a self-adaptive closed loop can be used for controlling the liquid lens, curvature radiuses of the two curved surfaces of the liquid lens can be changed, the focal length of the liquid lens is therefore changed, and echo light spots are enabled to defocus; the method and device can help prevent problems of large energy design of the echo light spots, easy saturation of the detector and lowered precision during short quarter range finding operation. A range finding scope can therefore enlarged, and measurement precision can be improved.

The invention discloses a compact type focal length switchable zooming lens, comprising a first fixed optical lens, an optical lens switching panel, a switchable optical lens group arranged on a switchable panel of the optical lens switching panel, wherein the switchable optical lens group comprises a plurality of switching lenses having various curvatures and/or made of various materials; all switching lenses are arranged in the same plane; the optical axis of each switching lens is aligned with the optical axis of the first fixed optical lens under the driving of the optical lens switching panel. In the invention, the lens can choose to switch the needed lens in the optical lens group according to the needs, and the focal length of the integral lens is changed so as to achieves the focal-length changing capability.

An active matrix focusing lens and focusing glasses having the same are provided. The active matrix focusing lens comprises a lens body and a transparent phase modulator which includes a first substrate, a second substrate, a plurality of data electrode lines and scan electrode lines which are disposed on the first substrate and spaced apart from each other, a plurality of photoelectric switches disposed on the first substrate and electrically connected to the data electrode lines and the scan electrode lines, and a liquid crystal layer disposed between the first substrate and the second substrate. Any two adjacent data electrode lines and the scan electrode lines collectively define a pixel region. When a voltage is applied to the photoelectric switches, the corresponding pixel regions have different refractive indices, and the focal length of the active matrix focusing lens is changed, so that the same pair of lenses can be switched to look far or near, without preparing multiple glasses to cope with looking far or near. It is also possible to adjust different focal lengths for respective pixel regions so that different positions of the entire lens can have different focal lengths at the same time.