30results about How to "Improve light path" patented technology

The present invention discloses a three-dimensional coordinate measurement method based on line structure light scanning. The method comprises the steps of (S1) a line laser emits laser, and a laser line is formed on a measured object, (S2) the image information corresponding to the laser line formed on the measured object, (S3) a control processing system calculates a corresponding three-dimensional coordinate according to the image information of the (S2) and controls the object to move for a particular distance, (S4) the steps (S2) and (S3) are repeated, and the complete three-dimensional coordinate of the measured object is obtained. By using the method of the invention, the laser line formed on the measured object by the line laser is reflected for many times through an optical system, the image information of the laser line can be obtained from different positions with one camera, the block problem in a single-camera visual sensor is solved, the effect of a double-camera visual sensor is achieved, the cost is low, and a control processing system is simple.

A passively mode-locked picosecond laser device comprising a pump source, a laser crystal, a laser cavity, a mode-locked output structure is provided. In the device, the pump source is placed at the side of the incident end surface of the laser crystal; the laser cavity includes a plane reflective mirror and a first plano-concave mirror, the reflective mirror is placed opposite to the concave surface of the plano-concave mirror and located on the position of the focal radius of the plano-concave mirror. The normal direction of the reflective mirror and the axis of the plano-concave mirror form a small angle therebetween; the laser generated from the laser crystal oscillates in the laser cavity, and output through the mode-locked output structure. The device uses a stable cavity design of the equivalent confocal cavity, which can increase the optical path, reduce the repetition frequency, and significantly reduce the cavity length and volume.

The invention discloses a visual sensor of linear structure light scanning measurement equipment. The visual sensor concretely comprises a linear laser device, a camera, a left reflecting mirror, a right reflecting mirror, a semitransparent and semi-reflecting mirror and a rear reflecting mirror. Laser rays of the laser device formed on a measured object are reflected by the left reflecting mirror and the semitransparent and semi-reflecting mirror in turn, and finally form a first image about the laser rays on the camera. The laser rays on the measured object are also reflected by the right reflecting mirror and the rear reflecting mirror and then transmit through the semitransparent and semi-reflecting mirror and form a second image about the laser rays on the camera. Three-dimensional coordinates can be completed if the camera can acquire one of the images about the laser lays. The blocking problem of a single-camera visual sensor can be solved so that the effect of a double-camera visual sensor can be achieved, cost is lower and a control processing system is simpler.

The invention provides a 3D global pixel unit and a preparation method therefor. The 3D global pixel unit comprises a light-sensitive region manufactured on a first silicon substrate layer, and a 8T signal storage and reading circuit region manufactured on a second silicon substrate layer; the light-sensitive region and the 8T signal storage and reading circuit region are arranged in a vertical direction; the interconnection of the light-sensitive region and the 8T signal storage and reading circuit region is realized through connection of through holes; a reset switch and a transmission pipe are stored on a first storage node and a second storage node through a first switch tube and a second switch tube based on a certain time sequence; and finally, the signal voltage obtained in the exposure time is stored in the pixel unit for a certain time and then is read out, so that the global shutter exposure of the overall pixel unit array is realized consequently. According to the 3D global pixel unit, the perpendicular interconnection of the reading circuit and the light-sensitive diode is realized; and therefore, the light access between the external and the light-sensitive diode is improved, the optical isolation degree of a signal storage capacitor is improved, and the occupied chip area of the pixel unit is reduced as well.

The invention discloses a camera module and electronic equipment. The camera module comprises a first lens assembly, a second lens assembly and a third lens assembly, wherein the first lens assembly is located in a shell of the electronic equipment; the second lens assembly can retract into and extend out of the shell of the electronic equipment, and an included angle is formed between the secondlens assembly and the first lens assembly; the photosensitive element is arranged on one side of the first lens assembly; the light guide part is arranged between the first lens assembly and the second lens assembly, and light penetrating through the second lens assembly is suitable for being guided into the first lens assembly through the light guide part. According to the embodiment of the invention, the camera module has the advantages of long focal length and small height, the overall structure of the camera module is more compact, the overall size is smaller, the height is smaller, the packaging size is reduced, the thickness of the whole machine is reduced, the whole machine is lightened and thinned, and the placement of other devices in the whole machine is facilitated. Moreover, popup of the second lens assembly can be conveniently realized, and the optical path is prolonged.

The invention provides a 3D global pixel unit and a manufacturing method thereof. The 3D global pixel unit comprises a photosensitive diode manufactured on a first silicon substrate layer and a signal storage and reading-out circuit manufactured on a second silicon substrate layer, wherein the photosensitive diode and the signal storage and reading-out circuit are vertically arranged and are mutually connected through a through hole. According to the 3D global pixel unit, the back light technology and the 3D structure are employed, stereo unit structures are manufactured at different layers, the photosensitive diode and the signal storage and reading-out circuit are vertically arranged, so not only can light paths between the external part and the photosensitive diode are improved, light isolation of a signal storage capacitor is improved, and a chip area occupied by pixel units can be reduced.

The invention belongs to the technical field of optical fiber manufacturing, and particularly discloses a preparation method of a taper-core optical fiber with a gradually-changed core-to-package ratio and the taper-core optical fiber. The method comprises the following steps: depositing a glass particle loose layer on the inner wall of a reaction tube; performing rare earth ion doping on the glass particle loose layer; drying the reaction tube, conducting sintering at high temperature, so as to vitrify the glass particle loose layer, conducting fusing to form a solid preform core rod, and then polishing the solid preform core rod to obtain a conical core rod with a specified taper angle; and conducting processing to obtain a cylindrical glass rod which is provided with a conical hollow hole, combining the glass rod with the conical hollow hole with a conical core rod to obtain a conical core active optical fiber preform, and putting the conical core active optical fiber preform into a wire drawing tower for drawing to obtain the conical core optical fiber with a gradually changed core-to-cladding ratio. The taper core optical fiber is prepared by the method. The core-to-package ratio of the prepared taper core optical fiber with the gradually-changed core-to-package ratio is gradually changed along with the length of the optical fiber, pump light absorption of the optical fiber can be improved, optical fiber heat production can be balanced, and laser output power can be improved.

The invention provides a polaroid, a display panel and a display device, the display panel comprises a display substrate and a polaroid formed on the display substrate, and the polaroid comprises a polaroid body and an anti-dazzle antireflection layer formed on the polaroid body; the anti-dazzle antireflection layer comprises a hardened layer; the first extinction particle layer comprises a plurality of first extinction particles; the second extinction particle layer comprises a plurality of second extinction particles; the first extinction particles and the second extinction particles are dispersed in the hardened layer, and the second extinction particle layer is located between the first extinction particle layer and the polarization main body; the average refractive index of the first extinction particles is smaller than the average refractive index of the second extinction particles. According to the polaroid, the display panel and the display device, the haze of a product can be improved, the reflectivity of the product can be reduced, and the quality of a display picture can be improved.

A method for manufacturing an optical element comprises the steps that oblique evaporation is conducted on a base material to form at least one first inorganic oxide film pair on the surface of the base material; and forward evaporation is conducted on the base material to form at least one second inorganic oxide film pair on the first inorganic oxide film, and the material of any one of the first inorganic oxide film pair and the second inorganic oxide film pair comprises at least one of a metal element and silicon. By means of the optical element and the manufacturing method of the optical element, the effect of saving the manufacturing cost can be achieved for the optical element with a better optical effect and a smaller film thickness, and a wider application range is achieved.

An optical module for increasing magnification of a microscope includes an objective and an eyepiece between which is an optical path for light to travel. The optical includes light diverging elements for dividing the optical path into two parallel light paths after leaving the objective; and several orthonormally-arranged reflective elements including at least a first and a last reflective element, each reflective element having a reflective surface diagonal relative to the orthonormal arrangement of the elements, and also arranged to successively reflect the parallel light paths, from element to element, from the objective when the module is inserted in the optical microscope, beneath the eyepiece. Also included are light converging elements for converging the parallel paths into a single path before producing an image at the eyepiece.

A photovoltaic device or solar device including at least one luminescent solar concentrator (LSC) having an upper surface, a lower surface and one or more external sides; at least one perovskite-based photovoltaic cell or solar cell positioned on the outside of at least one of the external sides of said luminescent solar concentrator (LSC), the perovskite being selected from organometal trihalides. The photovoltaic device or solar device may be used advantageously in various applications necessitating the production of electrical energy by utilising light energy, in particular solar radiation energy such as, for example: building integrated photovoltaic (BIPV) systems, photovoltaic windows, greenhouses, photobioreactors, noise barriers, lighting equipment, design, advertising, automotive industry. Moreover, the photovoltaic device or solar device can be used both in stand-alone mode and in modular systems.