57 results about "Oblique reflection" patented technology

The invention proposes a narrow-linewidth and high-performance tunable optical detector based on a non-periodic sub-wavelength grating, and relates to the technical field of photoelectron. The high-performance optical detector comprises a filtering cavity bottom lens (DBR), a filtering cavity, a filtering cavity top lens (DBR), an absorption cavity and a non-periodic sub-wavelength grating oblique reflection mirror from bottom to top. In the optical detector, the optical cavity length is changed by electric tuning or thermal tuning to achieve a selective tuning function of wavelength; and the non-periodic sub-wavelength grating inclined reflection mirror is used for achieving oblique reflection on incident light at different angles for many times, so that the incident light can be repeatedly absorbed by an absorption layer, and the high-speed and high-quantum efficiency performance of a device is achieved. The optical detector has the characteristics of narrow linewidth, high quantum efficiency, high frequency response bandwidth and the like, is easy to integrate and is tunable, and can be widely applied to the field of optical communication and optical signal processing.

A dew condensation detecting apparatus is independent of a wavelength of a detected light beam, and has a heat capacity of the detecting apparatus body so as to miniaturize the apparatus. A light beam is introduced from a light emitting element into the transparent plate and travels through the transparent plate with repetitions of total reflection. It is then detected by a light receiving element to detect a degree of dew condensation on a surface of the transparent plate in accordance with a variation in detected light quantity. The transparent plate is formed of two sheet glasses bonded to each other by an intermediate film, a part of which is a reflection film. A micro-mirror array for turn-back reflection, composed of oblique reflection surfaces inclined to the surfaces of the spaced sheet glasses, is provided near one end of the reflection film.

A surface lighting device (1) includes a light guide plate (11), a point light source (14), and a light reflector (13) substantially juxtaposed with the light guide plate. The light guide plate has a light incident surface (111). The point light source is located between one end of the light reflector and the light incident surface. The light reflector comprises a reflecting portion (131) obliquely opposite to the light incident surface. The reflecting portion is adapted to receive light beams emitted from the point light source, and reflect the received light into the light incident surface of the light guide plate.

The application provides a virtual reality head-mounted device comprising a device body with a convex lens assembled, a camera assembled to the device body, and a semi-reflective semi-transparent mirror. The semi-reflective semi-transparent mirror is arranged at one side, far away from the user, of the convex lens; the camera is arranged between the convex lens and the semi-reflective semi-transparent mirror; and the mirror surface of the semi-reflective semi-transparent mirror is arranged obliquely, so that the eye infrared image of the user faces the camera for oblique reflection. Therefore, the collection precision of the eye infrared image of the user can be improved.

A device manufacturing method according to one embodiment of the invention includes positioning a reflective patterning structure to reflect at least a portion of a beam of radiation as a patterned beam of radiation having a pattern in its cross-section. The method also includes using a projection system to project the patterned beam of radiation to form an image on a target portion of a layer of radiation-sensitive material. Positioning includes at least one among shifting and tilting a nominal reflective surface of the reflective patterning structure with respect to a nominal object plane of the projection system according to a distortion value.

The invention discloses a multispectral refraction-reflection type optical system. The multispectral refraction-reflection type optical system comprises a refraction-reflection type afocal telescope system and a long-wave infrared imaging system, wherein the refraction-reflection type afocal telescope system comprises a spherical fairing, a scanning plane reflecting mirror, a primary reflecting mirror and a secondary reflecting mirror; the long-wave infrared imaging system comprises a tilted reflecting mirror, an image offsetting rotating prism, an optical imaging component group and a detector; and collimation lens groups are arranged between the primary reflecting mirror and the secondary reflecting mirror and close to the primary reflecting mirror. The multispectral refraction-reflection type optical system has the advantages that: the spatial dimension is compact, the weight of an optical system is reduced, the system stiffness is improved, and the high-precision optical axis pointing is facilitated; and the multispectral refraction-reflection type optical system is suitable for meeting the requirement of comprehensively considering quick search, the precise pointing of aiming lines, the detection of multispectral broad wave bands and system compactness, and has high radiation transmission efficiency, simple aberration balance, and low processing, detection, assembly and adjustment cost.

A light guide plate including a first surface, a second surface, at least one light incident surface, and a plurality of groove sets is provided. The light incident surface connects the first surface and the second surface. The groove sets are separately disposed on the second surface. Each of the groove sets includes a plurality of curved grooves. Each of the curved grooves has a curved inclined reflective surface and a curved back-to-light surface connected thereto. The curved inclined reflective surface is inclined with respect to the first surface. The curved grooves of each of the groove sets curve toward the same curving direction. The curved inclined reflective surface of one of two adjacent curved grooves is connected to the curved back-to-light surface of the other one of the two adjacent curved grooves through a connection surface. A light source module is also provided. By using the light guide plate, the light loss can be reduced. The light source module provided in the invention has higher light utilization rate.

A backlight unit of a liquid crystal display device includes a light source and a reflective means, the reflective means having a plurality of sloping reflective surfaces for reflecting light emitted from the light source to a light-irradiation surface of a liquid crystal panel at an angle of about 30° or less with respect to a line perpendicular with the light-irradiation surface of the liquid crystal panel thereby to improve light efficiency.

The invention discloses a multifunctional large airflow field two-dimensional imaging detection device and method. The device comprises a camera, a lens, an optical adjustment frame, a laser, an inclined reflector, an optical flat plate, a two-dimensional rotary lifting platform, a movable base, a computer data acquisition and processing system, an illumination light source and a background screen. A laser is used as an illumination light source, a corner reflection array, a microcrystalline prism reflective film or a natural target background is used as a cooperative target, and two-dimensional imaging detection of an atmospheric flow field and flow display and quantitative measurement of transparent fluid are realized by combining laser shadow and background schlieren technical principles. The multifunctional large airflow field two-dimensional imaging detection device and method have the advantages that hardware is simple and easy to implement, the algorithm speed is high, precisionis high, quasi real-time performance is achieved, the device and method can be applied indoors and outdoors, the view field size and detection distance are not limited, functions are diversified, andapplication is wide.

The invention relates to the technical field of display, in particular to a backlight module and a display device. The backlight module comprises a light guiding plate and a light emitting assembly capable of emitting light rays and making the emitted light rays enter into the light guiding plate in a parallel mode; the light guiding plate further includes a light inlet surface, a bottom surface, a light outlet surface on the top and at least one oblique reflection surface, wherein the oblique reflection surface is positioned between the bottom surface and the light outlet surface, and the included angle between the oblique reflection surface and the plane, in the extension direction away from the light inlet surface, of the bottom surface is smaller then 90 degrees; the light inlet surface is positioned on one side of the light guiding plate. By the light emitting assembly, parallel light is emitted to the light inlet surface and reflected out of the light guiding plate by the oblique reflection surface, namely the light guiding plate does not need to be added with optical films, the condition that light is absorbed by the optical films is avoided, and the brightness of the parallel light emitted by the light guiding plate is not damaged; moreover, by not adding peep-proof protection films and other materials, the backlight assembly is much thinner.

A MEMS mirror is disclosed having thickness correlated with the intensity profile of an impinging optical beam, so as to reduce moment of inertia of the MEMS mirror while preserving optical quality of the reflected beam. It is the mirror edges that contribute the most to the moment of inertia, while it is generally the mirror center that contributes the most to a reduction of the quality of an optical beam reflected from the mirror. Accordingly, by providing a mirror having laterally varying thickness matched to the local variation of the intensity of the optical beam, the quality of the latter may be preserved while the moment of inertia of the mirror may be significantly reduced. The thickness of MEMS mirrors may be varied continuously or stepwise; in one direction or in two mutually orthogonal directions.

The invention discloses an infrared temperature measurement scanning device of an internal cylinder of a rotary kiln heat exchanger device. The infrared temperature measurement scanning device comprises a rotary kiln cylinder, a plurality of surrounded thermal energy converters and a plurality of surrounded thermal energy converter installation brackets, wherein the installation brackets are respectively fixedly provided with a pipeline, the rear end of the pipeline is fixedly connected with an external detector protection shell in which an infrared detector and a control circuit board are respectively arranged; the front end of the pipeline is fixedly connected with an infrared-transmitted glass tube, the front end of the infrared-transmitted glass tube is fixedly connected with an external motor protection shell in which a motor is arranged, the output shaft of the motor is extended into the infrared-transmitted glass tube and fixedly connected with an oblique reflection light lens. The infrared temperature measurement scanning device is a probing scanning mechanism and can be probed into each surrounded thermal energy converter, the probing depth is in the range from 0 to 5m, the scanning device is heat-resistant and can operate at high temperature environment in a long term, and the rotary kiln cylinder in the surrounded thermal energy converter can be scanned by a big angle without a dead angle.

The present invention relates, in general, to a light modulator having a variable blaze diffraction grating and, more particularly, to a light modulator having a variable blaze diffraction grating, in which a diffraction member rotates due to piezoelectric force so as to incline a reflective surface.

In order to solve the technical problems that an existing modulation transfer absorption frequency stabilization light path device is difficult to adjust and poor in stability, the invention providesa high-stability modulation transfer spectrum frequency stabilization light path device, signal light and modulated light are reflected by using a trapezoidal prism and a polarization beam splitter; compared with a reflector structure, the device saves optical machine elements of an optical system, and simplifies the structure; during light path adjustment, only the trapezoidal prism or the secondpolarization beam splitter with the inclined reflecting surface needs to be adjusted, so the adjustment difficulty is greatly reduced, and the requirement for light path collimation is low; after thetrapezoidal prism is fixed, the light path is not easily affected by external vibration, temperature and other environments, and the stability of the light path is improved.

The invention discloses a light guide plate and a light source module. The light guide plate comprises a first surface, a second surface, at least one light incidence surface and a plurality of groove groups, wherein the second surface is opposite to the first surface; the light incidence surface is connected with the first surface and the second surface; the groove groups are dispersedly formed on the second surface; each groove group comprises a plurality of bent grooves; each bent groove has a bent inclined reflecting surface and a bent backlight side surface which are connected with each other; the bent inclined reflecting surface is inclined relative to the first surface; the bent grooves in each groove group are bent towards the same direction; and the bent inclined reflecting surface of one of two adjacent bent grooves and the bent backlight side surface of the other one of the two adjacent bent grooves are connected with each other. A light source module is also provided.

The invention discloses a visual detection device comprising a sample placing surface, a reflection block and a camera that are sequentially arranged along a straight line. The reflection block includes a plurality of reflection surfaces that are sequentially connected to form a through hole penetrating the reflection block; the cross section of the through hole is gradually reduced in a directionfrom the camera to the placing surface. In addition, a visual detection method comprises the following steps: step a, adjusting a distance between a sample and each of a plurality of inclined reflecting surfaces; step b, collecting mirror images of a sample in a polygon mirror by using optical imaging equipment; step c, extracting and splicing mirror images in the reflection block by using an image processing program; and step d, carrying out defect analysis and marking on the images acquired in batches by using the image processing program. According to the invention, multi-surface images ofthe product are simultaneously collected by combining one camera with the polygonal mirror, so that the hardware cost and the acquisition time are reduced substantially by being compared with the mode of simultaneous detection by using a plurality of CCD cameras; and the visual detection device and visual detection method are applied to the technical field of detection equipment.

The invention discloses a material dynamic damage evolution experiment method of a high temporal-spatial resolution. A flying sheet is controlled to hit against a large head end surface of a cone sample. After impact, a flying sheet impact compression wave and a sample impact compression wave are generated to large head surfaces of the flying sheet and the cone sample. When a sample compression wave front reaches a conical surface of the cone sample, oblique reflection is performed to form a sample sparse wave, simultaneously, a flying sheet sparse wave is spread towards a small head end direction in plane wave form in the cone sample, and forms a flying sheet sparse wave front. The sample sparse wave and the flying sheet sparse wave front encounter in the cone sample, and generate stretching stress and damages, and finally form a spall damage surface parallel to a cone bus as time goes on. The method has advantages that material dynamic stretching damage and destroy information underdifferent impulse conditions after single loading can be acquired; and a characteristic of the high temporal-spatial resolution is possessed, which is beneficial to study of a spall strength criteriontheory and investigation of microscopic damage evolution physical image information in the sample.

The invention relates to a three-dimensional rotating angle measurement method and device adopted by the same. The three-dimensional rotating angle measurement device comprises a measurement device composed of two two-dimensional auto-collimators and a reflection part which is a cooperative target. During measurement, the first auto-collimator in the measurement device collimates the forward reflection face of the reflection part and measures the two-dimensional angle change amount of the forward reflection face of the reflection part according to an optical auto-collimation measurement principle. In the similar way, the second auto-collimator measures the two-dimensional angle change amount of the oblique reflection face of the reflection part. A data processing center of the three-dimensional measurement device can calculate three-dimensional rotating angle values according to a formula after receiving angle information, achieves the three-dimensional posture change amount of a measured object in space and has the advantages of being simple in achievement mode, mature and reliable in technology and convenient to install and operate.

A backlight illuminating module includes a first supporting base, a plurality of first illuminating units, and a light reflection housing. The light reflection housing includes a first light reflection member having a first inclined reflection surface, a first vertical optical surface and a plurality of first prisms provided in a first light reflection chamber, wherein when the first illuminating units are activated to generate illumination, the illumination is arranged to be reflected and diffracted by the first inclined reflection surface, the first vertical optical surface and the first prisms to produce an uniform line source of light of the backlight illuminating module.

The invention provides a camera. The camera comprises a support, a lens assembly and a reflector assembly. The lens assembly comprises a lens, and the lens comprises a lens element arranged at the front end of the lens. The reflector assembly and the lens assembly are arranged on the support in a first direction. The reflector assembly comprises a reflector. The lens assembly is rotatably arranged on the support. The reflector is rotatably arranged on the support with a second direction perpendicular to the first direction as the axis. The lens element faces the reflector, and the reflector inclines relative to the lens element. The reflector is used for reflecting at least part of incident light to the lens element. The rotation of the reflector and the rotation of the lens assembly can enlarge the monitoring range, and the large-range monitoring of the camera is realized.

An optical architecture for a high-energy laser that directs a collimated laser beam through an aperture stop at a desired angle. In one embodiment, the optical architecture includes a single tilt mirror and three stationary mirrors that direct the laser beam in one dimension. The laser beam is reflected off of the mirrors in the same plane and is reflected off of the tilt mirror three times. The first two reflections off of the tilt mirror translate the beam and the third reflection causes the beam to be directed at the desired angle. In another embodiment, the optical architecture includes a single tip-tilt mirror and eight stationary mirrors that direct the beam in two dimensions. The laser beam is reflected off of the mirrors in two planes and is reflected off of the tip-tilt mirror three times. The first two reflections off of the tip-tilt mirror translate the beam and the third reflection causes the beam to be directed at the desired angle.

The invention discloses a built-in oblique reflection multichannel ultrasonic flow measurement module and a flowmeter, and belongs to the technical field of flow measurement. The measurement module comprises a measurement pipe and ultrasonic transducers communicated with the internal flow channel of the measurement pipe, the measurement pipe is a polygonal prism, and the internal flow channel of the measurement pipe has the same diameter as a measured pipeline; the ultrasonic transducers are mounted on the measuring pipe in pairs, and each pair of ultrasonic transducers reflects sound wave energy through the wall surface of the internal flow channel in an oblique reflection manner; and when gas enters the internal flow channel, the gas flow is determined according to the measured sound wave transmission time by measuring the transmission time between the paired ultrasonic transducers. Through the integrated design of multiple groups of ultrasonic transducers, no detachable part is arranged outside the module. The measuring pipe is a polygonal prism, so that the mounting positions of the transducers are more, and the overall size is reduced. The transducer is arranged on the surfacebody edge surface of the polygonal edge body, and the edge surface is a plane.

The invention discloses a sodium guide star uplink laser light field pre-correction system. The system comprises a sodium guided star laser, a beam expanding lens, an inclined reflector, an inclined controller, a spectroscope, a sodium guide star transmitting telescope and an inclined detection camera; the system further comprises a light field detection system and a light field pre-correction system; the light field detection system comprises a light field detector and a light field controller; the light field pre-correction system comprises a first deformable mirror, a Fourier transform lens, a light splitting mechanism and a second deformable mirror; and the Fourier transform lens is located in a Fraunhofer diffraction region of the first deformable mirror. By the adoption of the scheme, real-time compensation can be conducted on amplitude and phase disturbance generated by atmospheric turbulence at the same time, light spots obtained after pre-correction are closer to the diffraction limit, and the number of returned light of the sodium guide star is more stable, so that performance of a rear-end self-adaptive optical system can be effectively improved, and development of the self-adaptive optical system and the theory is promoted.

The invention discloses an artificial multicolor guide star array emission system based on multilayer conjugate adaptive optics. The system comprises a laser, a beam expanding lens group, a light splitting mechanism, an inclined reflector, a transmitting telescope and an inclined detection system; the inclined detection system comprises a wedge mirror, an inclined detector and a controller; the transmitting telescope has the functions of emitting laser and imaging a target at the same time; laser emitted from the laser device is expanded by the beam expanding lenses, then passes through the light splitting mechanism, is reflected by the inclined reflector, and is expanded and focused by the transmitting telescope, so that high-altitude sodium atoms generate primary excitation and generatea multi-color guide star array with at least two wave bands. The multi-color guide star is used for detecting and correcting the inclination aberration of the uplink path to obtain the guide star array with the determined position. The fusion and decoupling errors caused by the uncertain position of the guide star array can be obviously reduced. The performance of the multi-layer conjugate adaptive optical system is improved. The turbulence detection precision of multiple beacons is effectively improved. The structure is simple and compact, and the application range is wide.

Various implementations disclosed herein include a distance measuring unit for signal transition time-based measurement of a distance to an object located in a detection field, with an emitter unit with multiple emitters, each designed to emit pulses in the form of electromagnetic radiation, a receiver unit for receiving the electromagnetic radiation after a distance-dependent transition time, and a tiltable mirror, wherein the distance measuring unit is configured such that a first of the emitters emits multiple pulses sequentially via the mirror, including at a first time in a first solid angle segment in a first angular position of the mirror, and at a second time in a second solid angle segment in a second angular position of the mirror; and a second of the emitters also emits a pulse in at least one of the solid angle segments via the mirror.

The present invention relates to the field of semiconductor photoelectronic device, and provides a resonant cavity based on a non-periodic sub-wavelength grating and a distributed bragg reflector (DBR). The resonant cavity based on a non-periodic sub-wavelength grating and a DBR has a feature of controlling distribution of a light standing wave field in the resonant cavity. The structure of the resonant cavity comprises from top to bottom: a DBR, a resonant cavity and a non-periodic sub-wavelength grating reflector. A planar incident light reaches the non-periodic sub-wavelength grating reflector through the resonant cavity to realize oblique reflection deflect towards the center of the resonant cavity, and the oblique reflection is subjected to multiple oscillation and coupling in the resonant cavity to form a stable standing wave field with light field energy concentrated on the middle portion of the resonant cavity, wherein the width of the standing wave field is determined by a structure of the non-periodic sub-wavelength grating, and therefore the structure of the non-periodic sub-wavelength grating is changed to achieve control of the width of the standing wave field in the resonant cavity. The problem is solved that a traditional resonant cavity cannot control the width of the standing wave field, and the resonant cavity based on the non-periodic sub-wavelength grating and the distributed bragg reflector can be widely applicable to the optical communication and optical system fields.

The invention relates to a tiltable mirror (1) for optical image stabilization in an optical imaging system (100), the tiltable mirror (1) comprising a rigid mirror substrate (1S) with a planar reflective layer (1R) on a front side of the mirror substrate (1S) for reflecting incident light (500) in an optical imaging system (100); a mirror frame (1F), wherein the mirror substrate (1S) is arranged tiltably in the mirror frame (1F); an actuator (2) for tilting the mirror substrate (1S) around a primary (x) and a secondary (y) tilt axis with respect to the mirror frame (1F). The invention further relates to an optical imaging system comprising a tiltable mirror (1) according to the invention.

The invention discloses a sodium beacon pre-correction system based on ultra-short pulse multilayer conjugate adaptive optics. The system comprises an ultra-short pulse sodium beacon laser, a beam expanding lens, an optical splitter A, an inclined reflector, at least two stages of optical path conjugated turbulence correction units, a beam expanding lens group, a sodium beacon transmitting telescope, an inclination detector and an inclination controller. The turbulence correction unit comprises an optical splitter B close to the transmitting end and a deformable mirror located between the optical splitter B and the beam expanding lens set, the optical splitter B is provided with a turbulence detector corresponding to the optical splitter B, the turbulence detector is provided with a turbulence controller matched with the turbulence detector, and the turbulence controller is used for controlling the deformable mirror corresponding to the turbulence controller. The layered detection andconjugate correction are carried out on the uplink path turbulence, so that the amplitude and phase fluctuation generated by the uplink path turbulence is effectively overcome, the sodium beacon lightspot expansion and flicker effects are avoided, and the method is easy to implement, is wide in application range, is capable of effectively improving the correction performance of the observation telescope rear-end AO system and the like.

The present invention relates to the field of semiconductor photoelectronic device, and provides a resonant cavity based on a non-periodic sub-wavelength grating and a distributed bragg reflector (DBR). The resonant cavity based on a non-periodic sub-wavelength grating and a DBR has a feature of controlling distribution of a light standing wave field in the resonant cavity. The structure of the resonant cavity comprises from top to bottom: a DBR, a resonant cavity and a non-periodic sub-wavelength grating reflector. A planar incident light reaches the non-periodic sub-wavelength grating reflector through the resonant cavity to realize oblique reflection deflect towards the center of the resonant cavity, and the oblique reflection is subjected to multiple oscillation and coupling in the resonant cavity to form a stable standing wave field with light field energy concentrated on the middle portion of the resonant cavity, wherein the width of the standing wave field is determined by a structure of the non-periodic sub-wavelength grating, and therefore the structure of the non-periodic sub-wavelength grating is changed to achieve control of the width of the standing wave field in the resonant cavity. The problem is solved that a traditional resonant cavity cannot control the width of the standing wave field, and the resonant cavity based on the non-periodic sub-wavelength grating and the distributed bragg reflector can be widely applicable to the optical communication and optical system fields.