198 results about "Lens hood" patented technology

The invention discloses a field-of-view self-stabilization and self-adjustment hyperspectral camera system and a control method, and relates to the technical field of hyperspectral imaging. The system comprises a first imaging lens group, a movable slit, a two-dimensional linear driver, a slit outer layer light shield, a collimating lens group, a light splitting element, a second imaging lens group, an area array image sensor, an attitude sensor and a control acquisition circuit. Angle disturbance is obtained in real time, two-dimensional compensation displacement of the slit is calculated to drive the slit to move reversely, field-of-view collection is kept basically constant, collection is triggered according to a set rhythm, slit position and attitude data are recorded synchronously, and the pre-calibrated slit position and mapping of original coordinates and ideal coordinates are combined, so that field-of-view collection is completed. Geometric transformation and resampling dynamic correction are carried out on view field inclination aberration and spectrum bending aberration generated along with slit position changes, the environmental adaptability and reliability are improved, a hyperspectral data cube with accurate space coordinates and a stable spectrum curve is output, and the method is suitable for unmanned aerial vehicle-mounted hyperspectral remote sensing.

The present disclosure provides a matte box kit, including a matte box body, a mounting assembly, a first magnetic attachment, and a second magnetic attachment. The matte box body includes a first connection structure and a first light path extending along a first direction. The mounting assembly is configured to secure a lens and includes a second connection structure and a second light path extending along the first direction. The first magnetic attachment is arranged on the matte box body, and the second magnetic attachment is arranged on the mounting assembly. The first and second magnetic attachments are mutually attracted to pre-align and pre-connect the matte box body and the mounting assembly. The first connection structure and the second connection structure form a detachable fixation, aligning the first light path, the second light path, and the lens along the first direction such that they are opposed and in communication.

The invention relates to the technical field of rubber detection, in particular to a rubber part quality detection device and a detection method thereof. The device comprises a detection index plate, a support and two lifting devices are sequentially arranged on the periphery of the detection index plate, a laser diameter measuring sensor is arranged on the support, and the laser diameter measuring sensor is arranged above a vibration disc feeder in a suspended mode and used for measuring the diameter of a passing rubber part. A top view camera and a side view camera are connected to the lifting device, an annular lamp is fixedly arranged on the periphery of a lens of the top view camera, a supporting rod is fixedly connected to the lifting device corresponding to the side view camera, and a parallel backlight lamp is arranged at the end of the supporting rod; light shields are arranged on the peripheries of the annular lamp and the parallel backlight lamp, baffles are movably arranged in the light shields, and driving assemblies are connected between the baffles and the light shields; the driving assembly adjusts the rotation angle of the laser diameter measuring sensor according to detection data of the laser diameter measuring sensor, drives the baffle to move in the light shield, and adjusts the local shielding range of the baffle to the light emitting area of the corresponding light source.

An eyeshade structure for bilirubin detection includes a body, a first detection module, and a second detection module. The body includes a bottom plate and a side wall. The side wall is connected to the bottom plate and forms an accommodating space with the bottom plate. The first detection module is arranged on the bottom plate. The second detection module is arranged on the bottom plate and is adjacent to the first detection module. The first detection module and the second detection module each include a circuit board, a light-emitting element, an inner photographing element, and an outer photographing element. The circuit board is connected to the bottom plate. The light-emitting element is electrically connected to the circuit board. The inner photographing element is electrically connected to the circuit board. The outer photographing element is electrically connected to the circuit board.

This application provides a soft flash structure and a mobile phone. The soft flash structure includes a soft light, a soft lens, and a light shield. The curved reflective lens section has an incident curved surface and a reflecting curved surface on opposite sides, both curved away from the planar lens section. The planar lens section has a reflecting plane on opposite sides, and the condensing lens section has a condensing reflecting surface and a light emitting surface on opposite sides. The incident curved surface, one reflecting plane, and the condensing reflecting surface are connected sequentially, as are the reflecting curved surface, the other reflecting plane, and the light emitting surface. The soft light, the curved reflective lens section, the planar lens section, and the condensing lens section are housed together within the light shield. The light emitted by the soft light is at least partially incident on the incident curved surface and reflected sequentially by the reflecting surface, the two reflecting planes, and the condensing reflecting surface, before exiting through the light emitting surface. The aforementioned soft flash structure can form a gradually softened light spot with better light uniformity.

The invention discloses an in-situ ultraviolet and visible spectrophotometer with high measurement precision, and relates to the technical field of ultraviolet and visible spectrophotometers, the in-situ ultraviolet and visible spectrophotometer comprises a bottom shell, an optical unit is arranged on the inner wall of the bottom of the bottom shell, and a light source module and a monochromator are arranged in the optical unit; the top of the optical unit is fixedly connected with an operation platform through a supporting rod, the top of the operation platform is provided with a motor mounting frame, the top of the motor mounting frame is provided with a linear motor, the output end of the linear motor is connected with a lifting fixing plate, and the lifting fixing plate is of a Z-shaped structure. The end, away from the linear motor, of the lifting fixing plate is connected with a light shield, and the top of the light shield is provided with an optical fiber clamping frame. According to the method, result deviation caused by dilution multiple estimation errors in a traditional method is avoided, the dilution frequency of the high-concentration sample is reduced, reagent consumption and waste liquid generation are reduced, and the method conforms to the green analytical chemistry concept.

The utility model discloses an image acquisition unit based on an AI image flow measurement algorithm detection system, which comprises a camera, the front end of the camera is connected with a composite filter wheel through a flange plate, the front end of the composite filter wheel is sequentially connected with a polarization lens and a telescopic light shield, the outer wall of the telescopic light shield is provided with a light supplement array, and the light supplement array is connected with the composite filter wheel through a flange plate. An illuminance sensor is embedded in the inner wall of the telescopic light shield, and a control box is further installed on a shell of the composite filter wheel. Through the collaborative design of the telescopic light shield, the polarization lens, the composite filter wheel and the light supplement array, the problems of strong light overexposure, specular reflection, low illumination noise and the like are effectively solved, adaptive adjustment can be carried out by combining the illumination sensor to sense ambient light, the image quality under the complex illumination condition is remarkably improved, and the image quality is improved. And a reliable data source is provided for an AI flow measurement algorithm.

The utility model discloses a visual PIN needle detection equipment, including test board, the fixture seat of setting on test board and the CCD subassembly of setting on the fixture seat top, the CCD subassembly includes the coaxial light source, telecentric lens and CCD camera who sets gradually in vertical direction away from fixture seat, and CCD camera, telecentric lens and coaxial light source are on the same axis, and the light shield of setting the back and two side masks of test board is provided with on test board, and the connecting interface is provided with on test board, and the fixture seat includes the base and the positioning fixture of detachable setting on the base, and the positioning fixture is used for positioning installation detected component, and the support plate for supporting base is provided with on test board, and the sensor is provided with on the both sides of positioning fixture of support plate. The utility model discloses reasonable in structure design, and through the visual configuration of CCD camera + telecentric lens + coaxial light source, can realize to PIN needle and carry out detection, and thoroughly solved the problem that PIN needle is easy to wear in other detection mode among existing.

Two light-emitting units are to be prevented from overlapping each other in an image obtained through a camera. A tracked unit (30) has a first outer surface (A1) provided with a first light-emitting unit (H1), a second outer surface (A2) provided with a second light-emitting unit (H2), and a light shield portion (B). The second outer surface (A2) faces a second direction different from that of the first outer surface (A1). The light shield portion (B) is located further outside than the first light-emitting unit (H1) and the second light-emitting unit (H2).

This invention provides a single-degree-of-freedom deployable light shield to address the technical problem that existing rigid deployable light shields, with their columnar or planar configurations, are difficult to adapt to the obliquely tapered configuration required for large observation fields. The single-degree-of-freedom deployable light shield provided by this invention innovatively couples two sets of equivalent cranks and equivalent connecting rods connected by elastic drive hinges to a planar multi-stage scissor mechanism. This transforms the linear motion of the planar multi-stage scissor mechanism in the plane into the linear motion of the slider required by the equivalent crank-slider mechanism. Simultaneously, the symmetrically arranged equivalent crank-slider mechanisms on both sides provide in-plane coupling constraints for the planar multi-stage scissor mechanism, limiting its multiple degrees of freedom and forming a single-degree-of-freedom deployable mechanism. This single-degree-of-freedom deployable mechanism, in conjunction with the elastic drive hinges and locking device, achieves the deployment of the obliquely tapered light shield using fewer driving force interfaces while ensuring stability during the deployment process.

The conductive light shield for a probe station of the present invention for cable connection pin clips includes a conductive shield body and a light-absorbing layer. The conductive shield body covers the outside of the pin clip on the probe station. The conductive shield body includes a top wall and side walls extending downwards from the edge of the top wall, with one end of the side wall away from the top wall contacting the probe station. The conductive shield body provides electrostatic shielding and optical protection, ensuring that the pin clip is protected from electrostatic discharge and stray light interference during testing, thereby improving testing accuracy and stability. Cable openings are provided on the side walls to accommodate the cable layout between the pin clip and the testing machine, ensuring that the cable can pass smoothly and maintain a normal connection with the testing system. The light-absorbing layer is disposed on the surface of the conductive shield body. The organic carbon black coating has good light absorption properties and can effectively absorb stray light from the environment, reducing interference from light reflection on the optical alignment system.

The invention provides a rectangular field-of-view design method for an ultraviolet non-line-of-sight communication receiving end and application thereof, and belongs to the technical field of wireless optical communication, the method comprises the following steps: pre-determining the center distance length of a light shield and the upper field-of-view angle, the lower field-of-view angle, the left field-of-view angle and the right field-of-view angle of a rectangular receiving field-of-view; based on the center distance length, the upper view field angle, the lower view field angle, the left view field angle, the right view field angle and the width and length of the rectangular light sensing surface, calculating structural parameters of a light shield used for generating the rectangular receiving view field; wherein the structural parameters comprise the upper and lower edge lengths, the left and right edge lengths and the position of a vertical center point of a larger rectangular opening of the light shield. Through the design of the rectangular view field and the accurate matching of the rectangular light-sensitive surface, the photon receiving efficiency is remarkably improved, stray light and electromagnetic interference are effectively inhibited, and thus the signal-to-noise ratio of weak light signal detection and the system sensitivity are improved.

Systems and methods are disclosed to enable performance of a lens distance test in head-mounted displays (HMDs) to determine the distance between a user's eye and a lens of the HMD (e.g. the display lens in a virtual or augmented reality device). In embodiments, the HMD is configured to determine a current pose of the eye based on a series of captured eye images. The pose information is used to determine the distance from the apex of the cornea to a closest point on the lens. If the determined distance is too small or too large, an alert or notification is generated instructing to adjust the HMD or change the light seal to achieve better distancing, in order to reduce the risk of eye injury and / or improve user experience. In embodiments, the lens distance test may be repeated during a user session to reevaluate and / or monitor the lens distance.

The invention discloses a film deformation effect-oriented impact experiment device, which comprises a film clamping ring, a plurality of cameras, a plurality of spotlights and a clamping and releasing assembly, and is characterized in that the clamping and releasing assembly is used for clamping and releasing an impact body and a light shield, the plurality of cameras are synchronously triggered, and the spotlights are combined to assist in forming a synchronously triggered optical measurement system; the impact deformation effect of the film is captured in real time, and high-precision, full-field and non-contact deformation measurement can be realized under uniform illumination. According to the mechanical characterization method disclosed by the invention, the quantitative problem of instantaneous micro-deformation of the flexible OLED display module under the impact load can be effectively characterized through the technical means of carrying out the impact test through sample clamping, speckle preparation, camera setting, impact parameter setting and camera calibration; the technical blank of real-time representation equipment and method for the micro-deformation effect of the thin film under rigid back shielding in the prior art is filled, and a high-precision and non-contact evaluation means is provided for the impact resistance design of a flexible electronic device.

To improve appearance of a lighting fixture by suppressing leakage light from a gap between a fixture body and a light control member.SOLUTION: A lighting fixture as an example of an embodiment includes an outer shell cover 10 constituting a fixture body, and a shading hood 70 as a light control member attached to the outer shell cover 10. The light shielding hood 70 is detachably mounted on a lens 50 constituting a fixture body by fixing parts separately provided at a plurality of places. At least one of the outer cover 10 and the light shielding hood 70 has a light leakage suppression structure for suppressing light leakage from a gap 80 between the outer cover 10 and the light shielding hood 70.SELECTED DRAWING: Figure 9

This utility model proposes a camera lens hood, comprising: a lens hood housing with a filter mechanism for producing a filter effect; two magnetic magnets fixedly installed on the rear side of the lens hood housing, allowing the lens hood housing to be connected to a pocket camera via the magnetic magnets; and a light-shielding plate located on the front side of the lens hood housing. This lens hood is compact and convenient. The magnetic magnets facilitate the mounting and fixing of the lens hood housing onto the lens of a pocket camera. Simultaneously, the light-shielding plate prevents ambient light from entering the lens, making it easily compatible with pocket cameras. This allows professional photography accessories to reach the consumer market, enabling ordinary users to achieve near-professional light control capabilities at low cost, lowering the creative threshold, and effectively improving the shooting effect and playability of pocket cameras.

The application provides a space flexible extension sunshade based on a multi-section electric telescopic rod and a spacecraft, the space flexible extension sunshade comprises a sunshade film and a plurality of telescopic rods, the plurality of telescopic rods are fixedly installed on an outer optical camera base in a circumferential direction, an outer optical camera is located in a region formed by the telescopic rods arranged in the circumferential direction, and the sunshade film is installed between adjacent telescopic rods; when in a folding state, the telescopic rods are folded, and the sunshade film is synchronously folded and stored with the telescopic rods; when in an unfolding state, the telescopic rods are extended, and the sunshade film is synchronously unfolded with the telescopic rods. The electric telescopic rod mechanism is adopted as an extension mechanism of the sunshade film, compared with a traditional sunshade, the space flexible extension sunshade has the advantages of controllable extension process, large specific stiffness, large driving force, simple control mode and the like.

The invention relates to a multi-light-knife crack multi-point three-way displacement measuring device and method based on structured light, the device comprises an illumination light source arranged above a crack, a laser, a camera and a light shield forming a whole closed environment, and the laser generates light knife projection to irradiate the surface of the crack by utilizing the measurement characteristics of the structured light; a camera shoots a light knife image irradiated on the surface of the building with the crack, and the deformation displacement of the two sides of the crack in the Y direction is calculated through light knife center extraction; image information is obtained through the illumination light source, the displacement of the crack in the X direction and the Z direction is calculated in an image feature point capturing and image comparison mode, and therefore three-direction displacement measurement is achieved, and the crack monitoring device has the advantages of being wide in range, high in environmental adaptability, high in reliability and the like and can meet the crack monitoring requirement in a complex engineering scene.

The vehicle lighting fixture includes: multiple light sources that emit light respectively; a light shield having multiple through holes through which light emitted from the multiple light sources passes; and a projection lens having multiple lens portions, into which light passing through the through holes is incident, and which emits light for drawing towards the road surface. The projection lens has at least three lens portions, and includes a near lens portion that emits light towards the position closest to the vehicle and a far lens portion that emits light towards the position farthest from the vehicle. The far lens portion is located at the bottom, and at least two other lens portions are arranged side by side on the upper side of the far lens portion.

The present application relates to the technical field of light shielding cover in optical machine, and particularly relates to a sensing limiting type light shielding cover device and a light shielding method. The sensing limiting type light shielding cover device comprises a base, a detection assembly, a driving assembly, a light shielding cover, a hollow pressure sensor and a lens barrel assembly. The detection assembly and the lens barrel assembly are both fixed on the base, and the hollow pressure sensor is installed on the support shell of the detection assembly. The lens barrel assembly and the hollow pressure sensor are arranged in a gap, so that the light beam passing through the lens barrel assembly is connected with the light path of the detection assembly. The power end of the driving assembly is installed on the inner wall of the support shell of the detection assembly. The transmission end of the driving assembly is in transmission connection with the light shielding cover sleeved on the outer wall of the lens barrel assembly, and the light shielding cover is in threaded connection with the outer wall of the lens barrel assembly. The present application has simple structure, and realizes accurate shielding of stray light through the cooperation of the gear driving mechanism and the hollow pressure sensor.

An aperture unit comprises a base plate, a cover, a plurality of movable blades, a drive ring, a drive motor, and rotation shafts. The movable blades are disposed between the base plate and the cover, and adjust the amount of light passing through by varying the size of the opening by opening and closing operations. The drive ring is disposed between the base plate and the cover, is rotationally driven when the movable blades are opened and closed, and has a plurality of cam pins that move along cam grooves in the movable blades. The cover has protrusions that protrude toward the movable blades along the optical axis direction and restrict the movement of the movable blades in the optical axis direction.

The application discloses an inner baffle of a coaxial partial field optical system and a design method thereof, and solves the technical problems that the existing inner baffle cannot shield or absorb stray light generated by the reflection of light entering a primary mirror and the primary mirror, especially stray light generated near the edge of a secondary mirror or the edge of a secondary mirror support, and that the stray light directly enters a receiving reflection area of the primary mirror, thereby seriously affecting the detection result formed by receiving the light, and that a least square method is used for three-dimensional profile fitting, and the fitting process is complex. The inner baffle of the coaxial partial field optical system comprises an inner baffle body arranged between the primary mirror and the secondary mirror, wherein the inner baffle body comprises an inner baffle interface, a plurality of light blocking rings and a connecting piece, the plurality of light blocking rings are arranged in parallel and sequentially arranged along the optical axis direction, two adjacent light blocking rings are axially connected through the connecting piece, the connecting part of the two is located in the corresponding end face of the light blocking ring, one end of the inner baffle interface is connected with one of the plurality of light blocking rings close to the primary mirror, and the other end is connected with the primary mirror.

To provide a blind that can further improve the shielding performance in a shielded state. [Solution] The system comprises a plurality of slats arranged vertically, first and second shielding materials, a bottom rail, and an opening / closing mechanism. The first shielding material is provided on the front side of the plurality of slats and is light-transmitting. The second shielding material is provided on the rear side of the plurality of slats, opposite the first shielding material, and is light-transmitting. The bottom rail has a connecting portion located closer to the center in the front-rear direction than the rear end, to which the lower end of the second shielding material, which is rotated at the rear end of the bottom rail when the plurality of slats are in a light-gathering state where they are approximately horizontal, is connected from the underside of the bottom rail. The opening / closing mechanism is provided so that the first and second shielding materials can be wound up and unwound to enable opening and closing of the plurality of slats, and moves the first and second shielding materials relative to each other so that the front end of the bottom rail faces downward when the plurality of slats are in a shielding state where they are approximately vertical.

The present application relates to a kind of wind power blade defect intelligent identification and positioning inspection system;The inspection system includes mobile chassis so that it can be kept on wind turbine pillar and can move up and down along the pillar;The inspection system also includes extension platform, for the target blade is covered into around cover unit;The around cover unit has light shield, can cover target blade to isolate external light;In the around cover, the inspection unit can be around the target blade is set, so that the target blade is checked quickly based on optical characteristic quantity, finally realizes the intelligent wind power blade inspection of high efficiency and short cycle.

The utility model belongs to the technical field of bridge dynamic displacement measurement, and particularly relates to a bridge dynamic displacement measuring device based on machine vision. The problem that in the prior art, a camera is frequently interfered by the external light environment in the laser beam receiving process is solved. Comprising a mounting box, an industrial camera is arranged in the mounting box, a shading assembly is arranged outside the mounting box, the shading assembly comprises a fixing frame fixed to one side of the mounting box, a shading cover is fixed to the end of the fixing frame, and a mounting base is arranged at the extending end of the shading cover. The shading assembly is arranged on one side of the industrial camera, and the shading assembly shields and protects the lens of the industrial camera to ensure that the industrial camera can completely shoot the laser beam emitted by the laser emitter located on one side of the pier, so that the industrial camera can continuously shoot the laser beam, and the purpose of measurement is achieved.

The present disclosure provides an active interactive pest inspection intelligent electronic eye system and method. The system is installed on a mobile platform, which includes a mobile platform chassis (1), a gimbal mast (2), a depth camera (3), an infrared camera (4), an active near-infrared lighting ring (5), a mechanical arm (6), a flexible actuator (7), a computing unit (8), a body (9), a communication and positioning unit (10), and an anti-glare shade (11). The body (9) is arranged on the mobile platform chassis (1), and the body (9) is provided with a power supply. The mechanical arm (6) and the computing unit (8) are respectively arranged at both ends of the upper surface of the body (9), the first end of the mechanical arm (6) is connected to the flexible actuator (7), and the second end of the mechanical arm (6) close to the flexible actuator (7) is provided with the gimbal mast (2). The communication and positioning unit (10) is arranged on the computing unit (8). The anti-glare shade (11), the active near-infrared lighting ring (5), the depth camera (3), and the infrared camera (4) are all arranged on the gimbal mast (2).

This invention discloses a DMD-based cross-type optical path beam splitter, comprising an ultraviolet imaging lens, a dichroic mirror, a digital micromirror device (DMD), an ultraviolet filter, an ultraviolet detector, a visible light camera, and a light collector, as well as an optical path shield. The DMD is electrically connected to a DMD controller. This invention also discloses an ultraviolet imaging block detection method, including constructing an imaging device based on the aforementioned beam splitter; the beam splitter splits the incident mixed light; an FPGA control module performs multi-layer segmentation iterative scanning to locate the ultraviolet light region generated by corona discharge and generate an ultraviolet image; the FPGA control module simultaneously acquires visible light video signals; the FPGA control module fuses the visible light video signals and ultraviolet image signals and displays them, completing the corona discharge location positioning. This invention solves the problems of delayed corona discharge detection and early warning, high detection equipment cost, and slow imaging speed in existing technologies.

The utility model relates to the technical field of plant protection observation, concretely is a kind of portable fluorescence observation device, its technical scheme main point is, including: article table, the top surface of article table is provided with sunshade, the top surface of sunshade is opened with taking sight hole, the top surface of sunshade is opened with several mounting holes;When using, ultraviolet LED lamp can emit ultraviolet light, focus by lens again, and after purifying by optical filter, target is irradiated, at this time, taking sight hole is used, camera or mobile phone is used to photograph target, capture fluorescent spot image, the reflector of ultraviolet LED middle lamp utilizes the reflection structure of its inner wall, and the divergent light emitted by ultraviolet LED lamp is effectively collected and guided, and the handle can be used to realize the convenience of the equipment, and by control switch, not only realizes the one-key power control of ultraviolet LED lamp, operation is more simple, intuitive, and when using in situ, one hand can hold sunshade, avoid device inclination or displacement due to moving back and forth or lifting.

The invention relates to the technical field of light shields in optical machines, in particular to a sensing limiting type light shield device and a light shielding method, and the sensing limiting type light shield device comprises a base, a detection assembly, a driving assembly, a light shield, a hollow pressure sensor and a lens cone assembly. The detection assembly and the lens cone assembly are both fixed on the base, and the hollow pressure sensor is installed on a supporting shell of the detection assembly; the lens cone assembly and the hollow pressure sensor are arranged at an interval, so that a light beam penetrating through the lens cone assembly is connected with a light path of the detection assembly; the power end of the driving assembly is installed on the inner wall of the supporting shell of the detection assembly. The transmission end of the driving assembly is in transmission connection with a light shield sleeving the outer wall of the lens cone assembly, and the light shield is in threaded connection with the outer wall of the lens cone assembly. The stray light shielding device is simple in structure, and precise shielding of stray light is achieved through cooperation of the gear driving mechanism and the hollow pressure sensor.