39results about How to "Reduce stray light interference" patented technology

The invention discloses a low-stray-light fast spectrometer and a measurement method thereof. The spectrometer includes a light signal collection mechanism and an optical platform and is characterized in that the optical platform includes a bandpass color wheel; a group of bandpass color filters and via-holes are arranged on the bandpass color wheel; and an incident light reaches a dispersive element through the bandpass color filters or the via-holes, is split and then received by an array detector. Through rotation of the bandpass color wheel, the incident light scans the bandpass color filters one by one, and the spectrometer accurately detects a sample to be detected segment by segment to correspond to a response function. When a similar sample with similar spectral characteristics is measured, the sample is accurately detected segment by segment and is subjected to full-spectrum fast detection through the via-holes, the stray light correction factor can be calculated according to the two measurement results, and the similar sample is subjected to the full-spectrum fast detection and is corrected by the stray light correction factor to achieve fast accurate detection. The method can effectively reduce the measurement stray light of the fast spectrometer and fast accurately measure the spectrum curves and related spectroradiometric parameters of the sample with similar spectral characteristics.

The invention provides an optical projection tomography device and a method based on a camera array. A light source array and the camera array are utilized to realize two-dimensional projection images of different exposures of an organism, and high-quality reconstruction of a three-dimensional image of a biological sample is realized through a high dynamic range imaging technique and a filter back projection algorithm. According to the optical projection tomography device and the method based on the camera array, an imaging module mainly comprises a scanning acquisition module and a data processing module, wherein the scanning acquisition module mainly comprises: (1) a light source module formed by the light source array, an optical lens, a beam expander and a polarizer; (2) a biological sample platform formed by a stepping motor rotating platform and a sample clamping device; (3) a two-dimensional projection image acquisition module formed by a microscope, the camera array, a polarization analyzer and a filter plate; the data processing module mainly comprises: (1) high dynamic range image synthesis; (2) rotary center position correction; (3) filter back projection three-dimensional reconstruction.

The invention discloses a space filtering based light shield of a star sensor. The light shield comprises a cover casing and first to sixth shading rings, and the first to sixth shading rings are arranged from an entrance pupil position to the exit pupil position sequentially and mounted in the cover casing; the first shading ring and the sixth shading ring are arranged at the two ends of the cover casing opposite to each other, and a connecting line between cutting edges of the first shading ring and the sixth shading ring and a center line of the cover casing form an included angle of 16 degree; and the middle portions of the fourth, fifth and sixth shading rings are provided with optical filters in a rotational installation manner respectively. The light shield has the advantages that the cover casing, the shading rings and the optical filters form an optical-mechanical assembly of the light shield, and it is ensured that the star sensor can output effective attitude data when a sun shielding angle is greater than 20 degree; a non-imaging spectrum of the sun shielding angle greater than 20 degree can reach the entrance pupil position of an optical system via at least twice absorptive scattering; and the light shield has a high light shielding performance, and is capable of spectrum filtering.

The embodiment of the invention provides a display device and electronic equipment. The display device comprises a first display area and a second display area, and the light transmittance of the first display area is greater than that of the second display area. The first display area comprises a driving circuit layer, an anode layer, a light emitting layer and a common electrode layer which arearranged in a stacked mode, and the driving circuit layer, the anode layer and the common electrode layer work together to drive the light emitting layer. A shading block is arranged between the lightemitting layer and the driving circuit layer. The driving circuit layer comprises a first driving unit, the first driving unit and the shading block are at least partially and oppositely arranged, and the shading block is used for shading an external optical signal irradiated to the first driving unit. The shading block can be used for shading an external light signal irradiated to the first driving unit of the driving circuit layer, so that the problem of stray light interference caused by reflection and refraction of the first driving unit is reduced.

The invention discloses a distributing photometer including two independent bases, a rotary arm which rotates around a horizontal rotary central line arranged on a first base, an ellipse circumrotate plane optical reflector, a first optical detector, a second optical detector and a second laser ejector are arranged on the rotary arm and rotates around the tested lighting source with the rotary arm, the tested lighting source can rotate around the own vertical axis, a vertical round or ellipse plane optical reflector is arranged on the second base; a lighting beam from the tested lighting source is reflected to the vertical optical reflector by rotating the optical reflector, normal incidence of the lighting beam on the first optical detector is reflected by the vertical optical reflector, tests of large and medium lamps and lanterns can be implemented with long distance; the second optical detector aims at the tested lighting source directly, thus implementing tests of small lamps and lanterns of short distance. The testing chamber of the invention occupies less space with high testing precision, no extra calibration or adjusting instrument is needed in implementing tests of diverse testing arm length (testing distance) by adopting different optical detectors.

The invention provides a phototoxicity experiment detection device which comprises a lightproof experimental bin body. The lightproof experimental bin body is internally provided with a plurality of uviol lamps with UVA of single wavelength of 365nm as an experimental light source and a plurality of small animals fixing brackets. The front face of the experimental bin body is provided with movable observation windows on which glass capable of filtering ultraviolet waves is arranged. A sterilizer, a ventilation installation and a temperature and humidity controller are arranged in the experimental bin body to enable the environment in the bin body to meet experiment requirement. The experimental bin body is internally provided with an ultraviolet irradiation detector for detecting the intensity of the experiment light source. With the computer control of the experimental process, experimental data can be stored in a computer or experiment reports are printed through a printer. The invention has the advantages that the injury reaction of chemical substances to a human body exposed in ultraviolet irradiation is detected; the light intensity and irradiation time can be controlled, the interference of stray light is less, the experimental efficiency is high, the experimental environment is safe, and the experimental data is accurate.

The invention relates to a detection device for detecting at least one vital parameter of a person in a motor vehicle with a steering wheel (1). The detection device comprises a finger sensor device (2, 3) with an optical sensor device (8), the finger sensor device (2, 3) being arranged on the steering wheel (1) in the transition region between a steering wheel spoke (4) and the steering wheel body (5). In a preferred embodiment, the sensor surface area is formed by the actuation surface of a push-button switch. The push-button switch can, in particular, be a shifting paddle for a gearshift transmission. The sensor surface area can have an electrically conductive surface for generating an electrocardiogram (ECG).

The invention discloses a mist zone visibility detection method and mist zone visibility detection equipment. By measuring scattering strength of mist on light, an extinction coefficient is acquired and a visibility value is finally acquired. Laser is adopted as a detection light source, and a photoelectric detector is used for receiving the light. Mist with different visibility values brings different scattering receiving results; when the visibility is high, light scattering is low and an output value on the photoelectric detector is low; and when the mist visibility is low, a receiving value of the photoelectric detector is increased. By analyzing and calculating scattered light receiving data, the mist visibility value is acquired, and through multipoint arranged photoelectric receivers and the correction of environmental temperature and humidity, the measurement accuracy can be effectively improved. A wireless communication module is arranged inside an instrument, and remote signal transmission can be realized. The instrument is convenient to use, overcomes the defect that the conventional related products have high cost, and is convenient to monitor environment in foggy weather.

The invention discloses a light path system for photoelectric tracking active tomography illumination. The system comprises a transmitting telescope, a fast reflecting mirror, a plurality of Coude mirrors, a spectroscope, a transmitting laser, an illumination pulse laser, a short-wave optical imaging system, a TIR prism, a relay DLP chip imaging optical system, an illumination laser optical axis calibration optical system, an illumination laser beam shrinking system, an illumination laser collimating lens, a Coude optical path formed by the plurality of Coude mirrors and the like. The system has the advantages of being capable of detecting and imaging an ultra-long-distance target around the clock, reducing stray light interference, achieving detection and imaging of the target in a complex environment, reducing the size of the photoelectric tracking and pointing device and the like.

A laser device includes a transmitter that emits a light, a first reflector that pivotally reflects the light by a shaft, a light receiver provided apart from the transmitter in a first direction parallel to the shaft, a guide part that receives the light from the first reflector and changes a direction of the light in the first direction, and a second reflector that reflects a returning light from an object and pivots in sync with the first reflector.

The invention discloses a synchronous reflective distribution photometer, comprising two independent bases, wherein a first pivoted arm is connected with the first base to rotate around a first rotary central line, a first optical mirror is mounted on the first pivoted arm, a second optical mirror is connected with the second base or a second pivoted arm connected with the second base, the second pivoted arm can synchronously rotate coaxially with the first pivoted arm, an optical receiver is mounted on the pivoted arm, an object light source via a lamp arm is connected with the first base to rotate around itself shaft. The invention utilizes synchronous reflection and receiving, to effectively utilize the space of dark room, reduce measurement error, while the invention arranges optical receiver at different positions to select measuring arm length easily, which effectively resolve the defects of prior arm as large area of dark room, high measuring error, and hard range adjustment or the like.

The invention discloses an intelligent sensory tea quality evaluation method and system and belongs to the technical field of artificial intelligence and image recognition. The evaluation device is composed of a full spectrum LED area source, a high-definition camera, a color sensor, an objective table and an LCD touch screen. According to the intelligent sensory tea quality evaluation method andsystem disclosed by the invention, the artificial intelligence bionic device color sensor and the image recognition technology replace artificial sense organs for comprehensively identifying appearance quality of tea products from two aspects of dry tea, tea soup and bottom such as color and appearance. The system performs comparison calculation on acquired sample data and standard data in a database by a set algorithm, and a standard core corresponding to a central value of standard deviation can serve as a quality score of the sample. By utilizing forefront analysis and recognition technology design, many defect problems existing in the traditional artificial sensory evaluation are solved, and the intelligent sensory tea quality evaluation method is efficient and rapid in identificationprocess, high in result accuracy, clean, environmentally friendly, and material- and labor-saving and can provide guidance for the tea product identification process.

The invention discloses a facial image acquisition device for skin analysis. The device comprises a photomask, light sources, an imaging lens and a locator, wherein the photomask is symmetric about avertical plane and gradually narrows from the opening to the bottom; the imaging lens is arranged in the center of the bottom of the photomask and used for acquiring a facial image of a user; the light sources are arranged at the bottom of the photomask and symmetric about the imaging lens; the locator is arranged at the opening of the photomask and used for fixing the head of the user, so that points of the face of the user can fall in the focal plane of the imaging lens as many as possible. A proper imaging light path is designed by simulation of heads of Asian people, so that imaging conditions are almost consistent when facial images of users are shot each time, consistency of acquired images is improved during facial acquisition of different users or repeated facial acquisition of thesame user, and skin analysis of different groups or skin condition analysis of tracked unified users is facilitated.

The invention discloses a super-shallow detecting spectrum probe. The super-shallow detecting spectrum probe comprises an illumination optical fiber, a collection optical fiber, a coupling lens and a shell; the illumination optical fiber is used for leading the light emitted from a light source into the coupling lens to form an illumination spot on a to-be-detected object through the irradiation of the coupling lens; the light ray irradiated on the to-be-detected object is capable of entering into the collection optical fiber through the refraction of the coupling lens and can be guided to a check instrument through the collection optical fiber; the tail end surfaces of the collection optical fiber and the illumination optical fiber are polished as inclined planes, the inclined plane is used for enabling the light beam to deflect to an symmetry axis of the probe. By using the coupling lens and in matching with the bevel polishing of the end surfaces of the illumination optical fiber and the collection optical fiber, the superposed spots with high convergence, small diameter and large angle crossing are produced at the tail end of the spectrum probe through the illumination optical fiber and the collection optical fiber so as to obtain the short penetration depth. The pickup to the shallow signal is high in sensitivity and the interference from the deep signal is effectively avoided.

The invention provides a turntable type animal phototoxicity rapid test apparatus, which includes a light cabin and a rotating disc installed on a fixed platform equipped with a movable support assembly, and there are several springs on the rotating disc whose speed is controlled by a stepping motor The bracket can fix the tested rat cage with experimental animals. When the tested rat cage moves to the light cabin, it can automatically open and close the cabin entry valve and the cabin exit valve. The UV light source component in the light cabin emits 365nm light with a single wavelength The UVA light source is used to conduct phototoxicity irradiation experiments on experimental animals. Soft curtains are installed around the bottom of the light cabin to ensure the purity of UVA light source and the accuracy of light intensity during the experiment. In the experiment, a computer controller controls and records the process and results of various tests, etc. Parameters or output to the printer to print the experiment report. The beneficial effect of the invention is that the phototoxicity irradiation experiment of small animals can be quickly and automatically completed. It can automatically control the light intensity and irradiation time required by this type of test, the stray light interference is small, the experimental efficiency is improved, and the experimental data is accurate and reliable.

The invention discloses a test conversion clamp for a photoelectric device. The test conversion clamp comprises clamp pins, a lower bottom plate, a middle interface plate, a spring piece and an upper cover plate, the middle interface plate is fixedly installed on the lower bottom plate, the middle interface plate is provided with a groove used for installing a device to be tested, the spring piece is fixed at the bottom of the groove, one end of the clamp pin is connected with the spring piece, and the other end of the clamp pin extends to the outside of the lower bottom plate; one end of the upper cover plate is rotatably connected with the middle interface plate, a to-be-tested device is arranged in a groove formed in the middle interface plate, the upper cover plate presses the to-be-tested device, meanwhile, the leading-out end of the to-be-tested device presses the spring piece, the to-be-tested device is connected with the clamp pin through the spring piece, and the cover plate is provided with a light window corresponding to the to-be-tested device. Light emitted by the light source reaches the to-be-tested device through the light window. The switching clamp is simple in structure, rapid to install, convenient to disassemble, wide in applicability, capable of effectively improving the testing efficiency, high in stability and capable of effectively improving the testing yield.

The invention discloses a flow cytometer based on confocal light path design, and belongs to the technical field of life analysis scientific detection equipment. The flow cytometer comprises a liquid flow system, an optical system and a detection system, the liquid flow system comprises an injection pipeline and a sheath fluid pipeline which are respectively communicated with the quartz flow cell, the injection pipeline injects a cell sample into a central sheath fluid channel of the quartz flow cell, and the cell sample is wrapped and extruded by sheath fluid injected into the central sheath fluid channel of the quartz flow cell by the sheath fluid pipeline to form single cell flow; the optical system comprises an excitation light path and a fluorescence collection light path, a laser beam of the excitation light path is focused on a central sheath flow channel of the quartz flow cell and is used for exciting a cell sample in the central sheath flow channel of the quartz flow cell to generate fluorescence, and the fluorescence is collected through the fluorescence collection light path; the detection system comprises a photoelectric detector, a data acquisition card and an upper computer which are connected in sequence. The flow cytometer is compact in structure, simple and efficient in light path focusing and convenient to use.

The invention designs a miniature diffuse reflection spectral measurement system based on a smart phone, and belongs to the field of spectral analysis. According to the invention, a small-caliber concave spherical reflector is adopted to realize a collimation imaging system of a traditional micro spectrometer, a miniaturized structure and higher resolution are realized, and a light source, the spectrometer and data processing equipment are integrated into a portable system. The spectrograph is composed of an optical fiber, a slit, a concave spherical reflector and a diffraction grating, and a spectral image formed by the spectrograph is shot by the smart phone. The detection range of the spectrograph is 400 nm to 1100 nm, and the resolution of the central wavelength reaches 0.3 nm. Based on the system, a matched mobile phone APP comprises an image processing program and a spectral analysis program, and different mathematical models can be used for analyzing contents, concentrations and the like of different components. According to the invention, the defects of low resolution, narrow spectral range, multiple elements, large volume and the like of the existing mobile phone spectrometer technology are overcome, and the mobile phone spectrometer is a practical portable spectral analysis solution.