83results about How to "Reduce the effects of stray light" patented technology

The invention relates to a near-to-eye display type optical system based on a curved surface microlens array, wherein comprises a flexible OLED (organic light emitting diode) display element, and a microlens array manufactured on a curved surface, wherein the curved surface of the OLED and the curved surface of the microlens array are concentric spherical surfaces, the semi-diameter of the curved surface of the OLED is slightly greater, the positions of pixel units of the OLED on the spherical surface are corresponding to the positions of the microlens array one by one, the centers of the OLED and the microlens array are on the same semi-diameter after the assembling. By adopting the microlens array, the weight and the volume of an optical imaging part of the near-to-eye display optical system are obviously decreased, the whole system can be lightened and miniaturized; the microlens array closes to the OLED display unit, so that the light energy utilization rate is increased, the image brightness is increased and the influence of stray light is decreased.

The invention discloses an automatic light inspection machine foreign matter detection device, which includes more than one detection stations. Each detection station is equipped with a camera to provide a bright field light source assembly for bright field lighting and provide a dark field light source assembly for dark field lighting. The bright field light source assembly and the dark field light source assembly illuminate one to-be-detected bottle alternately, and the camera performs image acquisition on the to-be-detected bottle when the to-be-detected bottle is illuminated. The device provided by the invention has the characteristics of simple structure, low cost, high detection efficiency and accuracy, and can simultaneously realize bright field and dark field detection at one station.

The invention discloses a method for measuring the sight line stabilizing accuracy of a photoelectric sight-stabilizing system, and belongs to the technical field of optical measurement. The method is characterized by comprising the following steps that: a plane reflector is fixed on an inner ring frame of the photoelectric sight-stabilizing system to be measured, the photoelectric sight-stabilizing system to be measured is in a vibration state, a measuring laser beam is subjected to strength stabilization, spatial filtering and collimation and then irradiates the plane reflector, a complementary metal oxide semiconductor (CMOS) camera transmits a light spot image sequence of a reflected light beam imaged on a target surface to an image recording and processing system, and the image recording and processing system performs a series of processing on the light spot image sequence to obtain a light spot center-of-mass coordinate sequence, a stabilizing accuracy value sequence and stabilizing accuracy value sequence standard deviation, so that the stabilizing accuracy is measured. By the method, the high-accuracy measurement of the sight line stabilizing accuracy of the photoelectric sight-stabilizing system is realized; and the method can be popularized to the fields of measurement of the stabilizing accuracy of a gun control system and the like, and is wide in application prospect.

The invention discloses a wave aberration measuring device and a wave aberration measuring method of an optical system. The device comprises a linear polarization plane wave producing source, a 1/2 wave plate, a polarization splitting prism, a 1/4 wave plate, a reflection unit and an HS (Shack-Hartmann) wave-front sensor, wherein the linear polarization plane wave producing source is used for generating a linear polarization plane wave; the 1/2 wave plate is used for converting the linear polarization plane wave to be an s polarization plane wave; the polarization splitting prism is used for reflecting the s polarization plane wave transmitted by the 1/2 wave plate to be 1/4 wave plate, and transmitting p polarized light transmitted by the 1/4 wave plate, and converting a circular polarization plane wave of the reflecting device to be a p polarization plane wave; the reflecting device is used for returning a circular polarization plane of the 1/4 wave plate along the same route; and the HS wave-front sensor is used for measuring the wave aberration of the p polarized light entering the HS wave-front sensor. The wave aberration measuring device is capable of realizing the high-precision detection of various complicate optical systems.

The invention provides a micro spherical type short coherent point diffraction interference measurement system and method and belongs to the micro spherical type detection technical field. The micro spherical type short coherent point diffraction interference measurement system and method aims at solving the problems that the contrast ratio of the interference field of the existing short coherent point diffraction interference measurement method is poor and accordingly the measurement accuracy is affected. The micro spherical type short coherent point diffraction interference measurement system comprises a short coherent laser, a first half lambda wave plate, a rectangular reflecting mirror, a polarization splitting prism, a first pyramid prism, a first plane mirror, a second pyramid prism, a PZT (Piezoelectric Ceramic Transducer) phase shifter, a delay platform, a second half lambda wave plate, an optical fiber coupling mirror, a single-mode polarization-maintaining optical fiber, a convergent lens, a pinhole lens, a first collimating lens, a quarter lambda wave plate, a micro-objective, a second plane mirror, a second collimating lens, a polaroid, an area array CCD (Charge Coupled Device) and a computer. According to the micro spherical type short coherent point diffraction interference measurement method, an optical path structure that the quarter lambda wave plate is combined with the polaroid is adopted to select beams in the interference field and accordingly direct current components in the beams are reduced, the contrast ratio of interference fringes is improved, and the adjustable optimization of the contrast ratio is implemented. The micro spherical type short coherent point diffraction interference measurement system and method is applied to the micro spherical type detection.

A intelligent synthesized measuring apparatus for half wave voltage of extinction ratio in crystal, and phase delay of wave plate which is featured as setting a spectroscope in 45 degree to forward direction of light beam, setting polarizer, article to be tested, analyzer, the first photoelectric detector, the first demodulation and amplification circuit as well as the first A/D converter, a signal line connection computer of the first A/D converter in sequence at transmission direction of the spectroscope, the first output of the computer is rotated around optical axis by a first step motor driving analyzer, the second output of the computer is rotated around optical axis by a second step motor driving article to be tested; and an attenuator, the second photoelectric detector, the second demodulation and amplification circuit as well as the second A/D converter, a signal line connection computer of the second A/D converter in sequence at reflection direction of the spectroscope. The invention can not only complete integration measurement of a plurality of parameters, but also has characters of high measurement accuracy, good reliability, and convenient operation.

The invention discloses an all-fiber laser radar aerosol detecting device. The all-fiber laser radar aerosol detecting device comprises a signal emitting channel, a signal receiving channel and a signal processing channel, wherein the signal emitting channel is used for emitting a laser signal, the signal receiving channel is used for receiving the emitted laser signal and an echo signal produced by the part, emitted to the atmosphere, of the laser signal, the signal processing channel is used for converting the echo signal into an electric signal for performing analyzing, and the signal emitting channel, the signal receiving channel and the signal processing channel are all of an all-fiber structure. The all-fiber laser radar aerosol detecting device has the advantages of continuous high repetition frequency, high sensitivity and the like, the adopted all-fiber structure can detect signals with the picowatt magnitude reaching to 20 kHz, a very high temporal-spatial resolution is achieved, and the whole system is small in size and high in stability.

The invention relates to a nano spectral analysis and electrochemical analysis technique, and relates to a dark-field nano spectral electrochemical detection pool for plasma observation. The detection pool comprises a quartz glass plate, a circular electrode and a bearing plate which are all transparent structures, wherein a circular electrode fixing pool, a channel, a flowing injection port and an outflow port on the channel, a reference electrode fixing port, a counter electrode fixing port, a deoxygenization space, an inert gas feeding port, a gas extraction port and an electrode lead connection channel are arranged on the quartz glass plate; and the quartz glass plate and the bearing plate are formed into a sandwich layer, the circular electrode is fastened in the electrode fixing pool, and the quartz glass plate and the bearing plate are hermetically fixed by using screws. According to the invention, a light path is easy to calibrate, an operation of deoxygenization is convenient, and a working electrode is easy to install, remove and replace; and the detection pool has spatial discrimination and micro-area analysis capabilities, so that the detection pool can be used as a technique for carrying out observation and acquisition on resonance Rayleigh scattered spectrums of plasmas generated by single nanoparticles and generated by that single nanoparticles and molecules of an interface solution are interacted under the condition of electrochemical control.

The invention discloses a method for adaptively determining the optimal polarization orientation in a polarization vision system. The method comprises the following steps of: compositing polarization images in any polarization orientation by means of any three polarization images in the known polarization orientation; and evaluating the definition of the polarization images so as to determine the optimal polarization orientation for the polarization vision system. The invention provides the inexpensive, objective and convenient method, so that the problem that the orientation of a polarizer in the conventional polarization vision system is difficult to determine is solved; and after the optimal polarization orientation is determined, the influence of stray light can be eliminated to the greatest extent, and the imaging quality is greatly improved.

The invention discloses a method for detecting the diopter of a rigid endoscope based on a liquid lens. A mechanical movement device in a detection device is an electric control device, human intervention is reduced, the measurement precision is improved, and the automation degree is high. CCD imaging and computer display are adopted, the human eyes are replaced, direct observation is carried out through the endoscope, observation fatigue is avoided, and the operation is convenient. The focal length of a liquid zoom lens is changed through changing voltage of a liquid zoom lens so as to replace a focusing lens group, the diopter of the rigid endoscope is enabled to be only related with the voltage of the liquid zoom lens, the operation is simple, the precision is high, and measurement errors are reduced. Influences of stray light are eliminated through carrying a test in a darkroom or adopting a light barrier, so that the detection result is enabled to be more accurate.

The invention discloses a spectral measurement system and a measurement method. The system comprises a micro spectrometer for acquiring spectrum of a sample to be measured through an acquiring light path and performing filtering and light splitting through a filter, a standard reflecting plate for reflecting visible light spectrum energy to obtain initial spectrum information, and a mobile terminal which is provided with an LED lamp and a camera and is used for lighting the sample to be measured, obtaining the initial reference spectrum intensity, acquiring dark noise strength of a camera and the spectrum intensity of the sample to be measured, and then obtaining the spectrum reflectivity of the sample to be measured according to the initial reference spectrum intensity, the dark noise strength, and the spectrum intensity of the sample to be measured. With the adoption of the system, the spectrum data with the same standard can be acquired under any different acquiring environments, so that the measuring adaptability is improved, and moreover, the spectrum data accuracy and stability can be effectively ensured.

The invention provides an accurate measurement method for the signal-to-noise ratio of a fiber optic spectrometer. The method includes the following steps that first, related devices are connected; second, measurement on the signal-to-noise ratio of the fiber optic spectrometer under different light intensities is achieved; third, the specific value between a correction average value mu of a signal corresponding to the ith exposure pixel of an array photoelectric detector and a jittering value sigma of a signal deflection average value is calculated through N times of signal acquisition and measurement. By the adoption of the scheme, the method can adapt to the measurement requirement of the signal-to-noise ratio of the fiber optic spectrometer, not only can influences of stray light be decreased or reduced, but also the intensity of incident light of the fiber optic spectrometer can be conveniently and fast changed through a variable optical attenuator, and accurate measurement on the signal-to-noise ratio of the fiber optic spectrometer under different light intensities is achieved.