26 results about "Refraction angle" patented technology

The invention discloses a fish growth state monitoring method and system based on underwater image recognition, and relates to the technical field of fish growth state monitoring, and the method comprises the following steps: setting a temperature sensing region around the optical axis direction of a camera device, and carrying out the real-time collection of the temperature change of a local water body in an underwater environment, acquiring temperature gradient data corresponding to the light propagation path, and generating temperature layered mapping according to the temperature gradient data; and on the basis of temperature hierarchical mapping, constructing a refraction track sequence on the light propagation path, and adjusting the refraction angle weight according to the temperature difference of each hierarchical region to form the light propagation path. According to the invention, through combination of temperature sensing and light field compensation, continuous tracking and space geometry reconstruction of a light propagation path are realized, and the image contour is kept clear and stable. Based on the dynamic smoothing processing of a time sequence stable chain and a form balance area, the fish body form is kept uniform in time and space, false growth transition is avoided, and the stability and accuracy of a monitoring result are improved.

The application provides a spacecraft autonomous navigation method and electronic equipment. The spacecraft autonomous navigation method comprises the following steps: determining technical indexes of an optical sensor according to navigation requirements, and determining a configuration of the optical sensor according to orbit information of the spacecraft; collecting a star map by using the optical sensor with the determined technical indexes and configuration, processing the star map, identifying a refraction star and extracting a refraction angle; and using a Kalman filtering algorithm to perform information fusion on information output by an inertial navigation system and a refraction apparent height calculated based on the refraction angle, so as to correct navigation errors and obtain corrected navigation information. The application corrects drift errors of the inertial navigation by astronomical navigation, maintains continuous navigation information by using the inertial navigation when the astronomical system is unavailable, and achieves the purpose of improving navigation accuracy.

The invention relates to the field of optical measurement, and discloses a method, system and related equipment for measuring liquid level height and liquid film thickness, and the method comprises the following steps: after a laser emitter emits at least two laser beams with different incident angles to the liquid level in a reagent bottle, obtaining the incident angle of each laser beam; based on the incident angle, determining an internal refraction angle after each laser beam irradiates the liquid film; obtaining the transverse offset of each laser beam; wherein the transverse offset is the offset between the laser emission position and the position of the preset observation point after the laser is refracted by the liquid in the reagent bottle; and calculating the height of the liquid level and the thickness of the liquid film based on each transverse offset and each internal refraction angle. Through multi-angle laser incidence and refraction change among air, the liquid film and the liquid, calculation of the liquid level height and the liquid film thickness is achieved, and the technical effects of being rapid, accurate, free of contact and capable of achieving real-time measurement are achieved.

The application provides an optical waveguide and an electronic device. The optical waveguide comprises a waveguide substrate, and a coupling-in region and a coupling-out region are arranged on the side surface of the waveguide substrate. The coupling-in region is used for coupling light into the waveguide substrate, and the light is coupled out from the coupling-out region after reflection propagation inside the waveguide substrate. One of the coupling-in region and the coupling-out region is a positive dispersion region, and the other is a negative dispersion region. The dispersion generated after the light passes through the positive dispersion region is used for compensating the dispersion generated after the light passes through the negative dispersion region. The processing effects of the positive dispersion region and the negative dispersion region on light of different wavelengths can be mutually compensated, so that light of different wavelengths incident at the same incident angle can be emitted at a similar refraction angle. In this way, the light of different wavelengths can have a similar diffraction order when being coupled out, the energy of the light of different wavelengths coupled out is similar, and thus the picture effect of the electronic device is improved.

A device for evaluating the cross-sectional shape of a welded portion according to the present invention comprises: a transmission / reception unit that focuses ultrasonic waves near a welded portion by using a contact medium, transmits ultrasonic waves having a plurality of refraction angles at an angle inclined with respect to the thickness direction of a metal material by using a contact medium, and receives reflected ultrasonic waves for each of the plurality of refraction angles by using a contact medium; a signal processing unit that performs amplification processing and filter processing on the reflected waves having each of the plurality of refraction angles, then uses the amplification-processed and filter-processed reflected waves to extract echo amplitudes within a detection gate for each of the plurality of refraction angles, generates an image showing the distribution of the echo amplitudes within the detection gate for each ultrasonic wave refraction angle, and generates an echo amplitude map obtained by synthesizing each image by using the refraction angle corresponding thereto; and an output unit that outputs the echo amplitude map.

The utility model discloses a refraction angle tester for an optical fiber array. The refraction angle tester comprises a supporting base, a laser emitting assembly and an optical fiber array fixing assembly which are arranged on the supporting base, and an angle identification table placed outside the supporting base, through the laser emitting assembly and the optical fiber array fixing assembly, when the optical fiber array to be processed needs to be detected, whether the optical fiber array meets the production standard or not can be preliminarily judged by observing the scale position of the laser reflected by the optical fiber array on the angle identification table, and if flaws exist in the optical fiber array, the optical fiber array can be accurately detected. Compared with tedious detection steps in the prior art, only the relative positions of the laser emitting assembly, the optical fiber array fixing assembly and the angle marking table need to be adjusted to correct positions, and then the laser emitting assembly, the optical fiber array fixing assembly and the angle marking table are adjusted to correct positions. After the optical fiber array is installed on the clamping part and the laser emitting device is turned on, whether the optical fiber array has flaws or not can be preliminarily judged, and operation is easy, convenient and efficient.

The present invention provides a means to increase the refraction angle of ultrasound on the inner surface of a pipe carrying cryogenic fluid compared to conventional methods, and to reduce ultrasound waves other than the central wave entering the cryogenic fluid, thereby improving the accuracy of detecting the propagation time of ultrasound. [Solution] The wedge 20 has a first surface 21, a second surface 22, and a third surface 23 that are perpendicular to the central plane 4 containing the central axis Z. The first surface is located parallel to the central axis and has a reference point A to which the transverse wave center wave TC is incident. The second surface has a reflection point B that converts the longitudinal wave center wave PC into a transverse wave center wave TC and reflects it. The third surface has a longitudinal wave transmission point C to which the ultrasonic transducer 12 is attached and which emits the longitudinal wave center wave PC. The incident angle θ1 of the reference point A is set to be between 65° and 75°, and the incident angle θ3 of the reflection point B is set to be between 65° and 75°. In addition, the contact medium 30 is located in an usable angle range α of 5° to 10° with respect to the incident angle θ1.

The application discloses a light guide column and a cylindrical light guide column side wall structure adjusting method and device, wherein the method comprises the following steps: obtaining the size parameters of the light guide column; calculating the total reflection angle of the light guide column according to the refractive index of the light guide column and the refractive index of air based on the refraction law; and calculating the refraction angle of the refracted light according to the incident angle of the incident light; when the complementary angle of the refraction angle is less than the total reflection angle, obtaining the first inclination angle range of the side wall of the light guide column according to the refraction angle and the total reflection angle; calculating the position of the edge light of the light guide column first incident to the side wall of the light guide column after being refracted by the light inlet surface based on the refraction angle and the diameter of the light inlet surface, and marking the position as the first position; and adjusting the side wall of the light guide column according to the first inclination angle range from the direction of the first position to the bottom surface of the light guide column to form a first inclined surface, so that the refracted light is totally reflected on the first inclined surface. Therefore, the refracted light can still be totally reflected on the side wall, the light energy loss is reduced, and the light guide efficiency is improved.

The application provides an optical structure, comprising two optical windows spaced from each other, and an air film formed between the two optical windows; the optical structure can convert an incident Gaussian beam into a flat-top beam; wherein the optical structure satisfies the following relationship: T*F*k*d*sinθ i =n0sinθ t ; wherein T is the transmittance of the air film, F is the Fresnel coefficient, k is the wave number, δ is the phase difference generated after the Gaussian beam is alternately reflected once in the air film, R is the reflectivity of the interfaces between the air film and the two optical windows, d is the thickness of the air film, n0 is the refractive index of the air film, θ t is the refraction angle of the Gaussian beam in the air film, n is the refractive index of the optical window, and θ i is the incident angle of the Gaussian beam when the Gaussian beam is incident from the optical window into the air film. The application also provides an exposure device.

The invention relates to the technical field of optical spectrum instrument design, in particular to an infrared light refractive index and transmissivity testing system and method for infrared optical glass, and the system comprises an infrared light source unit, a monochromator unit, a precise angle measuring unit, a general control unit and an upper computer data processing system. Incident light is divided into sample light and reference light through the double-beam light splitting module, the refraction angle and the light intensity of light beams penetrating through a sample are automatically tracked and measured by utilizing the self-positioning aiming mobile table, and meanwhile, an optical path compensation module and a full-automatic temperature control system are combined, so that the aim of measuring the light intensity of the sample within a set broadband and temperature range is achieved. And the refractive index, the reflectivity and the transmissivity parameters of a prism or window sample are subjected to integrated and high-precision synchronous measurement. The technical problems that in the prior art, multiple instruments are relied on, the operation process is complex, efficiency is low, and accurate measurement is difficult to conduct under the variable temperature condition are effectively solved.

A method and apparatus for evaluating the cross-sectional shape of a weld that can evaluate the cross-sectional shape of a weld metal nondestructively and with high accuracy. [Solution] The device for evaluating the cross-sectional shape of a weld according to the present invention comprises a transmitter / receiver unit that focuses ultrasonic waves near the weld via a coupling medium, transmits ultrasonic waves at multiple refraction angles via the coupling medium at angles inclined relative to the thickness direction of the metal material, and receives reflected waves of the ultrasonic waves via the coupling medium for each of the multiple refraction angles of the ultrasonic waves; a signal processor that amplifies and filters the reflected waves for each of the multiple refraction angles, and then uses the reflected waves after amplification and filtering to extract echo heights within a detection gate for each of the multiple refraction angles, generates an image showing the distribution of echo heights within the detection gate for each refraction angle of the ultrasonic waves, and generates an echo height map by combining the images at the corresponding refraction angles; and an output unit that outputs the echo height map.

A control system for construction machinery includes an upper camera installed in a driver cabin of a rear body to capture a front view of the driver cabin, a lower camera installed in a front body rotatably connected to the rear body to capture a front view of the front body, a steering angle determiner configured to recognize a shape of the front body in the first image captured from the upper camera and to determine a refraction angle of the front body, an image processor configured to synthesize the first and second images into one synthesized image, and to set a position of a transparency processing area in which at least one of the first and second images is transparency-processed in the synthesized image according to the refraction angle of the front body, and a display device configured to display the synthesized image transparency-processed by the image processing device.

The utility model relates to the technical field of concentration meters, and particularly discloses an on-line concentration meter, which comprises an on-line concentration meter body, a plug arranged on the circumferential surface of the on-line concentration meter body, eight interfaces of the plug, and a reflection structure arranged on the circumferential surface of the on-line concentration meter body, the reflection structure comprises a prism, the prism is made of sapphire materials, the prism is arranged below the plug, and the plug is arranged below the prism. The reflection structure further comprises an LED light source, a light path optical fiber and a CCD array, by arranging the reflection structure, the instrument firstly changes the refraction angle in soluble liquid, the corresponding refractive index also changes, the refractive index and the concentration temperature rule are as follows: the refractive index is increased, the concentration is increased, the temperature is increased when the concentration is not changed, and the refractive index is reduced; therefore, the refractive index can directly reflect the concentration change, the temperature fluctuation influences the refractive index and the concentration, the sample concentration can be continuously detected, linkage control with a PLC and an upper computer can be realized by arranging a plug, the hysteresis quality between offline monitoring data is reduced, and the practicability is improved.

The present invention relates to an electronic laser scanning device capable of electronically scanning a subject without a mechanical driving unit. The present invention relates to technology capable of precisely scanning a subject without a mechanical driving unit by precisely adjusting the polarization and reflection and refraction angles of a laser signal by using an electronic transmission / reception optical modulator and a scan lens.

The application relates to a phased array ultrasonic wedge parameter calibration method, which comprises the following steps: setting a workpiece sound velocity as a standard test block sound velocity, setting initial parameters of a wedge, setting a sector scanning strategy; once or multiple times selecting a waveform display angle to determine a selected refraction angle, using a plurality of test blocks with different depth horizontal hole reflectors to obtain different sound paths in a workpiece; and / or measuring a horizontal distance from a probe front to a horizontal hole; and determining a sound velocity of the wedge and / or a size of the wedge according to the standard test block sound velocity, the initial parameters of the wedge and / or the horizontal distance. The application can calibrate a wedge parameter model by using limited times of independent positioning measurement data, so as to achieve the goal of calibrating all detection data.

The invention discloses a support insulator ceramic member internal crack ultrasonic end corner reflection wave detection positioning method comprising the following steps: S1, using an ultrasonic flaw detector, using an ultrasonic emission probe to obliquely emit an incident longitudinal wave to the ceramic member arc surface, and generating an inclined refraction transverse wave in a ceramic test piece, receiving an end corner reflection echo reflected by the internal crack of the ceramic piece by an ultrasonic transmitting probe so as to measure the sound path distance of the crack defect in the ceramic test piece; and S2, calculating to obtain the depth from the surface and the distance in the circumferential direction by using the inclined incidence angle of the refracted transverse wave, the sound path distance and the structural size of the ceramic piece, and carrying out crack defect positioning. According to the method, low-speed propagation of transverse waves is utilized, a small-size ultrasonic transceiving wafer with the size smaller than 4 mm is preferably selected, a near-field blind area is controlled within 5 mm, and high signal-to-noise ratio detection is achieved. Meanwhile, the intensity of ultrasonic signals reaching the crack end angle surface is enhanced by utilizing a large refraction angle, so that the intensity of reflection echoes is enhanced, and the detection sensitivity is improved.

The invention relates to a vehicle component for a vehicle, the vehicle component comprising: - a radar sensor configured to emit radar waves in a range of wavelengths; and - a layer arrangement arranged opposite the radar sensor, the layer arrangement comprising a first subset of layers and a second subset of layers, the first subset of layers being configured to perform an optical function, each layer having a refractive index and a thickness, the second subset of layers being configured to provide protection for the first subset of layers, each layer having a refractive index and a thickness; - the vehicle component being characterized in that the total thickness of the second subset of layers is dimensioned such that the total thickness of the layer arrangement is equal to m times the wavelength of the range, divided by the product of twice the equivalent refractive index of the first subset of layers and the second subset of layers and the cosine of the refractive angle corresponding to the angle of incidence of the radar waves, wherein m is an integer.

This utility model relates to the technical field of polarized wall washer lenses, and discloses a light-mixing polarized wall washer lens, including a lens body. The lens body includes a freeform surface, a polarizing region, a reflective surface, a first polarizing surface, a second polarizing surface, and a refractive surface. The reflective surface is used to reflect light to the polarizing region, and the refractive surface is used to refract light to the polarizing region or the freeform surface. The first and second polarizing surfaces are respectively used to refract light to the freeform surface, and the refraction angles of the first and second polarizing surfaces are not aligned. The polarizing region and the freeform surface are respectively used to converge light and project it outward to form a light spot. With the combined effect of the polarizing region and the freeform surface, it has a greater light output effect and helps to increase the light output distance, meeting the needs of wall washer lights. Furthermore, under the action of the first and second polarizing surfaces, the light mixing effect is enhanced, thereby improving the presentation effect of the light spot.

Methods for controlling a biological manufacturing system include directing a light beam to pass through a wall of a vessel containing a first fluid generated by the biological manufacturing system, measuring an angle of refraction of the light beam in the first fluid, the angle of refraction corresponding to an angle between a propagation direction of the light beam in the first fluid and a normal to an interface between the vessel wall and the first fluid, determining information about the first fluid based on the measured angle of refraction, and adjusting a parameter of the biological manufacturing system based on the information about the first fluid.

A beamforming device in a wireless communication system is provided that includes a phased array antenna, at least one wireless communication circuit, and a lens, wherein the lens comprises a first surface oriented in a first direction, which is the direction toward the phased array antenna, and a second surface oriented in a second direction, which is the opposite direction of the first direction, and a first beam radiated from the phased array antenna is refracted after passing through a first point on the first surface, and forms a first path inside the lens and forms a second path along which the first beam is refracted at a second point on the second surface after passing through the inside of the lens along the first path, wherein the refraction angle at the second point may be formed so as to be dependent on the radiation angle of the first beam.

The embodiment of the present application provides a kind of weld automatic detection method, detection equipment, storage medium and program product, it is related to ultrasonic testing technical field, the method comprises: determining the refraction angle and the scanning distance corresponding to each probe;When trolley uniform velocity runs, control probe reciprocates in the first direction according to corresponding scanning distance, and control probe emits ultrasonic wave according to corresponding refraction angle, wherein, trolley in running process, wherein shaft position coincides with the extension direction of the weld to be measured, the extension direction of the weld to be measured is perpendicular to the first direction;Corresponding echo signal of each probe is received, and first detection image is generated according to echo signal;Whether the weld to be measured exists defect is detected based on first detection image.The present application can realize the automation control of weld detection process, improve detection efficiency and defect identification precision.

The application discloses a photoelectric device packaging method and device, computer equipment and storage medium, which is suitable for short-wave infrared detector or sensor packaging scene. The application improves the light transmission efficiency and stability in the multi-layer optical structure by simulating and optimizing the light path in the packaging process. On the one hand, ray tracing and dynamic optimization of geometric structure parameters are used to improve the light propagation path and reduce energy loss caused by refraction angle deviation. On the other hand, by identifying the key points of energy loss and combining interface matching deviation analysis, the material layer thickness and refractive index combination are iteratively optimized to reduce interface reflection and absorption loss and improve transmission efficiency. The application significantly enhances the effective signal acquisition capability of the short-wave infrared device, which can improve its performance in high-precision application scenarios such as industrial detection, medical imaging and environmental monitoring, thereby promoting the engineering and practical development of short-wave infrared devices.

The embodiment of the present application discloses a wide-angle camera lens. The wide-angle camera lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence along an optical axis from an object plane to an image plane; the first lens has positive refractive power, the second lens has positive refractive power, the third lens has negative refractive power, the fourth lens has negative refractive power, the fifth lens has positive refractive power, and the sixth lens has positive refractive power. The embodiment of the present application is configured or approximately configured as a traditional double-Gaussian symmetric optical system, so that the light ray trend and the refraction angle of the object side and the image side space are symmetrical, and the refractive power of the front and rear symmetrical lenses is matched, and the reasonable air gap adjustment of different lens pieces and the optimization of the lens aperture are matched, which helps to effectively correct the aberration, realize small distortion, small chromatic aberration and low field curvature, and helps to compress the front and rear lengths of the whole lens and reduce the volume of the whole lens.

The application provides a laser spot welding device for hardware mold processing, and relates to the technical field of laser spot welding devices.The device comprises a supporting frame, a moving mechanism is arranged on the supporting frame, a laser main body is arranged on the moving end of the moving mechanism, a laser spotlight is arranged inside along the laser emission direction, a protective mirror is arranged inside, a limiting groove is arranged on the inner side wall, and a refraction assembly is arranged corresponding to the exit end of the laser spotlight.The application is supported by the supporting frame, the moving mechanism drives the laser main body to adjust the processing distance, the mold does not need to be frequently adjusted, the protective mirror filters stray light, the spot welding precision is ensured, the refraction assembly reflects and diffuses the light spot to the focusing assembly, the angle can be adjusted to improve the energy utilization rate, the liquid convex lens is high-temperature-resistant and can accurately adjust the focal length, the built-in limiting sleeve cooperates with the sliding sleeve to prevent abrasion and stabilize the transmission, the driving part synchronously adjusts the focusing and refraction angles, and can also finely adjust the radial direction, the degree of automation is high, the efficiency is high, the whole device realizes accurate focusing, and the high-precision spot welding requirement of the hardware mold is met.

The invention discloses a thoracoscope-assisted accurate pulmonary nodule resection intelligent navigation method, and relates to the technical field of medical imaging and surgical navigation, and the method comprises the following steps: S001, before preoperative flushing, scanning a lung cavity bottom area through a low-angle light path, recording the positions of a reflection peak line and a dark inclined plane, and determining the position of the reflection peak line and the position of the dark inclined plane; a continuous fluid wave surface boundary zone is formed according to the light intensity change and is used for identifying a light propagation refraction change area; and S002, based on the fluid wave surface boundary band, analyzing the inclination angle change of the incident light point by point, extracting a section in which the refraction angle of the light suddenly changes, constructing a refraction jump corridor, and sequentially generating a refraction turning point sequence to establish a light path space positioning anchor point set. By constructing the refraction jump corridor and the static water tank and combining optical structure control and respiration driving adjustment, a light path stably penetrates through the liquid level, navigation coordinates are synchronously updated, the surgical image definition and positioning precision are improved, mistaken cutting is effectively prevented, and the pulmonary nodule resection safety and efficiency are improved.

The invention discloses a bolt flaw detection method and ultrasonic flaw detection equipment. The method comprises the following steps: S1, enabling a first probe to move between a first detection point and a second detection point and emit ultrasonic waves towards an edge surface; s2, obtaining a first detection range based on the distance between the first detection point and the edge surface, the distance between the second detection point and the edge surface and the refraction angle of the first probe; s3, enabling the second probe to move between the first detection point and the second detection point and to emit ultrasonic waves towards the edge surface; s4, obtaining a second detection range based on the distance between the first detection point and the edge surface, the distance between the second detection point and the edge surface and the refraction angle of the second probe; s5, confirming that the second detection range is partially overlapped with the first detection range; and S6, repeating the steps S1 to S5 until the plurality of detection ranges cover the to-be-detected area of the bolt. According to the bolt flaw detection method, full-coverage detection can be guaranteed.