13 results about "Aperture plane" patented technology

According to one embodiment, an optical test apparatus includes a first aperture, a second aperture, an image sensor, and a first lens. The first aperture includes a first aperture plane provided with a first wavelength selecting region. The second aperture includes a second aperture plane provided with a second wavelength selecting region different from the first wavelength selecting region. The image sensor is configured to image a light beam passing through the first aperture plane and the second aperture plane and reaching an imaging plane. The first lens is configured to make a light beam passing through the first aperture plane and the second aperture plane be incident on the imaging plane.

The invention discloses a Ritchey-Commann surface shape detection method and system based on two-angle Power iterative fitting. Belongs to the technical field of optical detection and particularly relates to the technical field of large-aperture plane mirror surface shape error detection. The objective of the invention is to efficiently process detection data of Ritchey, Common and Miwn angles and calculate an accurate and reliable real surface shape of a plane mirror. Under the condition that the defocusing error amount is unknown, the optimal Power coefficient is calculated automatically and iteratively, the detection operation process is effectively simplified, the dependence of data processing on accurate measurement of the length value of the system is reduced, and meanwhile, the precision of plane mirror surface shape recovery solution is ensured.

Embodiments of the present application relate to the technical field of antennas, and provide an antenna, a communication module, an electronic device, and an antenna design method and apparatus, for use in mitigating the problems of high structural complexity and low aperture utilization of shared-aperture antennas. The antenna comprises: at least two antenna units and a metasurface. All the antenna units operate within a same aperture plane. The operating frequency bands of at least two antenna units among all the antenna units are different. In addition, the beam transceiving directions of all the antenna units are oriented toward the metasurface.

The application discloses a method for scanning and calibrating a focal plane of a large-aperture objective lens by using a small-aperture light beam, and aims at solving the problems of high economic cost, inconvenient operation and small application range in the focal plane calibration process of a large-aperture objective lens used in a field or a large-aperture objective lens used on line in the prior art. In the application, a small-aperture parallel light source is driven by a reflecting mirror to scan a large-aperture objective lens to be measured, and the position of a detector is determined according to the state of a light spot on the detector, so that the focal plane of the objective lens to be measured is determined. Compared with the method for directly measuring the focal plane of a large-aperture objective lens to be measured by using a large-aperture parallel light pipe and a large-aperture plane mirror in the prior art, the method provided by the application is more economical, portable and convenient to operate, and has a wide application range and can be applied to the focal plane calibration of large-aperture objective lenses in various environments.

The present application relates to the technical field of surface detection, in particular to a surface detection method and system for a large-aperture plane mirror in a vacuum environment, the method comprising constructing a full-aperture spatial discrete mapping model, layering full-aperture surface parameters according to spatial frequency, extracting common modal parameters corresponding to low-frequency surface components in each sub-aperture measurement result, explicitly introducing the common modal parameters into a stitching equation as a global constraint term, and constructing a stitching matrix; and performing block reconstruction processing on the stitching matrix. The present application effectively solves the problem of insufficient surface stitching stability under the condition of reducing the sub-aperture overlap ratio without relying on a super-large-aperture interferometer and without interrupting the existing detection system of the Ritchey-Corman method, realizes the consideration of detection efficiency and surface reconstruction accuracy, and has significant engineering practical value and promotional significance.

The invention provides a cementing device and method for a large-caliber plane optical flat, and belongs to the technical field of optical precision machinery. The adhesive binding device for the large-caliber plane optical flat comprises an annular mirror frame, the inner diameter of the mirror frame is larger than the radial outer diameter of the plane optical flat to be detected, the plane optical flat is sleeved with the mirror frame, the mirror frame and the plane optical flat are located on the same plane and share the same circle center, and a gap between the mirror frame and the plane optical flat is filled with glue; the number of the supporting assemblies is at least three, the supporting assemblies are evenly distributed around the mirror frame by a circle, the supporting assemblies penetrate through the wall face of the mirror frame in the radial direction of the mirror frame and abut against the radial periphery of the plane optical flat, and the multiple supporting assemblies are matched together to clamp and fix the plane optical flat. According to the invention, the large-aperture optical flat and the mirror frame are adhered and fixed by using an adhering method, so that the influence of gravity on the plane surface shape is reduced; through the supporting assembly penetrating through the lens frame and abutting against the optical flat, self-shaking caused by suspension of the optical flat is avoided, fixed assembly of the large-diameter optical flat is achieved, and follow-up surface shape measurement is facilitated.

This invention relates to the field of surface profile inspection technology, and particularly to a method and system for inspecting the surface profile of large-aperture plane mirrors under vacuum conditions. The method includes constructing a full-aperture spatial discrete mapping model, representing the full-aperture surface profile parameters hierarchically according to spatial frequencies, extracting common modal parameters corresponding to low-frequency surface profile components from the measurement results of each sub-aperture, and explicitly introducing these common modal parameters into the splicing equation as global constraint terms to construct a splicing matrix; and performing block reconstruction processing on the splicing matrix. This invention effectively solves the problem of insufficient surface profile splicing stability under reduced sub-aperture overlap ratios without relying on ultra-large aperture interferometers or interrupting the existing Richter-Comman method inspection system, achieving a balance between inspection efficiency and surface profile reconstruction accuracy. It has significant engineering practical value and promotional significance.

The present invention provides a method for inspecting an object placed in a turbid fluid, the method comprising the steps of: A) generating electromagnetic radiation by a radiation source; B) emitting the electromagnetic radiation; C) modulating the amplitude or frequency of the electromagnetic radiation; D) illuminating a surface of the object at a plurality of object points with the modulated electromagnetic radiation, the illumination of the object surface occurring along an illumination beam axis; and E) focusing the electromagnetic radiation reflected from the object points toward a light receiving portion of a detector by an optical system having a focal length, the detector having an aperture having an aperture shape in an aperture plane, the aperture plane being separated from the light receiving portion by a detector distance and the aperture plane being separated from the optical system by an aperture distance, the focusing occurring along the detection beam axis. and F) detecting electromagnetic radiation reflected from the surface of the object with the receiver; and for each of the plurality of object points, G) measuring an indication of a propagation time of the electromagnetic radiation from a reference point in a beam path of the electromagnetic radiation to each object point; and H) outputting the indication of the propagation time, wherein the illumination beam axis and the detection beam axis form a parallax angle, the aperture has an aperture position in a direction perpendicular to at least the illumination beam axis or the aperture beam axis, and the surface of the object is spaced a measurement distance from the receiver.

The embodiment of the invention provides an antenna, a communication module, electronic equipment and an antenna design method and device, relates to the technical field of antennas, and aims to solve the problems of high structural complexity and low aperture utilization rate of a common-aperture antenna. The antenna comprises at least two antenna units and a metasurface. All the antenna units work in the same aperture plane. And the working frequency bands of at least two antenna units in all the antenna units are different. And the wave beam transmitting and receiving directions of all the antenna units face the metasurface.

The invention discloses a wide-field-of-view high-resolution full-transmission visible light remote sensing optical system, relates to the technical field of optical systems, and solves the problems that an existing off-axis system introduces asymmetric aberration and is complex to process, install and adjust, a refraction system faces a chromatic aberration correction problem and is often huge in size, and a multi-camera splicing scheme increases system complexity and calibration difficulty and the like. Comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged on the same optical axis in the optical axis direction, and the optical system further comprises a diaphragm face located in front of the first lens. The first lens, the second lens, the third lens, the fourth lens and the eighth lens are positive lenses, the fifth lens, the sixth lens, the seventh lens and the ninth lens are negative lenses, and a detector is arranged behind the ninth lens. The system is simple in structure, the total length of the system is extremely compressed, the cost and the space can be remarkably saved, the spectrum band ranges from 400 m to 750 nm, and the system can be used for splicing a wide-spectrum-band detector.

The invention discloses a multifunctional scanner light source module, and belongs to the technical field of optical illumination. The objective of the invention is to solve the technical problems of complex structure, low integration level and difficulty in function extension when the existing scanner light source is switched between multiple multiplying powers and multiple modes. According to the technical scheme, the module is characterized by comprising a high-color-rendering light source, an illumination optical system, an aperture switching mechanism, a function switching mechanism and a driving mechanism. And the aperture switching mechanism is arranged at the aperture plane, comprises a plurality of diaphragms with different apertures, and can be moved through the driving mechanism to be matched with the apertures with different numerical values. And the function switching mechanism is arranged in the light path, comprises at least one bright field station and a shielding station in a fluorescence mode, and can be moved through the driving mechanism to switch the modes. The function switching mechanism can further comprise an expansion station used for installing the optical element. The invention is used for microscopic imaging equipment such as a digital pathological section scanner and the like, so as to provide multifunctional illumination which is high in integration level, high in uniformity and capable of being flexibly switched.

A method including illuminating a diffuser with a light beam from a light source; transmitting the light beam through the diffuser to produce a bundle of rays of light exiting the diffuser with an angular spread; imaging the diffuser onto a transmissive or reflective spatial light modulator through relay optics; illuminating the transmissive or reflective spatial light modulator with the bundle of rays of light exiting the diffuser; sampling the light beam exiting the diffuser by reflecting a fraction of the light beam toward a detection system using a sampler; directing sampled light to the detection system at a sampled aperture plane; measuring an intensity distribution of the sampled light across the sampled aperture plane using one or more photodetectors of the detection system; analyzing the intensity distribution with an analyzer to detect an anomaly; and generating a signal when the anomaly is detected.

The application belongs to the technical field of optical imaging, and particularly relates to a small-F-number long-waveband infrared imaging optical system, which comprises an aperture plane, a first lens, a second lens, a third lens and an image plane; the first lens is a positive lens made of IRG206 material, and the second surface thereof is an aspheric surface; the second lens is a negative lens made of ZNS_IR material; and the third lens is a positive lens made of IRG204 material; the application adopts a 3-lens structure, has low material cost, high system transmittance, long detection distance, small relative aperture and F number=1; and expensive germanium material is replaced by low-cost materials such as zinc sulfide (ZNS_IR) and chalcogenide glass (IRG206), so that the application has the advantages of cost and mass production.