28 results about "Low distortion" patented technology

This invention relates to the field of AR device technology, providing an AR optical lens and an AR device. The lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged sequentially along the optical axis from the object side to the image side. The first lens has positive optical power, with a convex surface on the object side and a concave surface on the image side; the second lens has positive optical power, with a convex surface on the object side and a concave surface on the image side; the third lens has negative optical power, with both the object side and the image side being concave; the fourth lens has positive optical power, with a concave surface on the object side and a convex surface on the image side; and the fifth lens has negative optical power, with a concave surface on the object side and a convex surface on the image side. All lenses are aspherical lenses. This invention, through a positive-positive-negative-positive-negative optical power arrangement of lenses, can simultaneously correct various aberrations such as spherical aberration, field curvature, and distortion, effectively achieving a large field of view, low distortion, and high resolution imaging effect, enhancing the immersiveness and clarity of AR displays.

This invention discloses a method and system for adaptive cancellation of strong and weak signals based on complex structures. The method includes: using a complex RLS adaptive filtering algorithm to track and filter strong interference signals in a complex observation signal to obtain a filtered output signal; during filtering, applying a new filter coefficient vector obtained iteratively from the current complex observation signal to the input complex observation signal after a delay of N periods, thereby decoupling the filter coefficient update from the signal filtering in time, allowing the filtering and filter coefficient update processes to be executed asynchronously; subtracting the filtered output signal from the desired signal to achieve adaptive cancellation of strong signals; and extracting weak signal features from the cancelled signal. This invention fully utilizes the complete information of complex signals in amplitude and phase, overcoming the limitations of traditional real-number processing methods in separating overlapping spectrum signals. It is particularly suitable for complex scenarios where strong and weak signals have similar spectra and large power differences, and has the advantages of high precision, low distortion, and strong real-time performance.

This utility model belongs to the field of optical lens technology and discloses a low-distortion, low-CRA, high-pixel miniaturized lens. It includes a first glass lens, a second plastic lens, a third glass lens, a fourth glass lens, a fifth plastic lens, a sixth plastic lens, and a seventh plastic lens arranged sequentially along the optical axis from the object plane to the image plane. The third glass lens, the fourth glass lens, the fifth plastic lens, and the seventh plastic lens have positive focal lengths, while the first glass lens, the second plastic lens, and the sixth plastic lens have negative focal lengths. The second plastic lens plays a role in correcting distortion, and the seventh plastic lens plays a role in correcting distortion and CRA to a certain extent. Through the curvature system of each lens and the cooperation of multiple plastic sheets, the distortion can be reduced to within 3%, thereby achieving the requirements of low distortion and low CRA in a high-pixel miniaturized lens.

This invention relates to a correction system and method for low image aberration in multi-sided composite rigid optical fibers. The correction system for low image aberration in multi-sided composite rigid optical fibers is characterized by comprising a drawing tower, a high-precision lead screw fixed at its uppermost end, an electric micro-rotation device fixed on the lead screw, a fixing rod on one side of the drawing tower, and a base, a dual-channel laser diameter gauge, and a drawing wheel fixed sequentially from top to bottom on the fixing rod. A heating furnace is mounted on the base. This invention achieves rapid correction of axial image aberration in multifilament fibers by engraving corresponding angle marks on the binding clamps at the upper end of the master rod and then adjusting the angle of the master rod by referring to a graphical representation of a rule derived from the combination of numbers and shapes.

A microscope objective sequentially includes from an exit side to an object side: a first lens having positive refractive power, a second lens having negative refractive power, a third lens having negative refractive power, a fourth lens having negative refractive power, a fifth lens having positive refractive power, a sixth lens having positive refractive power, a seventh lens having negative refractive power, an eighth lens having positive or negative refractive power, a ninth lens having positive refractive power, a tenth lens having positive refractive power, an eleventh lens having negative refractive power, a twelfth lens having positive refractive power, a thirteenth lens having negative refractive power, and a fourteenth lens having positive refractive power. Following relational expressions are satisfied: 1.60≤f9 / f≤4.00; −3.00≤f10_11 / f12_13≤−1.40; −9.00≤(R27+R28) / (R27−R28)≤−1.60; 0.05≤WD / TTL≤0.13; 2.40≤WD*NA≤5.50. The microscope objective has compact structure, has excellent optical performance, and meets the design requirements of low distortion, magnification of 10 times and long working distance.

This application provides a lightweight compression and transmission method, system, and medium for decoration data. The method includes: collecting multi-source data throughout the entire decoration lifecycle; classifying the multi-source data to obtain different types of decoration data; preprocessing the different types of decoration data to obtain preprocessed different types of decoration data; performing differentiated compression processing on the preprocessed different types of decoration data to obtain compressed decoration data blocks; obtaining current network transmission status information and analyzing idle transmission paths based on the current network transmission status information; transmitting the compressed decoration data blocks according to the idle transmission paths to obtain transmission result information; and achieving efficient, low-distortion, and reliable transmission of decoration data through data preprocessing, differentiated compression algorithms, and intelligent transmission strategies, thereby reducing data transmission bandwidth usage and storage costs, and adapting to the data collaboration needs throughout the entire decoration industry lifecycle.

An immersion objective, an optical system and a detection method. The immersion objective sequentially comprises, in the direction from an object side (S) to an image side, a first lens group (G1) having a positive focal power, at least one group of lens groups (G5, G6) having a negative focal power, and an immersion medium (m) which is located on the object side (S) of the first lens group (G1) and immerses at least part of the first lens group (G1), wherein the working distance S0 of the immersion medium (m) between the first lens group (G1) and the object side (S) and the focal length Fobj of the immersion objective satisfy the conditional expression 0≤S0 / Fobj≤0.16. By means of the cooperation of a plurality of groups of lenses, an immersion objective has a relatively small size and a relatively low mass within a relatively compact size range, and a large field of view, a high resolution and a low distortion are achieved, thereby improving the optical performance of the immersion objective.

The application discloses a full-frame lens, which comprises a first lens group with positive refractive power, a diaphragm, a second lens group with positive refractive power, a third lens group with negative refractive power and a fourth lens group with negative refractive power arranged in sequence along an optical axis from an object side to an image side; the first lens group, the second lens group and the fourth lens group are fixed groups; the third lens group moves along the optical axis to focus when the focal point deviates at different object distances; the first lens group comprises a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power and a fifth lens with positive refractive power; the second lens group comprises a sixth lens with negative refractive power, a seventh lens with positive refractive power and an eighth lens with positive refractive power; the third lens group comprises a ninth lens with negative refractive power; and the fourth lens group comprises a tenth lens with positive refractive power and an eleventh lens with negative refractive power. The high-resolution full-frame lens with ultra-wide angle, low distortion and low breathing effect has a broad market prospect.

This invention relates to a compact, high-resolution, wide-field-of-view freeform surface off-axis four-mirror optical system, belonging to the field of optical system design technology. It addresses the problems of current imaging systems used in high-resolution space remote sensing cameras, which cannot simultaneously achieve a large field of view, small size, high imaging performance, and are bulky. This invention employs an off-axis system reflection structure, including a first mirror, a second mirror, an aperture stop, a third mirror, a fourth mirror, and an image plane arranged sequentially along the optical path. The aperture stop is located on the second mirror. The first and third mirrors utilize Zernike fringe surfaces, while the second and fourth mirrors utilize standard quadric surfaces and even-order aspherical surfaces, respectively. The four mirrors are arranged in a trapezoidal structure, sequentially in a positive-negative-positive-positive order of optical power. This invention can achieve near-diffraction-limited imaging in the visible and near-infrared bands, achieving both high resolution and a wide field of view while maintaining a compact structure and low distortion.

The present invention discloses an objective lens for a microscope. The objective lens for the microscope has a focal length of f, an optical length of TTL, an image height of IH, a combined focal length of the first and second lenses of f1_2, a focal length of the third lens of f3, a combined focal length of the 14th, 15th, and 16th lenses of f14_15_16, a combined focal length of the 17th and 18th lenses of f17_18, an on-axis thickness of the 17th lens of d33, an on-axis thickness of the 18th lens of d35, and satisfies the following relationship. The objective lens for a microscope according to the present invention has a compact lens, excellent optical properties, low distortion, a magnification of 20x, and a long working distance. -3.10 ≤ f1_2 / f3 ≤ -1.80 3.40 ≤ f14_15_16 / f ≤ 7.00 4.00≦f17_18 / (d33+d35)≦120.00 0.08 ≤ IH*f / TTL ≤ 0.09

This application discloses an optical system including a short-focal-length eyepiece and a display adapted to the eyepiece. The short-focal-length eyepiece has a focal length of 13.7 mm, a field of view of 40°, a magnification of 18x, an exit pupil diameter of 8 mm, an exit pupil distance of 20 mm, an operating temperature range of -40℃ to +60℃, and an operating wavelength range of 0.48 to 0.65 μm. The display is an OLED display with a resolution of 1024×768 and a pixel size of 7.8 μm. The short-focal-length eyepiece consists of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the eye side to the image side. The first and second lenses are cemented together, and the fourth and fifth lenses are cemented together. This short-focal-length eyepiece can achieve clear imaging of a large target area, meets the requirements of low distortion, and adopts a non-thermal compensation method, exhibiting good imaging performance at different operating temperatures.

This invention discloses a video lens and an electronic device. The video lens has an object side and an image side arranged opposite to each other along the optical axis. The video lens includes a lens barrel and a lens group disposed within the lens barrel. The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a photosensitive chip arranged sequentially from the object side to the image side. The video lens satisfies the following condition: 0.1≤FA / TTL≤0.25, where FA is the optical focal length of the video lens, and TTL is the distance between the object side surface of the first lens and the imaging surface of the video lens on the optical axis. Through the reasonable arrangement of the five lenses, the optical focal length FA and the total optical length TTL of the optical system of the video lens satisfy the relationship: 0.1≤FA / TTL≤0.25, and the distortion rate reaches below 3%, so as to provide a video lens with small size, low distortion rate, and 4K high pixel resolution.

The application provides a small-size large-view-field high-resolution low-distortion human-eye-simulating lens with a pupil outside, which comprises, in sequence from an object side to an image side, an aperture for simulating a human eye pupil, a lens set comprising first to seventh lenses arranged in sequence from the object side to the image side and having air gaps between each adjacent lens; wherein the first lens is an aspherical lens, and the second to seventh lenses are spherical lenses; wherein the first, fourth and fifth lenses have positive focal powers, and the second, third, sixth and seventh lenses have negative focal powers; wherein a separation distance ST of the aperture and the first lens on an optical axis is greater than or equal to 8 mm; a focal length f1 of the first lens and a central thickness d1 satisfy: 8.17 <= |f1 / d1| <= 18.88; and a combined focal length f02 of the second to seventh lenses and an effective focal length f of the human-eye-simulating lens satisfy: 2.08 <= |f02 / f| <= 6.75.

This invention relates to an optical camera, comprising a lens barrel and an imaging lens group and a plurality of spacer elements housed within the lens barrel; the imaging lens group, along the optical axis from the object side to the image side, sequentially comprises: a first lens with negative optical power, a second lens with positive optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, and a sixth lens with negative optical power; the plurality of spacer elements includes a third spacer element and a fourth spacer element; the optical camera satisfies: 15.20≤T45 / T56≤24.59; 1.05≤T45 / EP34≤2.01; 1.11≤R8 / d4s≤1.42; -1.09≤R9 / d5s≤-0.63. The optical camera of this invention ensures high resolution and low distortion while reducing the influence of stray light, and also achieves miniaturized design of the lens module.

The application discloses a zoom lens, which comprises a first lens group, the first lens group comprises first to fifth lenses with positive, positive, negative, positive and negative refractive powers arranged in order from an object side to an image side along an optical axis; 1.1921<=f(L1) / f<=3.3145; -17.4774<=f(L2-L3) / f<= -0.3297; -60.7101<=f(L4-L5) / f<=29.8635; f(L1) represents a focal length of the first lens, f(L2-L3) represents a cemented focal length of the second and third lenses, f(L4-L5) represents a cemented focal length of the fourth and fifth lenses, and f represents a focal length of an entire optical system when the first lens group is applied to a camera module. The above technical scheme can realize 2X zoom effect, and has the advantages of high resolution, low distortion, low chromatic aberration, small volume, lightness and the like, and can effectively restore a real scene and details of the scene.

This application discloses a vibration damping structure, a dynamic microphone, and an audio device. The vibration damping structure includes a mounting component and a damping component. The mounting component has a mounting position for mounting structural components. The mounting component is made of a flexible material, allowing it to deform flexibly when the structural components are subjected to force. The damping component is connected to the mounting component and can absorb energy and dampen vibrations as the mounting component deforms. In this application, the mounting component provides a mounting position for mounting structural components, allowing the mounting component to sense vibration energy transmitted from the outside and quickly transmit it to the damping component. The damping component then dissipates the vibration energy in a timely manner, effectively reducing vibration transmission and achieving the effects of vibration damping, buffering, and protecting system stability. When this vibration damping structure is applied to a dynamic microphone, it can reduce distortion and interference in all aspects, significantly improving sound quality purity and meeting the requirements of applications with high sound quality and stability.

The application discloses a fixed-focus lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens arranged in sequence along an optical axis from an object plane to an image plane; the object side surface of the first lens is a convex surface, and the image side surface is a concave surface; the object side surface of the second lens is a convex surface, and the image side surface is a concave surface; the object side surface of the third lens is a concave surface, and the image side surface is a convex surface; and the object side surface of the eighth lens is a convex surface, and the image side surface is a convex surface. By arranging the fixed-focus lens to comprise eight lenses and by reasonably arranging the surface shapes of the first lens, the second lens, the third lens and the eighth lens, the machining difficulty of the lens is reduced, the illumination of the lens and the sensitivity of the lens are improved, the aberration of the lens is balanced, the imaging effect of the fixed-focus lens is improved, and the characteristics of being capable of matching a 1'' target surface sensor chip and being capable of giving consideration to wide angle and low distortion and the maximum image surface being up to 16.1 mm are achieved.

This invention discloses a method and apparatus for assessing the impact of spacecraft plumes on in-situ atmospheric detection payloads in orbit. The method includes: Step S1, constructing a continuous flow field model within the spacecraft's thruster nozzle and a designated near-field region at the exit, and solving for macroscopic flow field data; Step S2, reconstructing cross-basin heterogeneous data based on the macroscopic flow field data, converting it into microscopic particle source data; Step S3, establishing a particle transport model adapted to the spacecraft's geometry and tracking rarefied flow particles; Step S4, calculating the quantitative assessment results of payload contamination effects based on the tracking results of rarefied flow particles. This invention significantly improves the physical realism and computational accuracy of vacuum plume diffusion simulation, achieves low-distortion mapping of heterogeneous simulation data during cross-scale transmission, greatly improves the design iteration efficiency during spacecraft development, and constructs a parameterized end-to-end process.

This invention belongs to the field of high-precision visual measurement and feature recognition technology, specifically relating to an ultra-low distortion large-target dual telecentric optical system. It includes four lens tubes connected sequentially, with their axes coincident. Lens tube four, located away from lens tube three, has a C-interface connected to its opposite end. Lens tube one and lens tube two are mounted inside lens tube one, away from lens tube two. Lens tube three is mounted on the side of lens tube three closest to lens tube two. Lens tube four is mounted on the side of lens tube four closest to the C-interface. All four lenses are circular convex lenses with coincident axes. A cemented sheet is mounted on the side of lens tube three closest to lens tube four, and an aperture stop is installed inside lens tube three, between the cemented sheet and lens tube three. This system ensures stable magnification between the output image and the actual object, guaranteeing that the repeatability accuracy of visual size detection is not limited by the object's position within the field of view.

The application relates to a nanofiber acoustoelectric device with a flat frequency response and a preparation method thereof. The nanofiber acoustoelectric device comprises a nanofiber membrane, an upper electrode and a lower electrode, the nanofiber membrane is located between the upper electrode and the lower electrode to form a sandwich structure, and the nanofiber acoustoelectric device is formed. The elliptical through-hole structure utilizes the flexibility of the long axis direction to induce the nanofiber membrane to excite multiple high-order vibration modes under the excitation of sound waves, multiple resonance peaks are superimposed in the frequency domain, the response trough of a traditional device is filled, and thus the intrinsic flat frequency response in the target frequency band is realized. The single elliptical through-hole is expanded into a multi-hole array structure, the effective vibration area can be further expanded and the internal stress of the membrane can be improved through hole coupling, the flat bandwidth is widened, the output voltage is improved, high-fidelity and low-distortion acoustoelectric signal conversion can be realized without a complex external equalization circuit, and the application has important application value in the field of flexible wearable acoustics sensing.

This invention relates to the field of optical measurement technology and discloses a small-sized white light spectral confocal dispersive lens and its optical system. The optical system comprises, from object side to image side, a first lens G1 with negative optical power, a second lens G2 with positive optical power, a third lens G3 with positive optical power, a fourth lens G4 with positive optical power, and a fifth lens G5 with positive optical power. The optical system or dispersive lens provided by this invention has a working distance of 8 mm, a measurement range of 1.5 mm, a maximum NA of 0.28 at the measurement position, and also features high resolution across the entire field of view for the corresponding wavelength and low distortion.

The application discloses a machine vision lens. The machine vision lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens and a thirteenth lens arranged in sequence along an optical axis from an object plane to an image plane. The first lens has positive focal power, the second lens has negative focal power, the third lens has negative focal power, the fourth lens has negative focal power, the fifth lens has positive focal power, the sixth lens has negative focal power, the seventh lens has positive focal power, the eighth lens has positive focal power, the ninth lens has negative focal power, the tenth lens has positive focal power, the eleventh lens has negative focal power, the twelfth lens has positive focal power and the thirteenth lens has positive focal power. The relative positions and focal powers of the lenses are adjusted to ensure that the machine vision lens meets the imaging requirements of high image quality and low distortion at low cost.

This invention belongs to the field of telescope manufacturing technology and discloses a binocular optical system with a large field of view and low edge distortion. Its features include: a first objective lens, a second objective lens, a third objective lens, a focusing lens, a semi-pentagonal prism, a roof prism, a first eyepiece lens, a second eyepiece lens, a third eyepiece lens, a fourth eyepiece lens, a fifth eyepiece lens, and a sixth eyepiece lens arranged sequentially from the object side to the image side along the optical axis. The telescope optical system has a magnification of 8x, an exit pupil distance of 20.90mm, an exit pupil diameter of 5.037mm, and a field of view of 9°.

The application discloses a 50mm full-frame aerial photography lens, and relates to the technical field of optical lenses, which comprises, in sequence from the object side to the image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a diaphragm, a fourth lens with positive refractive power, a fifth lens with negative refractive power and a sixth lens with positive refractive power. The application realizes an optical imaging system with high pixels, full frame, low distortion, low weight and small size by reasonably distributing refractive power, reasonably bending lenses and reasonably matching optical materials with different refractive indexes and Abbe numbers, and can meet the full-frame shooting requirement.

The application discloses a large-view-field telecentric optical imaging system for a chip overlay system and relates to the technical field of optical imaging systems; the system comprises a diaphragm, a first light-splitting prism, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a second light-splitting prism and an image plane, and the diaphragm, the first light-splitting prism, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the second light-splitting prism and the image plane are sequentially arranged along an optical axis from an object side to an image side. The large-view-field telecentric optical imaging system for the chip overlay system has the advantages of a large field of view, a long object distance, high telecentricity on the object side and low distortion; the incident surface and the emergent surface are loaded with light-splitting prisms matched with multiple functional interfaces, and can simultaneously satisfy functions such as light source illumination, self-focusing and high-resolution imaging.

This invention relates to the field of optical lens technology and discloses a glass-plastic hybrid high-definition scanning imaging system, comprising: a first lens, a second lens, a third lens, and a fourth lens arranged sequentially from the object side to the image side. The object side and image side of the second lens are spherical, while the object side and image side of the first, third, and fourth lenses are aspherical. The first lens has negative refractive power, and its object side is convex at the paraxial position. The second lens has positive refractive power, and its object side is convex. The third lens has negative refractive power, and its image side is concave. The fourth lens has negative refractive power, and its object side is concave at the paraxial position, while its image side is convex at the paraxial position. An aperture is also included. This invention is a four-lens system, combining the surface structure of each lens with the optimal range of optical parameters. It can maintain high resolution and low distortion imaging quality in an extremely simplified structure. The cost of the hybrid combination of glass and plastic lenses is significantly lower than that of an all-glass lens solution.

This invention provides a projection lens, comprising, along the optical axis from the projection surface to the image source surface, the following components in sequence: a first lens with positive optical power, having a convex projection-side surface and a concave image source-side surface; a second lens with negative optical power, having a convex projection-side surface and a concave image source-side surface; a third lens with positive optical power, having a convex projection-side surface; a fourth lens with negative optical power, having a concave projection-side surface and a concave image source-side surface; a fifth lens with positive optical power, having a convex projection-side surface and a convex image source-side surface; a sixth lens with positive optical power, having a convex projection-side surface and a convex image source-side surface; a prism; and a protective glass. The projection lens provided by this invention has one or more advantages, such as preventing sunlight backflow, a large aperture, and low distortion.

The present invention discloses a four-piece optical lens, belonging to the technical field of optical imaging, and is applicable to the medium and long focal length camera modules of mobile phones and other portable electronic devices. Along the optical axis from the object side to the image side, the lens is sequentially provided with a positive optical power double convex first lens, an aperture stop, a negative optical power convex-concave second lens, a negative optical power concave third lens, and a positive optical power convex-concave fourth lens, and all lenses are made of plastic aspherical materials. The present invention defines that the air gap T between the second and third lenses and the effective focal length f satisfy 0.28 < T / f < 0.31, achieving an ultra-high compactness where the total optical length TTL and f satisfy TTL / f < 0.85 and TTL < 7.5 mm; at the same time, the lens has a focal length of 8.5 mm to 9.5 mm, an aperture number Fno ≤ 2.4, an absolute value of the full field distortion < 2%, and a semi-image height of 2.2 mm to 2.4 mm. The present invention breaks through the design bottleneck of the ultra-high compactness ratio with a four-piece minimalist structure, and has the advantages of medium and long focal length imaging, large aperture low-light shooting, and low distortion and high image quality. It has low cost and is easy to mass-produce, perfectly adapting to the requirements of the thinning and high-performance imaging of portable electronic devices.