39results about How to "Guaranteed clear imaging" patented technology

The invention relates to a large field-of-view stray light PST (point source transmittance) testing method and a large field-of-view stray light PST testing device. The large field-of-view stray light PST testing device comprises a large dynamic range light source, a collimator, a clean room, a high-load turntable, an EMCCCD (electron multiplying charge coupled device) and a data acquisition and processing system, wherein the collimator is arranged on the path of emergent light of the large dynamic range light source; the EMCCD is arranged on the high-load turntable and is electrically connected with the data acquisition and processing system; the large dynamic range light source is electrically connected with the data acquisition and processing system; the high-load turntable is arranged on the path of emergent light after passing through the collimator; and the large dynamic range light source, the collimator, the high-load turntable, the EMCCD and the data acquisition and processing system are arranged in the clean room. The large field-of-view stray light PST testing method and the large field-of-view stray light PST testing device provided by the invention have the advantages that the stray light inhibiting ability of the lens hood of a astronautic camera can be effectively evaluated on the ground, the signal-to-noise ratio of the entire camera can be estimated, the astronautic camera can be guaranteed to pick up clear images after the astronautic camera is launched into the sky, the field of view is ultralarge and the accuracy is high.

The invention relates to a large-diameter stray light measuring device and a testing method. The large-diameter stray light measuring device comprises a target simulator, a spherical collimator tube, a detection system and a data acquisition and processing system. The target simulator is disposed on an incident path of the spherical collimator tube. An optical system to be detected is disposed on an emergent path of the spherical collimator tube. The detection system is disposed on an image surface of the optical system to be detected. The detection system is connected with the data acquisition and processing system. The large-diameter stray light measuring device and the testing method can be used to effectively assess stray light inhibiting ability of the optical system structure.

The invention relates to a minitype single-chip LCOS projection optical engine which is composed of a projection lens, a PBS beam splitter, a field lens and an LCOS chip which are sequentially arrayedalong a system imaging optical axis from a screen side to an image plane side, the PBS beam splitter and the imaging optical axis form a 45-degree angle, and an illuminating system of an optical engine is formed by an LED light source lens, a first condenser lens, a cylindrical lens and a second condenser lens which are sequentially arrayed along the optical axis of the illuminating system. The optical axis of the illuminating system and the optical axis of an imaging optical path from a 90-degree angle, and the PBS beam splitter, the field lens and the LCOS chip are commonly used by the imaging optical path and an illuminating optical path. An illuminating central beam is vertically radiated on the LCOS chip after being reflected by the PBS beam splitter, the system moves forward and backward to realize focusing along the imaging optical path by the projection lens, so as to ensure to realize to image clearly at different distances. The system has low cost and good process and is suitable for batch production.

The invention belongs to the technical field of optical technologies and medical optical images, particularly relates to a scanning synchronous imaging and indicating device and method for venous vessels and aims to receive a scanning imaging signal by using a linear array photoelectric sensing element, simulate or digitalize a photoelectric signal and form indicating vessels by using a visible light LED array in a discrete light spot form, and image processing with a large data volume and image calibration are eliminated. The technical scheme adopted by the invention is that the scanning synchronous imaging and indicating device comprises a near-infrared LED light source for illuminating the vessels and an imaging lens, wherein a scanning galvanometer is arranged between the imaging lens and an imaging plane thereof; the linear array photoelectric sensing element capable of sensing near-infrared light is arranged on the image plane reflected by the scanning galvanometer; a near-infrared interference filter is arranged between the imaging plane where the linear array photoelectric sensing element is positioned and an optical axis of reflecting light of the scanning galvanometer; the near-infrared interference filter is parallel to a mirror surface of the scanning galvanometer during immobility; the visible light LED array is connected to a driving end of a signal processing and driving circuit; a projection lens is arranged between the visible light LED array and the near-infrared interference filter.

The invention relates to a high-resolution economic 2.6mm lens, comprising a main lens barrel, wherein a front lens set A and a front lens set B are sequentially arranged in the main lens barrel in the incident light direction, a diaphragm is arranged between the front lens set A and the front lens set B, and a filter is arranged at the rear end of the front lens set B. The lens is simple in structure and small in number, can reach high-quality pixels by day, and can also ensure high quality of images through infrared supplementation in poor light or at night; and the lens is made of a little glass, so the assembly difficulty of the lens is relieved and the production cost is reduced.

The invention discloses an optical lens achieving temperature compensation. The optical lens comprises a lens outer shell, and lens bodies are arranged inside the lens outer shell from object space to image space and made of optical glass and/or optical resin. The lens bodies sequentially comprise the first lens body, the second lens body, the third lens body and the fourth lens body. The first lens body is a straw-hat-shaped lens body with negative focal power, the second lens body is a bi-convex type lens body with positive focal power, the third lens body is a bi-convex type lens body with positive focal power, and the fourth lens body is a bi-concave type lens body with negative focal power. A diaphragm element is arranged between the first lens body and the second lens body, the fourth lens body is connected with a color filter, visible light bands and near-infrared bands guided into the lens are focused on the same focal plane, and therefore the optical lens can clearly perform imaging in day and night modes.

The invention provides a zoom lens, a working method thereof and an imaging device, wherein the zoom lens comprises a focusing lens group with negative optical power, a diaphragm, a zoom lens group with positive optical power and moving in the positive and reverse directions of the optical axis of the zoom lens, a fixed lens group with negative optical power and a light filter which are sequentially arranged from an object side to an image side; the focal length f1 of the focusing lens group, the focal length f2 of the zoom lens group and the focal length f3 of the fixed lens group satisfy therequirements shown in the description. The zoom lens has the advantages of full-range infrared focusing, no virtual focus at high and low temperatures and the like.

A wide-angle telephoto imaging optical system is composed of a front lens group with negative focal power and a rear lens group with positive focal power which are sequentially arranged from an objectside to an image side. The front lens group is composed of a negative first lens, a negative second lens and a positive third lens. The rear lens group is composed of a positive fourth lens, a negative fifth lens, a positive sixth lens and a negative seventh lens. A diaphragm is located between the front lens group and the rear lens group. The imaging system meeting the conditional expression ofthe invention can obtain a larger focal length while meeting a larger field angle.

Disclosed is a large-target-surface miniaturized non-refrigeration infrared continuous zooming optical system. The large-target-surface miniaturized non-refrigeration infrared continuous zooming optical system comprises a first meniscus positive lens, a biconcave negative lens, a biconvex positive lens, a second meniscus positive lens, a third meniscus positive lens and a detector; the lens adoptsa refractive-diffractive hybrid system; through reasonable distribution of the focal power of each lens, the number of lenses of the system is reduced, the volume of the system is reduced, and the weight of the system is lowered; the zooming curve of the system is smooth and continuous, and the phenomenon of stagnation in the zooming process is effectively avoided; by adopting a mode of axially moving the third meniscus positive lens, the image plane off-focus compensation of the system in the temperature range of minus 40 DEG C to plus 60 DEG C and the off-focus compensation of the distancechange of an observed object are realized, the clear imaging of objects with different distances is ensured, and the system complication caused by the non-refrigeration design is avoided; and the large-target-surface miniaturized non-refrigeration infrared continuous zooming optical system fills the blank of a continuous zooming optical system which is adapted to a 1024 * 768 long-wave non-refrigeration type detector in China.

The invention relates to a zoom lens which comprises a compensation group (G1) with negative focal power, a first fixed group (G2) with positive focal power and a zoom group (G3) with positive focal power which are sequentially arranged from an object side to an image side along an optical axis, and further comprises a second fixed group (G4) located on the image side of the zoom group (G3). In the zooming process, the first fixed group (G2) and the second fixed group (G4) are fixed relative to image plane positions, and the compensation group (G1) and the zoom group (G3) can move along an optical axis. The zoom lens provided by the invention has the characteristics of ultra-large aperture, large target surface and low cost.

The invention provides an optical lens, which sequentially comprises, from an object side surface to an imaging surface, a first lens with negative focal power, wherein the objective side and the image side near the optical axis are both concave surfaces; a second lens with positive focal power; a diaphragm; a third lens with positive focal power, wherein the image side of the third lensnear the optical axis is a convex surface; a fourth lens with positive focal power, wherein the object side and the image side of the fourth lens near the optical axis are convex surfaces; a fifth lens with negative focal power; and a sixth lens with negative focal power, wherein the image side of the sixth lens near the optical axis is a concave surface, wherein the FOV of the optical lens is greater than 150 degrees; the distance TTL from the object side to the image of the first lens of the optical lens is less than 5.8 mm.

The invention discloses a two-degree-of-freedom guide rail for ellipsoidal glass bulb detection and relates to a two-degree-of-freedom guide rail. The problem that a large-size ellipsoidal glass bulbis difficult to machine because the conventional ellipsoidal glass bulb is high in processing difficulty and the machining precision is difficult to ensure is solved. An outline of a guide rail assembly is semicircular, a first groove and a second groove are formed in a connecting slide block, the connecting slide block is arranged on the guide rail assembly by the first groove and connected withthe guide rail assembly in a sliding manner; the first groove and the second groove in the connecting slide block are mutually perpendicular to each other; a camera connecting support rod is insertedinto the second groove of the connecting slide block; and the camera connecting support rod points at a center of a circle of the guide rail assembly. The two-degree-of-freedom guide rail disclosed bythe invention is applied to the ellipsoidal glass bulb detection.

The present invention relates to a zoom lens comprising a compensation lens group (G1) having a negative refractive power, a stop (STO), and a zoom lens group (G2) having a positive refractive power arranged in order along an optical axis from an object side to an image side, the compensation lens group (G1) comprising a first lens (L1), a second lens (L2), and a third lens (L3) along the optical axis from the object side to the image side, the zoom lens group (G2) comprises fourth optical elements (B4, L4), a fifth lens (L5), a sixth lens (L6), a seventh lens (L7) and an eighth lens (L8), and the eighth lens (L8) is a convex-concave lens. According to the zoom lens, infrared confocal, athermalization and ultralow cost can be realized.

The invention relates to a large-scale structure space deformation measurement device and method with a reference light beam capable of non-linearly passing across obstacles, and the device comprises a space reference emission unit and a space pose measurement unit which are designed in a split type structure, thereby improving the flexibility of the device, and having high expansibility based on a series structure. The space reference emission unit adopts cross curve structured light as a reference light beam and provides a space pose measurement reference, and the space pose measurement unit can measure space deformation relative to the reference light beam; the space reference transmitting unit and the space pose measuring unit are used in cooperation to achieve measurement reference transmission, and can be used for large-scale structure space deformation measurement under the condition that the measurement reference and a measurement end are not intervisible due to obstacle shielding. The positions of the image sensor and the image receiving screen are fixed, so that the problem that the system measurement precision is reduced along with the measurement distance in the traditional space deformation measurement technology based on photogrammetry is avoided.