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

The invention discloses an OLED display panel and a manufacturing method thereof. A through hole is formed in the OLED display panel; the through hole comprises a first hole cavity and a second hole cavity; the first hole cavity cuts off a part of a membrane layer exposed by a side wall of the through hole to block a path for water vapor to invade the OLED display panel from the side wall of the through hole; and the second hole cavity penetrates through a substrate, so that clear imaging of a camera at the lower part of a screen is ensured. The OLED display panel has the beneficial effects that part of the membrane layer around the through hole is cut off to cut off a water vapor invasion channel on the side surface of the through hole, so that the packaging reliability of an OLED deviceis guaranteed, the light transmittance of the through hole is improved, and the clear imaging of the camera at the lower part of the screen is guaranteed.

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 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.

An infrared continuous zoom optical system with a long focal length and a large target surface, comprising a first meniscus positive lens, a biconcave negative lens, a biconvex positive lens, a meniscus negative lens, a second meniscus positive lens, and a third meniscus Positive lenses and detectors; the above-mentioned lenses adopt a refraction-diffraction hybrid system, which reduces the number of system lenses and reduces the weight of the system through the reasonable distribution of different lens powers; the zoom curve of the system is smooth and continuous, effectively avoiding the system Stuck phenomenon occurs during the zooming process; the method of moving the third meniscus positive lens with axial fine-tuning is used to realize the image plane defocus compensation of the system in the temperature range of -40°C ~ +60°C and the distance change of the observed object. The resulting system defocus compensation ensures clear imaging of objects at different distances; the long focal length and large target surface infrared continuous zoom optical system of the present invention fills the domestic telephoto continuous zoom system adapted to 1024×768 uncooled infrared detectors Optical system blank.

The invention discloses a long-distance large-field-of-view dual-target determination method based on a total station. The realization of the method includes a binocular camera, a total station and a marker. The distance between the binocular camera and the marker is 100m, so The distance between the total station and the marker is greater than 10m, and the binocular camera is electrically connected to a computer system PC; the method includes the following steps: step (1) image acquisition: use the binocular camera for image acquisition; step (2) angle Point extraction: take a marker with only one feature point, and the corner point extraction is divided into two parts: corner point detection and sub-pixel positioning; step (3) marker three-dimensional coordinate measurement: take a single marker and set it to have only one For feature points, when the number of markers is increased to meet the measurement requirements, the three-dimensional coordinates of the feature points of the markers measured by the long-distance total station are set to (X, Y, Z); step (4) camera calibration. The invention solves the problems of low calibration accuracy and low flexibility in the long-distance and large field of view in the existing calibration methods, and meets actual needs.

The invention provides an optical lens, which comprises in sequence from the object side to the imaging surface: a first lens with negative refractive power, at the near optical axis, the object side and the image side are both concave surfaces; the first lens with positive refractive power Two lenses; diaphragm; the third lens with positive power, its image side is convex at the near optical axis; the fourth lens with positive power, at the near optical axis, its object side and image side are both a convex surface; a fifth lens with negative power; a sixth lens with negative power, the image side of which is concave at the near optical axis. Wherein, the FOV of the optical lens is >150°; the distance TTL from the object side to the image plane of the first lens of the optical lens is <5.8 mm.

A wide-angle telephoto imaging optical system is composed of a front lens group with negative refractive power and a rear lens group with positive refractive power, which are sequentially arranged from the object side to the image side; wherein the front lens group is composed of a negative first lens group. The lens, the second negative lens and the 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, and the diaphragm is located in the front lens group and between the rear lens groups. An imaging system that satisfies the conditional expression of the present application can obtain a larger focal length while satisfying a larger angle of view.