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1272results about How to "Large field-of-view" patented technology

Conjugated narrow-band tri-phosphor staggered volume holographic grating waveguide near-to-eye optical display device

The invention provides a conjugated narrow-band tri-phosphor staggered volume holographic grating waveguide near-to-eye optical display device. The device comprises an image display light source which is used for providing image information to be viewed, a P&S photo-conversion component which is used for converting P light and S light, a collimating lens group which is used for collimating light wave, a PBS component which is used for the polarizing beam-splitting of light wave, a beam-splitting selecting component which is used for uniformly spreading the light wave on a coupling input surface; a conjugated tri-phosphor staggered coupling input volume holographic grating which is used for dispersing incident ray and totally reflecting and transmitting the ray inside the substrate, a light-guide transmitting substrate which is used for totally reflecting and transmitting the light wave, and a conjugated tri-phosphor staggered coupling output volume holographic grating which is used for coupling the dispersed incident ray in sequence and outputting the ray to the outside of the substrate. The device has the advantages of full color, ultra-thinness, large field angle and simplicity in process and implementation, and can be applied to the damage-free display of a mobile screen, the display of a terminal, the scene teaching instruction for a doctor, the real-time information positioning for fire fighting, 3D game and other fields.
Owner:SHANGHAI RAYPAI PHOTONIC CRYSTAL LTD

Method of controlling holder camera to automatically track target

The invention relates to a method of controlling a holder camera to automatically track a target. The method comprises the following steps. A tracking model is automatically chosen. A video frequency processing module automatically chooses an automatic tracking model and a global search model according to the tracking state of the target. The processing process of the automatic tracking model is that the video frequency processing module judges the state of the holder camera and after the tracked target is matched, control orders are sent according to the position and size of the target to regulate the position and the focal distance of the camera. The processing process of the global search model is that the video frequency processing module detects and matches the target through a taking turn manner in a plurality of search areas of a monitored area until the tracked target is found. The invention has reasonable design, realizes the automatic tracking function of the camera on the target, ensures that the position and size of the target are suitable for monitoring, has the advantages of high tracking precision, strong real-time property, low cost, flexible expansion and the like, facilitates the use of monitoring staff and improves the work efficiency of the monitoring staff.
Owner:TIANJIN YAAN TECH CO LTD

Diopter-adjustable curved surface waveguide near-to-eye optical display device

The invention provides a diopter-adjustable curved surface waveguide near-to-eye optical display device which comprises an image display light source used for providing image information used for observation, a collimating lens set used for collimating optical waves, a PBS (polarization beam-splitting) assembly used for performing polarization beam-splitting on the optical waves, a P&S photo-conversion assembly used for realizing conversion of P light and S light, a P&S beam-splitting selection assembly capable of enabling the optical waves to uniformly cover a coupling input surface, a micro-curved surface waveguide substrate used for performing total-reflection propagation on the optical waves, and a micro-local curvature coupling output surface used for enabling the transmitted optical waves to be coupled and output out of the substrate, expanding a view field angle and adjusting the diopter. The diopter-adjustable curved surface waveguide near-to-eye optical display device has the advantages of adjustable diopter, lightweight, thinness, large view field angle, simplicity for processing and design, easiness for realization, compact structure and high energy utilization rate of an image source, can be used in various fields of remote medical information teaching, virtual reality simulation training, fire rescue information positioning guidance, road enhancement display and the like, and can be used as a display of a terminal.
Owner:SHANGHAI RAYPAI PHOTONIC CRYSTAL LTD

Head-raising display device and vehicle with same

The invention discloses a head-raising display device which can realize large-visual-field-angle double-picture displaying and a vehicle with same. The head-raising display device matches an image display unit in use and comprises an image generating unit and an image projection unit which is arranged between the image generating unit and the image display unit. The image generating unit at least can generate a first light beam which represents a first image and a second light beam that represents a second image. The image projection unit at least comprises a first optical module and a second optical module. The first optical module reflects the first light beam and performs beam expanding for forming a first emergent light beam. The second optical module reflects the second light beam and performs beam expanding for forming a second emergent light beam. The first optical module and the second optical module are constructed in a manner that the first emergent light beam and the second emergent light beam are deviated from each other in a manner that an included angle exists between each other, thereby correspondingly projecting a first virtual image picture and a second visual image picture which are not overlapped with each other on the image display unit to the visual field of a user.
Owner:SHENZHEN DIANSHI INNOVATION TECH CO LTD

Laser and middle- and long-wavelength infrared common-aperture three-band imaging system

The invention relates to a laser and middle- and long-wavelength infrared common-aperture three-band imaging system, which comprises an entrance pupil shared by each band, a primary mirror, a secondary convex mirror, a middle/long-wavelength infrared optical path imaging lens group, a laser converging light spot receiving unit, a middle- and long-wavelength infrared band beam splitter, a middle- and long-wavelength infrared dual-band imaging lens group and a detection image surface, wherein the reflection surface of the primary mirror is a concave surface, and a hole is formed in the center of the primary mirror. The system can be used for realizing the common-aperture collection of scene infrared radiation energy of the same object and laser echo energy reflected by the object; and the entrance pupil is positioned in front of the primary mirror, the secondary mirror is used for the beam splitting of laser and middle- and long-wavelength infrared bands, and a dichroic mirror is inclined to split middle-wavelength infrared light and long-wavelength infrared light, so that the system is compact in structure, the utilization rates of optical energy and space of the system are increased, the aberration correction and beam focusing of middle- and long-wavelength infrared bands are facilitated respectively, and the imaging quality is remarkably improved.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
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