32results about How to "Large exit pupil diameter" patented technology

The invention relates to a two-piece free-form surface head mounted display optical system, and belongs to the field of optical system designs. The system comprises a microdisplay, a free-from surface prism with three optical surfaces and a free-form surface lens with two optical surfaces. Two of the three optical surfaces of the free-form surface prism in the two-piece free-form surface head mounted display optical system of the invention are free-form surfaces; the top surface of the prism, namely the third surface of the prism is a plane; and in a processing process, the top surface can serve as a base surface so as to reduce the difficulty in positioning the free-form surface and reduce processing cost. In the system, a free-form surface lens is added; the two optical surfaces of the free-form surface lens are respectively a free-form surface and a plane, so the processing difficulty is low; moreover, the surface shape parameters, the thickness, the eccentricity and a dip angle of the free-form surface lens can serve as optimization variables; and more optimization variables are more contributive to correcting a system aberration, so that a greater exit pupil diameter can be realized.

The invention discloses a near-to-eye display system comprising an image source and an array imaging device. The array imaging device consists of at least two imaging mirror surfaces; and exit pupils corresponding to all the imaging mirror surfaces are spliced together. Image light outputted by the image source is reflected to a human eye by the array imaging device to form a projection image; and ambient light is transmitted by the array imaging device to enter the human eye to form an environmental image. Because the array imaging device consists of at least two imaging mirror surfaces and the exit pupils corresponding to all the imaging mirror surfaces are spliced together, the exit pupil diameter of augmented reality equipment is extended equivalently, so that the image light outputted by the augmented reality equipment can enter the pupil of the eye easily. Compared with the exit pupil of the single optical lens, the exit pupil provide by the system increases obviously, so that the strict restriction of the position of human eye observation is reduced or avoided and thus the applicable people range of the augmented reality equipment is extended. Moreover, pupil distance adjustment of the augmented reality equipment by the user is not required.

The invention discloses a splicing type head-mounted display device, which comprises a plurality of display channels, wherein the display channels are positioned in front of human eyes and distributed relative to gazing directions of the human eyes symmetrically; and an exit pupil center of each display channel is positioned at the eye pupil center of each human eye, and overlapping parts of the adjacent display channels are combined together by adopting a method of splicing after cutting. The splicing type head-mounted display device can be applied to virtual reality and augmented reality, has the advantages of large exit pupil diameter, long exit pupil distance, large field angle, uniform image plane illumination and small F value, is composed of optical components all of which consist of spherical lenses, and adopts the cutting and splicing method, so that the display device is compact in structure, easy to process and convenient adjust.

The invention discloses a HUD (Head Up Display) optical system and application thereof on a motor vehicle. The optical system comprises a front reflector group, a lens group and a rear reflector, which are arranged in sequence from the object space of the optical system to the image space of the optical system, wherein the overall lens group can move axially. According to the technical solution, the vehicle information displayed on an instrument panel is clearly displayed on a windshield in a combination mode of the front reflector group, the lens group and the rear reflector, the projection distance can be changed by movement of the lens group, and large exit pupil diameter and long exit pupil distance can be realized to enlarge the visible range of a user.

The invention relates to an optical lens system, in particular to a refractive-diffractive mixed optical lens optical system consisting of a refractive-reflective free curved plane and a diffractive plane. The optical system comprises a refractive-reflective free curved plane binary optical lens, wherein the refractive-reflective free curved plane binary optical lens comprises an incident plane of the diffractive plane, a refractive plane of the refractive-reflective free curved plane and a spherical reflective plane; lights emitted by a display chip are converged into the lens by using the incident plane; lights entering the lens from the incident plane are all reflected to the reflective plane by using an emergent plane; lights reflected by the emergent plane are secondarily reflected by using the reflective plane, reflected to the emergent plane and finally refracted to parallel lights by using the emergent plane so as to enter pupils; and thus an image amplified by the refractive-reflective free curved plane binary optical lens can be seen. The refractive-diffractive mixed optical lens optical system provided by the invention has the following advantages: the structure of the optical system has the characteristics of small light energy loss, small color difference, clear imaging quality, light weight, convenience for wearing, less optical parts, simple structural form, convenience for assembling and simplicity for adjusting.

The invention provides a large-exit-pupil-diameter eyepiece system adaptive to a large target surface. The eyepiece system sequentially comprises a first cemented lens group, a first single lens, a second single lens, a third single lens and a second cemented lens group from an object space to an image space, wherein the first glued lens group comprises a biconvex positive lens and a biconcave negative lens which are glued together, the first single lens is a biconcave negative lens, the second single lens is a biconvex positive lens, the third single lens is a biconvex positive lens, and the second glued lens group comprises a biconvex positive lens and a biconcave negative lens which are glued together. The eyepiece system has the advantages of being large in exit pupil diameter, small in number of lenses, small in size, light in weight, high in resolution ratio and the like, and has good imaging quality.