The invention discloses a LED ultrashort-focus projector lens system, and relates to the projection technology in the photoelectric display industry. The system comprises a display chip, and a refraction lens set and a free curved surface reflecting mirror arranged in sequence along an emission optical path of the display chip, the refraction lens set comprises 14 coaxial lenses, the 12 lenses close to the display chip employ the spherical design, the recessed surface of the 13th lens employs the odd aspheric design, the convex surface of the 13th lens and the recessed surface and the convex surface of the 14th lens both employ the even aspheric design, the refraction lens set enables light beams to be in front of the free curved surface reflecting mirror in a bending real image, the free curved surface reflecting mirror employs the off-axis asymmetric free curved surface design and corrects trapezoid distortion of a projection image, and finally the image is imaged on a screen. According to the lens system, the aberration can be effectively corrected, the image quality is improved, and the lens distance is reduced.

LED ultrashort-focus projector lens system

The invention discloses a projection imaging system which comprises a refractor group and a mirror, wherein the refractor group and the mirror are arranged in sequence along the light exiting direction of a light valve and satisfy the formula: 0.9<L1/L2<1.2. L1 is the length of the refractor group. L2 is the distance between the refractor group and the mirror. In the refractor group, a rear groupmirror group with positive diopter, a middle group mirror group with positive diopter and a front group mirror group with negative diopter are arranged in sequence along the light emitting path of thelight valve. A formula in the description is satisfied. F is the equivalent focal length of the refractor group. FB is the equivalent focal length of the rear group mirror group. FM is the equivalentfocal length of the middle group mirror group. FF is the equivalent focal length of the front group mirror group. FC is the equivalent focal length of the mirror. The problem of large picture distortion caused by adjusting the distance between the refractor group and the mirror in the related art is solved.

Projection imaging system and laser projection device

A projection imaging apparatus, which relates to the technical field of imaging. The projection imaging apparatus comprises a light valve and a projection lens. The projection lens comprises a planar mirror group, a refractive lens group, and a curved mirror group. The planar mirror group comprises at least one mirror, and the planar mirror group is disposed between a portion of lenses of the refractive lens group and the curved mirror group. An image beam emitted by the light valve is transmitted through at least a portion of lenses of the refractive lens group, is then incident to the planar mirror group, is reflected at least once by the planar mirror group, and is then incident to the curved mirror group. The curved mirror group is used to reflect and image the image beam onto a screen. The projection imaging apparatus reflects light emitted by a light source by means of the mirrors and then changes the light path, and the optical axes of two mirror groups are not located on the same straight line, which reduces the length of the projection lens and solves the problem in the prior art of the length of projection devices being relatively long, thereby achieving the effect of reducing the length of the projection devices.

Laser projection apparatus

The invention relates to a wavefront aberration estimation method based on star point image spot shape characteristics, and the method comprises the steps: collecting a star point image spot image through a camera under the condition that a sampling theorem is met; analyzing the shape of the acquired star point image spot image, extracting the shape information of the star point image spot image,and judging the imaging surface position of the star point image spot; substituting the extracted shape information into a corresponding analytical formula according to different imaging surface positions, and estimating the wavefront aberration of the optical system. According to the method, dependence on numerical iteration can be greatly reduced while the wavefront detection efficiency and thedetection range are improved, so that the accuracy of a solving result is ensured.

Wavefront aberration estimation method based on star point image spot shape characteristics

The invention discloses a projection lens and a laser projection device, and belongs to the field of optical equipment. The projection lens comprises a base and a refractor set and a reflector set which are sequentially arranged in the base in the light emitting direction, the refractor set comprises a lens cone, a first lens set, a second lens set and a third lens set, and the first lens set, thesecond lens set and the third lens set are sequentially arranged in the lens cone in the light emitting direction, wherein the first lens set is connected with a main lens cone through a curve cone,and can move relative to the main lens cone when the curve cone rotates; the second lens set is connected with the main lens cone through a focusing structure and can move relative to the main lens barrel under the action of the focusing structure so that the first lens set and the second lens set can be moved according to various parameters of a picture to be projected, and the projected picturecan meet requirements. The problem that the projection lens is difficult to meet the requirements of various projection parameters in the prior art is solved. The effects of improving the applicability of the projection lens and enabling the projection lens to be suitable for various projection parameters are achieved.

Projection lens and laser projection device

The invention discloses an ultra-short-focus projection lens, and belongs to the technical field of projection The ultra-short-focus projection lens comprises a refractor group and a reflector group After an image beam passes through the refractor group, the first imaging is carried out between the refractor group and the reflector group, and is reflected by the reflector group to a projection screen to form second imaging The refractor group comprises a first lens group and a second lens group, wherein the first and second lens groups are respectively provided with two aspherical lenses The reflector group comprises a first reflector which is disposed behind the second lens group The refractor group and the reflector group are located on the same primary optical axis The offset of an image formed by the second imaging relative to the primary optical axis is 140%-150% The projection lens provided by the invention can achieve the projection of a short-focus large-size image, has a better capability of aberration correction, and can improve the projection imaging quality

Ultra-short-focus projection lens and laser projection equipment

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Ultra-short-focus projection lens and laser projection equipment