Composite collimation device and system for micro projection
A micro-projection and collimation technology, applied in the field of projection, can solve problems such as affecting the collimation effect and amplifying the assembly tolerance of the system, and achieve the effects of facilitating manufacturing, increasing tolerance redundancy, and reducing manufacturing costs.
Inactive Publication Date: 2020-08-21
SHENZHEN EVIEWTEK TECH CO LTD
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Problems solved by technology
If a combination of several glass lenses is used, it will pose a huge challenge to the size constraints of the system. In addition, the superposition of multiple glass lenses will also enlarge the assembly tolerance of the system
If a glass lens is used and an aspheric lens made of plastic material or glass material is reused, this combination will be beneficial to the volume reduction of the light source collimation system, but the production cost of the glass aspheric lens and the thermal stability of the plastic material will become the source of the light source. Problems that are difficult to avoid during the use of the collimation system affect the collimation effect
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[0032] The following will clearly and completely describe the technical solutions of the embodiments of the present application with reference to the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the embodiments of the present application.
[0033] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer " and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the descr...
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The invention discloses a composite collimating device for micro projection, and relates to the technical field of projection. The device comprises a spherical collimating lens and a gradient refractive index lens, the spherical collimating lens and the gradient refractive index lens are rotationally symmetrical along the center of the main optical axis of the composite collimating device; the spherical collimating lens is used for pre-collimating a first light field output by an LED light source; and the gradient refractive index lens is used for adjusting a second light field output by the spherical collimating lens so as to balance high-order aberration light in the second light field. The collimation effect is good; the gradient refractive index lens is easy to form surface bearing with a corresponding structural member, so that tolerance accumulation near the gradient refractive index lens can be greatly reduced, tolerance redundancy is increased, and manufacturing is facilitated;the number of used whole lenses can be reduced, use of aspheric lenses is avoided, the manufacturing cost is reduced, and the whole size can be well restrained. A composite collimation system for micro projection is also provided.
Description
technical field [0001] The present application relates to the field of projection technology, in particular to a compound collimation device and system for micro projection. Background technique [0002] With the maturity of projection technology, projection equipment is used in more and more fields, such as home audio-visual, advertising projection, industrial projection inspection, etc. Among them, the demand for projection equipment with small size, high brightness and high resolution is also becoming stronger. It is the goal of major projection equipment manufacturers to manufacture projection optics lenses with smaller size, better image quality, and lower cost. [0003] The micro-projector includes technologies in cross-fields such as opto-mechanical electronics as the bottom layer; the final imaging effect of projection is not only closely related to the imaging lens, but also closely related to the lighting system of the micro-projector. The lighting system of the ...
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IPC IPC(8): G03B21/20G02B27/30
CPCG02B27/30G03B21/20
Inventor 魏威许礼强邹思源姜玥伊贺银波
Owner SHENZHEN EVIEWTEK TECH CO LTD