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Diffusion plate, manufacturing method and projection system

A diffusion plate and normal direction technology, applied in the field of optics, can solve the problems of low uniformity of light field intensity and affect the quality of projected images, and achieve the effect of dissipating speckles, improving picture uniformity, and improving uniformity

Pending Publication Date: 2022-06-21
NINGBO SUNNY AUTOMOTIVE OPTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing micro-lens type diffusion plate has a small light field intensity uniformity after diffusing the incident light, thus affecting the quality of the projected image

Method used

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  • Diffusion plate, manufacturing method and projection system
  • Diffusion plate, manufacturing method and projection system
  • Diffusion plate, manufacturing method and projection system

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Embodiment Construction

[0038] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way.

[0039] The terminology used herein is for the purpose of describing particular example embodiments and is not intended to be limiting. When used in this specification, the terms "comprising", "comprising", "including" and / or "comprising" indicate the presence of stated features, integers, elements, parts and / or combinations thereof, but do not exclude The presence of one or more other features, integers, elements, components and / or combinations thereof.

[0040] This document is described with reference to schematic illustrations of exemplary embodiments. The exemplary embodiments disc...

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Abstract

The invention provides a diffusion plate, a manufacturing method and a projection system. The diffusion plate includes a substrate having a first plane; the micro lens array is arranged on the substrate and comprises a plurality of micro lenses arranged along the first plane; wherein an inclination angle formed by an optical axis of each microlens and a normal direction of the first plane is set according to a position of the microlens in the microlens array, and the inclination angles are different from each other. According to the diffusion plate, the manufacturing method and the projection system provided by the invention, the intensity uniformity of a diffused light field can be improved.

Description

technical field [0001] The present application relates to the field of optics, and more particularly, to a diffuser plate, a manufacturing method and a projection system. Background technique [0002] Optical diffuser is an optical device that uniformly distributes incident light intensity within a certain range of space. It is widely used in lidar, head-up display (HUD), assisted driving and other systems. Based on the different diffusion principles of incident light, it is mainly divided into two types: doped particle type and microstructure type. Compared with the traditional doped particle diffuser, the microstructure diffuser has good controllability in terms of diffusion angle, uniformity of light field intensity and clarity. [0003] In some HUD systems, the Image Generation Unit (PGU) projects the image onto the Diffuser and then onto the windshield. With the development of HUD technology, higher requirements are put forward for the resolution and clarity of the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02G02B3/00G03B21/20
CPCG02B5/0215G02B5/0278G02B3/0037G02B3/0012G03B21/208
Inventor 吴尚亮陈俊逸柴诚哲谢前森
Owner NINGBO SUNNY AUTOMOTIVE OPTECH