Novel Fresnel lens and manufacturing process thereof

A Fresnel lens, a new type of technology, applied in the field of optical lenses, can solve the problems of the change of the focal length of the Fresnel lens, poor practicability, etc.

Pending Publication Date: 2021-11-23
邓景月
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Once the existing Fresnel lens is produced and shaped, it cannot change the focal length, and it becomes a fixed Fresnel lens when it is installed and applied to the product, which is poor in practicability. Therefore, the present invention proposes a new type of Fresnel lens

Method used

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  • Novel Fresnel lens and manufacturing process thereof
  • Novel Fresnel lens and manufacturing process thereof
  • Novel Fresnel lens and manufacturing process thereof

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] refer to Figure 1 to Figure 4 , a novel Fresnel lens, including a housing 1 and a lens body 2 located in the housing 1, the lens body 2 includes a cavity made of two ITO conductive film layers 3, the cavity has A circular optical device formed by photocuring, the optical device is composed of several fan-shaped liquid crystal-rich layers 4 and several fan-shaped polymer-rich layers 5, the liquid crystal-rich layer 4 and the polymer-rich layer 5 are ar...

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Abstract

The invention discloses a novel Fresnel lens and a manufacturing process thereof. The manufacturing process comprises the following steps: filling a cavity formed by an ITO conductive film and an ITO conductive layer with a liquid crystal polymer mixed material to form a semi-finished product; building a set of turntable capable of automatically rotating clockwise, and fixing the compounded semi-finished product on a turntable platform; fixing an exposure interference slit film with a notch and a double-slit interference cover plate on the turntable; after the turntable rotates by 361 degrees, producing a perfect novel Fresnel lens, and curing and forming the liquid crystal polymer mixture through ultraviolet rays; connecting the ITO conducting film and the ITO conducting layer with a power module through a flexible printed circuit (FPC); and attaching the anti-UV optical film to the surface of the lens. The structure is simple, the voltage applied between the two ITO conductive film layers 3 is adjusted, liquid crystal molecules are controlled to rotate by a certain angle, the incident angle of incident light is changed, and thus focal length adjustment of the lens is achieved.

Description

technical field [0001] The invention relates to the technical field of optical lenses, in particular to a novel Fresnel lens and a manufacturing process thereof. Background technique [0002] The Fresnel lens is mostly a thin sheet made of polyolefin material. One side of the lens surface is smooth, and the other side is engraved with concentric circles from small to large. The Fresnel lens is equivalent to the infrared and visible light convex lens in many cases, and the effect is better, but the cost is much lower than the ordinary convex lens. Fresnel lenses can be classified according to optical design or structure. The Fresnel lens has two functions: one is focusing; the other is to divide the detection area into several bright areas and dark areas, so that moving objects entering the detection area can pass through the PIR (Passive Infrared Detector) in the form of temperature changes. ) produces changes in pyro-infrared signals. [0003] Once the existing Fresnel l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/08G02F1/13G02F1/29
CPCG02B3/08G02F1/1313G02F1/294
Inventor 邓景月
Owner 邓景月
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