Fresnel lens device

A Fresnel lens, transparent substrate technology, applied in instruments, nonlinear optics, optics, etc., can solve problems such as single light-gathering effect and limited application

Active Publication Date: 2016-12-14
BOE TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the Fresnel lens in the prior art can only play a single light-gather

Method used

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Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0037] figure 1 It is a structural schematic diagram of a Fresnel lens device provided by an embodiment of the present invention, see figure 1 , the device comprises: a first transparent substrate 100, a second transparent substrate 200, and a liquid crystal layer 300 filled between the first transparent substrate 100 and the second transparent substrate 200; the first transparent substrate 100 is a Fresnel lens 100, and The side of the Neel lens 100 facing the liquid crystal layer 300 is provided with grooves 101 distributed according to Fresnel zone intervals; the second transparent substrate 200 is used to control the state of the liquid crystal 301 in the liquid crystal layer 300, so that the polarized light incident on the liquid ...

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Abstract

The invention discloses a Fresnel lens device, belonging to the technical field of optical devices. The device comprises a first transparent substrate, a second transparent substrate and a liquid crystal layer filled between the first and second transparent substrates, wherein the first transparent substrate is a Fresnel lens; grooves distributed at intervals according to a Fresnel zone are formed in the side, facing the liquid crystal layer, of the Fresnel lens; the second transparent substrate is used for controlling the states of liquid crystals in the liquid crystal layer to enable the refractive index of the polarized light entering the liquid crystals when passing through the liquid crystals to switch between the first refractive index of the liquid crystals and the second refractive index of the liquid crystals; the first refractive index is greater than the second refractive index; the refractive index of the Fresnel lens is equal to the first refractive index of the liquid crystals in the liquid crystal layer. The device has the beneficial effect that switching of the function of the Fresnel lens between condensation and transmission is achieved by controlling the states of the liquid crystals with the second transparent substrate.

Description

technical field [0001] The invention relates to the technical field of optical devices, in particular to a Fresnel lens device. Background technique [0002] Lens is a common optical device in optical equipment. With the development of optical technology, the requirements for lenses are getting higher and higher. Fresnel lens is widely used in various optical devices as a kind of lens with small size, light weight and easy replication. [0003] The Fresnel lens in the existing optical equipment can only play a single concentrating role. In some application scenarios, for example, when Fresnel lenses are used to realize solar energy concentrating and heat concentrating, the temperature needs to be adjusted. If Fresnel The lens always plays the role of concentrating light, so it can only be continuously heated, and it is difficult to realize temperature control. Therefore, the application of the existing Fresnel lens has certain limitations. Contents of the invention [00...

Claims

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Application Information

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IPC IPC(8): G02F1/13G02F1/1343
CPCG02F1/1313G02F1/134309G02F1/133371G02F1/29G02F1/133526G02F1/133368
Inventor 高健董学陈小川杨亚锋王维谭纪风孟宪东
Owner BOE TECH GRP CO LTD
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