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Optical film of multilayer structure

A technology of optical thin film and multi-layer structure, applied in the field of communication materials, can solve the problem of poor light directivity, and achieve the effect of high transmittance, improved directivity, and enhanced reflection efficiency

Active Publication Date: 2019-11-05
SHENZHEN LONGLI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the incident light enters these multi-microlayer structure materials, it passes through a series of light refraction and reflection, and the outgoing light diverges in a large spatial range, which makes the light directivity poor.

Method used

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  • Optical film of multilayer structure
  • Optical film of multilayer structure

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Please refer to figure 1 , is a cross-sectional view of the multilayer optical film in Example 1 of the present invention, which includes a stack of four positive refractive index microlayers 101, 102, 103, 105 and one negative refractive index microlayer 104. The upper surface of the positive refractive index microlayer 101 is the first surface, and the lower surface of the positive refractive index microlayer 105 is the second surface. In Example 1 of the present invention, the effect of L1 light passing through the multi-layer stack with different positive refractive index microlayers and negative refractive index microlayers is as follows: figure 1 shown. The negative index microlayer 104 exhibits a negative index of refraction nr for visible light. The first surface that is arranged in parallel and the second surface on the opposite side pass the refractive index n of 3 positive refractive index microlayers 101, 102, 103 1 , n 2 , n 3 Decreasing in turn, the r...

Embodiment 2

[0031] Please refer to figure 2 , is a cross-sectional view of the multilayer optical film of Example 2 of the present invention. The similarities and differences between Example 2 and Example 1 will be described below. figure 2 The structure of the multilayer optical film comprises five layers of positive refractive index microlayers 201, 202, 203, 205, 206 and one layer of negative refractive index microlayers 204. The upper surface of the positive refractive index microlayer 201 is the first One surface, the lower surface of the positive refractive index microlayer 206 is the second surface. In Example 2 of the present invention, the effect of light L1 passing through a multilayer stack with different positive refractive index microlayers and negative refractive index microlayers is as follows: figure 2 shown. The negative index microlayer 204 exhibits a refractive index nr for visible light. The first surface arranged in parallel and the second surface on the opposi...

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Abstract

The invention discloses an optical film of a multilayer structure. The optical film comprises a first surface, a second surface arranged in parallel in the opposite side of the first surface, and a stack of N positive-refractive-index micro layers, the stack of N positive-refractive-index micro layers is arranged between the first and second surface and are set as adjacent micro layers, the refractive indexes of the N-1 positive-refractive-index micro layers are decreased successively from the first surface to the second surface, the refractive index of the N th positive-refractive-index microlayers is greater than that of the (N-1)th positive-refractive-index micro layer, at least one negative-refractive-index micro layer is arranged among the Nth positive-refractive-index micro layer from the first surface to the second surface, so that the optical film of the multilayer structure has a high reflectivity for incident light from the first surface to the second surface and high transmittance for incident light from the second surface to the first surface.

Description

technical field [0001] The invention relates to the field of communication materials, in particular to a multilayer optical film with a single-side reflection function. Background technique [0002] Multilayer structured optical films can contain thin layers of various light-transmitting materials. These layers are called microlayers because they are thin enough that the reflective and transmissive properties of the optical film are largely determined by reflection at the microlayer interface. Determined by constructive and destructive interference of light. Multilayer structured optical films have specific reflective and transmissive properties depending on the amount, if any, of birefringence exhibited by each microlayer, and the relative refractive index differences of adjacent microlayers, among other design characteristics. In some cases, multilayer structured optical films can act as reflective polarizers, such as reflectors in other cases. [0003] In some cases, th...

Claims

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Application Information

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IPC IPC(8): G02B5/00G02B5/08
CPCG02B5/00G02B5/0808
Inventor 张小齐刘政曾晓虎黄小芸
Owner SHENZHEN LONGLI TECH CO LTD
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