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Calculation method and control method for coating film strain of ultra-thin lens, and ultra-thin lens

A technology of control methods and calculation methods, applied in computer material science, design optimization/simulation, special data processing applications, etc., can solve problems such as optical focusing and divergence, and performance degradation of optical components, and achieve the effect of solving technical obstacles

Active Publication Date: 2022-02-08
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, for substrates with a thickness of 0.1mm (and below), the stress generated by infrared optical coating technology is enough to cause significant strain, so that the final optical lens presents a certain curvature
The curvature of the lens will cause the optics transmitted or reflected by the lens to focus and diverge, and eventually lead to a decrease in the overall performance of the optical element

Method used

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  • Calculation method and control method for coating film strain of ultra-thin lens, and ultra-thin lens
  • Calculation method and control method for coating film strain of ultra-thin lens, and ultra-thin lens
  • Calculation method and control method for coating film strain of ultra-thin lens, and ultra-thin lens

Examples

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Effect test

Embodiment 1

[0040] Embodiment 1 provides a method for calculating the coating strain of an ultra-thin lens, comprising the following steps:

[0041] Step A1, the first required for ultra-thin lenses For each film layer material, the relationship model between its coating stress and thickness is obtained; , n is the number of film layers required for the ultra-thin lens.

[0042] Among them, the film material required for ultra-thin lenses is determined according to the optical property requirements required by the product, and is responsible for forming specific spectral properties in the product.

[0043] The relationship between the thickness and strain of coating materials in different film systems has a certain degree of nonlinear dependence. Therefore, in this embodiment, for each film layer material, the relationship model between its coating stress and thickness is established as:

[0044]

[0045] In the formula, F and d represent the coating stress and thickness of an...

Embodiment 2

[0057] Embodiment 2 provides a method for controlling the coating strain of an ultra-thin lens, comprising the following steps:

[0058] Step B1, using steps A1 to A3 in the method described in Example 1, to solve the stress of the coating layer of the ultra-thin lens ;

[0059] Step B2, designing a metal oxide film layer, the vector sum of its coating stress and the stress of the coating layer of the ultra-thin lens is less than the preset stress threshold;

[0060] Step B3, during the coating process of the ultra-thin lens, adding the designed metal oxide film layer to the coating layer of the ultra-thin lens.

[0061] In a more optimal solution, when designing the metal oxide film layer in step B2: first preselect a metal oxide material, and calculate the relationship between the coating stress and the thickness of the metal oxide film layer material according to the same method as in step A1 in Example 1. Then input the stress value opposite to the stress of the coating...

Embodiment 3

[0064] Embodiment 3 provides an ultra-thin lens, a lens with a thickness not greater than 0.1mm, including a substrate, a metal oxide film layer and several existing film layers, the metal oxide film layer is located between the substrate and the existing film layers, the The vector sum of coating stresses of the metal oxide film layer and all existing film layers is less than a preset stress threshold. Wherein, the metal oxide film layer is designed and obtained by adopting the method for controlling the coating strain of the ultra-thin lens described in Embodiment 2.

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Abstract

The invention discloses a calculation method and a control method for the coating film strain of an ultra-thin lens, and the ultra-thin lens. The coating film strain calculation method comprises the following steps of: obtaining a relation model between coating film stress and thickness of a film layer material required by an ultra-thin lens, calculating the corresponding coating film stress according to the thickness required by each film layer, and calculating the stress of the coating layer of the ultra-thin lens according to an improved stoneley formula so as to obtain the strain of the coating layer on a substrate. The coating film strain control method comprises the steps of: designing a metal oxide film layer based on the coating film layer stress of an ultra-thin lens, and adding the designed metal oxide film layer into the coating film layer of the ultra-thin lens to control the coating film stress, the vector sum of the coating film stress and the coating film layer stress being smaller than a preset stress threshold. According to the invention, the strain of the ultra-thin lens in the film coating process can be predicted and controlled, and the ultra-thin lens without strain after film coating is obtained.

Description

technical field [0001] The invention belongs to the technical field of optical thin films, and in particular relates to a calculation method and a control method for coating strain of an ultra-thin lens, and an ultra-thin lens. Background technique [0002] Optical coating is the process of coating various optical films on optical glass by using a vacuum coating machine. The role of optical films in the optical system is very important. Fraunhofer made the first batch of anti-reflection coatings as early as 1827. He etched half of the finely polished flat glass in concentrated sulfuric acid or concentrated nitric acid to form anti-reflection coatings. In the mid-1930s, Bauer in Germany and Strong in the United States successively prepared single-layer anti-reflection coatings by vacuum evaporation. This simple anti-reflection coating is still widely used in general optical devices. [0003] When the light hits the interface of two transparent media, if the light shoots from...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/10G06F30/20G16C60/00G06F119/14
CPCG02B1/10G06F30/20G16C60/00G06F2119/14
Inventor 潘安练范鹏
Owner HUNAN UNIV
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