Annular micro-fold optical lens and preparation method thereof

An optical lens and wrinkle technology, which is applied in the field of annular micro-folded optical lens and its preparation, can solve the problems of high processing cost of diffractive optical elements, difficulty in making large-area lenses, and large-area lenses and heavy weight, etc., and achieves light weight and low cost. The effect of processing cost and weight

Inactive Publication Date: 2012-11-21
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an annular micro-wrinkled optical lens and its preparation method, which is used t...

Method used

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  • Annular micro-fold optical lens and preparation method thereof
  • Annular micro-fold optical lens and preparation method thereof
  • Annular micro-fold optical lens and preparation method thereof

Examples

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Embodiment 1

[0040] see Figure 2~Figure 6b , the present embodiment provides a method for preparing an annular micro-wrinkled optical lens, the preparation method at least comprising:

[0041] Such as Figure 2~Figure 3b As shown, step 1) S11 is first performed, providing a substrate 102 with holes 1021 of a predetermined shape and a predetermined size on the surface and a soft material film 101, and fixing the soft material film 101 on the surface of the substrate 102, And make the soft material film 101 cover the hole 1021 .

[0042] The substrate is a glass substrate, and the hole 1021 of the substrate 102 is a circular hole with a diameter of 0.1 to 200 cm. In this embodiment, the diameter of the circular hole is 1.4 cm. 101 is fixed on the surface of the base 102. Of course, in other embodiments, the hole 1021 can be polygonal, rounded polygonal or any expected shape, and its size can also be determined according to actual needs. Larger or smaller size holes 1021 are used to prepare...

Embodiment 2

[0059] see Figure 6a~6b , as shown in the figure, this embodiment provides an annular micro-wrinkled optical lens, at least including: a soft material film 101, the surface of which has a predetermined period of annular micro-wrinkles 104; a hard material film 103, combined with the soft material film 101 surface, which has the same annular microfold 104 as the period of the soft material film 101, its cross-sectional view is as follows Figure 6a As shown, the top view is as Figure 6b shown.

[0060] In this embodiment, the soft material film 101 is a polydimethylsiloxane film, and the hard material film is a gold film 103 . Of course, in other embodiments, the soft material film 101 and the hard material film 103 different from the present embodiment can be selected to meet the required requirements.

[0061] The preset period T (the distance between the valley peaks or valley bottoms of two adjacent annular microfolds) is 0.2-30 μm. In this example, it is 2 μm.

[00...

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Abstract

The invention provides an annular micro-fold optical lens and a preparation method thereof, and belongs to the field of optics and micromachining. The preparation method is completed by the following steps of: firstly preparing a soft material film; fixing the soft material film on a substrate with a hole, and then pulling or pushing the film through the preset position of the hole to form a conical structure; and depositing a hard material film on the surface of the conical structure or hardening the surface of the conical structure and then stopping pulling or pushing, to form periodical annular micro-folds on the surface of the soft-hard two-layer film. The annular micro-fold optical lens provided by the invention has similar optical performance to the conventional pyramidal lens; the optical parameters (such as convergence angle, divergence angle and focal length) of the lens can be conveniently adjusted by controlling the process parameters of the preparation method; and compared with the conventional pyramidal lens, the annular micro-fold optical lens has huge advantages due to the characteristics of extremely-thin thickness, extremely-light weight, flexibility and low processing cost as well. The process for preparing the annular folds can also be applied to prepare optical lenses of large size and is suitable for batch fabrication.

Description

technical field [0001] The invention belongs to the field of optics and micro-processing, in particular to an annular micro-wrinkle optical lens and a preparation method thereof. Background technique [0002] In the soft-hard double-layer film, if shrinkage stress is introduced in the soft film part, because the hard part is difficult to shrink, the soft-hard double-layer film structure will buckle and form a sinusoidal micro-wrinkle structure. In recent years, researchers mainly use PDMS (polydimethylsiloxane, polydimethylsiloxane) as the matrix. This material has the characteristics of transparency under visible light, high elastic rubber-like appearance at room temperature, stable chemical properties, non-toxicity, simple production, and low cost under normal conditions, so it has been widely used in the field of microelectronic device structure and packaging. Generally, there are two methods for fabricating thin films on PDMS substrates and producing large-scale microst...

Claims

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Application Information

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IPC IPC(8): G02B1/10
Inventor 杨天陈冷易会李冉
Owner SHANGHAI JIAO TONG UNIV
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