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Color microlens array and preparation method for same

A micro-lens array and color technology, applied in the optical field, can solve problems such as increasing the complexity of the system, and achieve the effects of reducing the loss of light energy, improving the imaging quality, and reducing the complexity and cost of the system

Active Publication Date: 2013-06-19
GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If you want to image a certain monochromatic light, you need to combine it with a special filter, so there is a problem of alignment between the filter and the microlens array, which increases the complexity of the system. restricted

Method used

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  • Color microlens array and preparation method for same
  • Color microlens array and preparation method for same
  • Color microlens array and preparation method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Embodiment 1 of the present invention provides a method for preparing a color microlens array, see figure 1 , figure 2 , the method specifically includes the following steps:

[0056] Step 101: Provide a base.

[0057] Preferably, a piece of glass with high light transmittance and flat surface is used as the substrate 1 .

[0058] Specifically, the substrate was cleaned with water and acetone, and then placed in an oven and baked at 130°C for 10 minutes to remove water vapor and residual acetone; after baking, oxygen plasma treatment was performed to increase the surface energy of the glass. .

[0059] Preferably, the vacuum degree of the oxygen plasma treatment is 25Pa, the power is 60W, and the bombardment time is 90 seconds.

[0060] Step 102: Prepare a photoresist microlens array master on the substrate by hot-melt process.

[0061] Specifically, the positive photoresist 2 is spin-coated on the cleaned substrate, and after baking, the substrate with the photor...

Embodiment 2

[0084] Embodiment 2 of the present invention provides a color microlens array, see figure 2 , the microlens array includes another substrate 9 , red photoresist 10 and microlenses 12 which are sequentially stacked and connected.

[0085] Specifically, take another substrate 1, spin-coat a layer of red photoresist 10 with a certain thickness on the other substrate 1, and bake in a vacuum oven at 80° C. for 2 minutes to form a red photoresist substrate; The prepared polydimethylsiloxane (PDMS) soft stamp and the red photoresist substrate were preheated on a baking table at 90°C for 3 minutes; the polydimethylsiloxane (PDMS) soft stamp was pressed on the red On the photoresist, put a flat weight of 0.5kg on the polydimethylsiloxane (PDMS) soft seal, so that the polydimethylsiloxane (PDMS) soft seal is pressed into the softened red photoresist Medium; keep 90°C and heavy object pressure for 1 minute and then cool naturally; bake and cure the exposed red photoresist at 230°C for ...

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Abstract

The invention discloses a color microlens array and a preparation method for the same, and belongs to the field of optics. The preparation method comprises the following steps of: providing a substrate; preparing a microlens array master mask on the substrate by using a hot melting process; covering the master mask by using polydimethylsiloxane viscous fluid to prepare a polydimethylsiloxane soft seal with a concave microlens array; copying a microlens array structure on the polydimethylsiloxane soft seal on a color photoresist of another substrate to prepare a microlens array; and repeating the steps, and preparing microlens arrays in different colors by using different color photoresists. The polydimethylsiloxane and the color photoresists are used, and an optical filter structure of the conventional multi-spectrum imaging system is eliminated, so that light energy loss is reduced, imaging quality is improved, and the problems of alignment integration of the optical filter and the microlens array are solved; and the microlens arrays in different colors are integrated and applied to realize monochromatic imaging and color reconstruction in the multi-spectrum imaging system, so that system complexity and cost are greatly reduced.

Description

technical field [0001] The invention relates to the field of optics, in particular to a color microlens array and a preparation method thereof. Background technique [0002] The microlens array is an array composed of lenses with a clear aperture and a relief depth of micron. It not only has the basic functions of traditional lenses such as focusing and imaging, but also has the characteristics of small unit size, high integration, and multi-channel. It enables it to complete the functions that traditional optical components cannot complete, and can form many new optical systems. [0003] In some practical applications, sometimes people only care about the imaging of a certain monochromatic light. For example, what needs to be concerned about in human blood vessel imaging is the image formed by blue light, which requires the use of multispectral imaging systems. People use the combination of multi-channel integrated color filter and micro-lens array, and use the multi-chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/00G03F7/00
Inventor 金建邸思姚豫培陈贤帅杜如虚
Owner GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI