Method for Manufacturing Multi-Stage Compound Eye Lens

Abstract

A method for manufacturing a multi-stage compound eye lens includes the steps of manufacturing a micropillar array using a photoetching method, then sputtering ZnO on the surface of the micropillar array, jet printing an ultraviolet curing adhesive onto gaps in the micropillar array using a micro jet printing machine, and controlling the morphology of microlens using the number of droplet dropping instances to obtain a microlens array; further respectively dissolving hexamethyl tetramine and zinc nitrate in deionized water, then pouring the hexamethyl tetramine solution into the zinc nitrate solution to obtain a mixed solution, placing the microlens array into the mixed solution, and placing is in a water bath kettle for a water bath, and finally, removing the microlens array from the mixed solution, rinsing it with deionized water, and drying same to obtain the multi-stage compound eye lens.

Claims

1. A method for manufacturing a multi-stage compound eye lens, comprising the steps of: 1) manufacturing a micropillar array using a photoetching method: spin-coating a photoresist 4620 on a glass slide, wherein a spin-coating speed is 1500 r/s, wherein the glass slide is placed on a drying table for 5 minutes, and repeatedly spin-coating the photoresist on the glass substrate to obtain a microporous array with a thickness of 22 μm, which is a sample 1; after turning over the sample 1 twice by PDMS, obtaining a microporous array mold, which is a sample 2; pouring NOA61 UV-curable adhesive on PDMS of a surface of the sample 2, pressing it on a glass substrate, and then exposing it by a UV exposure machine for 100 s, and demolding the micro-pillar array with a height of 22 μm to obtain a sample 3; 2. sputtering 30 nm of ZnO on a surface of the sample 3 to obtain a sample 4, jet-printing an ultraviolet curing adhesive onto gaps in the micropillar array using a micro jet printing machine, and controlling a morphology of microlenses using the number of droplets, wherein the number of droplets is 2-12, wherein a sample 5 with a microlens array is obtained; 3. dissolving 7 g of hexamethyl tetramine and 14.87 g of zinc nitrate in deionized water respectively and stir for 20 minutes, then pouring hexamethyl tetramine solution into zinc nitrate solution, and mixing and stirring for 15 minutes to obtain a mixed solution, and placing the sample 5 into the mixed solution and placing it in a water bath at 90° C. for 80 minutes to obtain a sample 6; and 4. rinsing the sample 6 with deionized water for 2 minutes and dry it on a drying table at 60° C. for 50 minutes to obtain the multi-stage compound eye lens.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0011] FIG. 1 is an electron microscope image of a multi-stage compound eye lens according to a first embodiment of the present invention.

[0012] FIG. 2 is a structural view of the multi-stage compound eye lens in P1 portion of FIG. 1.

[0013] FIG. 3 is a structural view of the multi-stage compound eye lens in P2 portion of FIG. 1.

[0014] FIG. 4 is a structural view of the multi-stage compound eye lens in P3 portion of FIG. 1.

[0015] FIG. 5 is an imaging diagram of the multi-stage compound eye lens according to the first embodiment the present invention.

[0016] FIG. 6 is an electron microscope image of a multi-stage compound eye lens according to a second embodiment of the present invention.

[0017] FIG. 7 is an electron microscope image of a multi-stage compound eye lens according to a third embodiment of the present invention.

[0018] FIG. 8 is an electron microscope image of a multi-stage compound eye lens according to a fourth embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Embodiment 1: a method for manufacturing a multi-stage compound eye lens comprises the following steps.

[0021] 1) Manufacture a micropillar array using a photoetching method: Spin-coat a photoresist 4620 on a glass slide, wherein a spin-coating speed is 1500 r/s, wherein the glass slide is placed on a drying table for 5 minutes, and repeatedly spin-coat the photoresist on the glass substrate to obtain a microporous array with a thickness of 22 μm, which is a sample 1; after turning over the sample 1 twice by PDMS, obtain a microporous array mold, which is a sample 2; pour NOA61 UV-curable adhesive on PDMS of a surface of the sample 2, press it on a glass substrate, and then expose it by the UV exposure machine for 100 s, and demold the micro-pillar array with a height of 22 μm to obtain a sample 3.

[0022] 2) Sputter 30 nm of ZnO on a surface of the sample 3 to obtain a sample 4. Jet-print an ultraviolet curing adhesive onto gaps in the micropillar array using a micro jet printing machine. Control a morphology of microlenses using the number of droplets. The number of droplets is 12. A sample 5 with a microlens array is obtained.

[0023] 3) Dissolve 7 g of hexamethyl tetramine and 14.87 g of zinc nitrate in deionized water respectively and stir for 20 minutes. Then, pour the hexamethyl tetramine solution into the zinc nitrate solution, and mix and stir for 15 minutes to obtain a mixed solution. Place the sample 5 into the mixed solution and place it in a water bath at 90° C. for 80 minutes to obtain a sample 6.

[0024] 4) Rinse the sample 6 with deionized water for 2 minutes and dry it on a drying table at 60° C. for 50 minutes to obtain the multi-stage compound eye lens.

[0025] Referring to FIGS. 1, 2, 3 and 4, the multi-stage compound eye lens obtained by the embodiment has super hydrophobic properties, wherein when the droplet contacts the multi-stage compound eye lens, the droplet can be quickly separated from the multi-stage compound eye lens. The conventional lens with the superhydrophobic structure will affect its light transmittance. According to the method of the present invention, since the nanostructure and the micropillar array are fabricated in the microlens gap, such configuration will not affect the imaging of the compound eye lens, as shown in FIG. 5. This structure can significantly enhance the practical application of the compound eye lens.

[0026] Embodiment 2: The number of droplets in step 2) of the Embodiment 1 is changed to 2, wherein other steps are the same to obtain a multi-stage compound eye lens with the structure similar to that of Embodiment 1, as shown in FIG. 6.

[0027] Embodiment 3: The number of droplets in step 2) of the Embodiment 1 is changed to 4, wherein other steps are the same to obtain a multi-stage compound eye lens with the structure similar to that of Embodiment 1, as shown in FIG. 7.

[0028] Embodiment 4: The number of droplets in step 2) of the Embodiment 1 is changed to 8, wherein other steps are the same to obtain a multi-stage compound eye lens with the structure having triple-stage compound structure similar to that of Embodiment 1, as shown in FIG. 8.