Method for preparing continuous surface-shaped Fresnel lens
A Fresnel lens, surface shape technology, applied in the direction of lens, optics, instruments, etc., can solve the problems of low surface roughness, high cost, small aperture, etc. effect of machining, low surface roughness
Active Publication Date: 2020-07-31
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is: to overcome the problems of small caliber, high cost and low efficiency of the traditional technology, and realize the production of continuous surface Fresnel lenses with a diameter of more than tens of millimeters and a lower structural surface roughness. The present invention provides a A kind of method for preparing continuous surface Fresnel lens
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[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0021] The invention discloses a method for preparing a continuous surface Fresnel lens, which comprises two steps, namely making a continuous surface Fresnel lens master plate and continuous surface Fresnel lens casting replication. Specifically, it includes ring-shaped groove mold 1, ultraviolet curing glue dripping 2, ultraviolet curing glue rotating and curing 3, continuous surface-shaped master plate 4, glue casting and curing 5, and continuous surface-shaped Fresnel lens 6. The working process is to first process the ring groove mold 1, and then complete the dripping of UV curing glue 2 in the ring groove mold, so that the UV curing glue fills all the grooves, and then put it on the centrifuge to rotate , and at the same time apply ultraviolet radiation above to realize the rotation curing of the ultraviolet curing adhesive 3. The cured ...
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The invention provides a method for preparing a continuous surface-shaped Fresnel lens. The method comprises the steps: manufacturing a continuous surface-shaped Fresnel lens mother set and carrying out tape casting and copying on the continuous surface-shaped Fresnel lens. The method specifically comprises the following steps: an annular groove mold, ultraviolet curing glue dripping, ultravioletcuring glue rotary curing, a continuous surface-shaped mother set, glue solution tape casting curing and a continuous surface-shaped Fresnel lens. The working process comprises the following steps: firstly, processing the annular groove mold, then dripping ultraviolet curing adhesive into the annular groove mold to fill all grooves with the ultraviolet curing adhesive, then placing the annular groove mold on a centrifugal machine for centripetal rotation, and applying ultraviolet radiation above the annular groove mold until the ultraviolet curing adhesive is completely cured. The cured ultraviolet glue becomes the continuous surface-shaped mother set, polymer glue is poured on the surface of the mother set and cured, and the continuous surface-shaped Fresnel lens is formed after demolding. According to the method, the problems of small aperture, high cost, low efficiency and the like in the prior art are solved, and the continuous surface-shaped Fresnel lens with the aperture of dozens of millimeters or above and low structural surface roughness is manufactured.
Description
technical field [0001] The invention belongs to the field of optical microprocessing, and in particular relates to a method for preparing a continuous surface Fresnel lens. Background technique [0002] In the processing technology of the continuous surface Fresnel lens master, grayscale photolithography or single-point diamond cutting is generally used. Among them, grayscale lithography cannot process deeper structures due to the inherent characteristics of the process, and is limited by the amount of mask data. Generally, the aperture can only be a few millimeters to tens of millimeters. Single-point diamond cutting is limited by the hardness of the material. It can only be processed on the surface of soft metal materials, and the surface of the structure produced has a high roughness, which will cause a large energy loss in optical applications. Whether it is grayscale lithography or single-point diamond cutting, there are problems of high cost and low efficiency. Cont...
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IPC IPC(8): G02B3/00
CPCG02B3/0012G02B3/0031
Inventor 高国涵杜俊峰边疆范斌刘盾罗倩石恒汪利华刘鑫张福
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI