Blazed grating technology visible light color changing spectacle lens and production method thereof

Abstract

The invention provides a blazed grating technology visible light color changing spectacle lens and a production method thereof. The blazed grating technology visible light color changing spectacle lens comprises a base layer and an alternate lamination layer formed on the base layer, wherein the alternate lamination layer comprises a high-refractive-index material film layer and a low-refractive-index material film layer; and sawtooth-shaped gradient blazed angle type transmission body blazed diffraction grating grooves are formed in the alternate lamination layer.

Description

technical field [0001] The invention relates to a spectacle lens with blazed grating technology visible light discoloration and a preparation method thereof. Background technique [0002] A grating is an important core device for high-resolution imaging spectroscopy. In practical applications, in order to concentrate as much light energy as possible on a specific diffraction order, most of the energy diffracted by the grating grooves will be converted from zero order to The main maximum direction (or the geometric optical propagation direction of light) is transferred to the required order, so that most of the light energy can be concentrated on the predetermined diffraction order; when detected from this direction, the intensity of the spectrum is the largest, and this The phenomenon is called blazed; the corresponding such grating is called blazed grating. The blaze greatly improves the diffraction efficiency of the grating. [0003] A blazed grating is an optical elemen...

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Problems solved by technology

[0006] Mechanical scribing: using a diamond scribing knife to scribe a blazed grating on the substrate material, but the life of the diamond scribing knife must be controlled to control the wear and precision, and it needs to be replaced regularly and the cost is very expensive. This method of mechanical scribing grating must be used very Expensive ultra-precision processing equipment with poor fineness and stability and prone to displacement errors (ghost lines), the accuracy of the grating's equal pitch / variable pitch / inclination slope / sagittal direction / curvature or grating groove depth is unstable , the surface roughness and surface shape errors are large, not only prone to ghost lines / stray light / abnormal dispersion, resulting in color distortion of the field of view, but also seriously reducing the diffraction efficiency;

[0007] Electron beam etching: use the chemical process of controlling the exposure dose to directly write the photoresist with electron beam. The photoresist undergoes a series of complex chemical processes such as deposition, exposure, development, and etching to form a blazed grating. The production process includes the concentration of the developer And temperature, development time, post-baking temperature and time, chemical cleaning, etc., the production process is numerous and complex, and the nanometer parameters are difficult to accurately control, especially the chemical etching process is likely to cause serious environmental pollution problems, resulting in higher costs in the future. Expensive post-processing costs, and there are seam errors, precision errors, and groove shape errors between adjacent areas;

[0008] Ion beam etching: A series of complex chemical process technologies such as deposition, exposure, development, and etching of photoresist are used to form a surface relief photoresist grating mask on the substrate, and then Argon argon is performed on this grating mask. Ion beam etching, using the shielding effect of the mask on the ion beam, sputters the material to remove the photoresist, so that different positions of the substrate are etched successively to obtain a grating groove shape on the substrate. The production process includes the concentration of the developer And temperature, development time, post-baking temperature and time, chemical cleaning, etc., the production process is numerous and complex, and the nanometer parameters are difficult to accurately control, especially the chemical etching process is likely to cause serious environmental pollution problems, resulting in higher costs in the future. Expensive post-processing costs, the disadvantage of the grating is that the accuracy of the groove shape and the accuracy of the blaze angle are not easy to control

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