Manufacturing method of tunable filter based on volume holographic grating

The invention relates to an optical filter, in particular to a manufacturing method of a tunable filter based on a volume holographic grating, which is characterized in that the wavelength tunability of the tunable filter is realized by manufacturing the volume holographic grating with a continuously changing grating period in different areas of the tunable filter based on the volume holographic grating; according to the technical scheme provided by the invention, the defects of complex exposure process and low tunable resolution in the prior art can be effectively overcome. 本发明涉及光学滤波器，具体涉及一种基于体全息光栅的可调谐滤波器的制作方法，基于体全息光栅，通过在可调谐滤波器的不同区域制作连续变化的光栅周期的体全息光栅，实现可调谐滤波器的波长可调谐性；本发明提供的技术方案能够有效克服现有技术所存在的曝光过程复杂、可调谐分辨率较低的缺陷。