Preparation method of transmission type filter array based on volume holographic grating

The invention relates to a filter, in particular to a preparation method of a transmission type filter array based on a volume holographic grating, which comprises the following steps of: performing regional exposure treatment on a transmission type volume holographic material by adopting a same-side interference exposure method to form a plurality of sub-filters with different filtering curves so as to form the filter array; wherein the difference between the filtering curves of the sub-filters is reflected in the difference of valley value wavelength, valley value number and valley value efficiency; according to the technical scheme, the defects that in the prior art, a plurality of sub-filters with large filtering curve differences cannot be obtained, the technological process is tedious, and the preparation cost is high can be effectively overcome. 本发明涉及滤波器，具体涉及一种基于体全息光栅的透射型滤波器阵列的制备方法，采用同侧干涉曝光的方法在透射型体全息材料上进行分区域曝光处理，形成多个具有不同滤波曲线的子滤波器，组成滤波器阵列；其中，各子滤波器的滤波曲线之间的差异性体现在谷值波长、波谷数量和谷值效率的不同；本发明提供的技术方案能够有效克服现有技术所存在的无