利用阿贝成像原理制作低频全息光栅

Fabrication of low frequency holographic grating by using the Abbe imaging principle

依据阿贝成像原理,相干光照明下的物通过透镜成像,当频谱有所丢失时,像就不完全与物相似,由此使黑白光栅在相干光照明下通过透镜成像,在频谱面上设置光阑,仅让±1级衍射光通过,这样在像平面就得到全息光栅,通过改变成像横向放大率能够达到改变全息光栅的空间频率的目的.

When imaging an object through lens in coherent light illumination, the losses of the spectrum information will reduce the comparability of the image according to the Abbe imaging principle. Thereby, when a black-and-white grating is imaged through lens in coherent light illumination, and an aperture is placed on the rear focus plate, only the ±1 order diffracted beams can pass, then a holographic grating can be obtained on the image plate. Using this method, the spatial frequency is changed by changing the transverse magnifying power.