Waveguide display grating coupler with natural vignetting compensation effect

The invention discloses a waveguide display grating coupler with a natural vignetting compensation effect, and the waveguide display grating coupler consists of an image source (101), a collimating lens (102), a grating coupler (103), a grating output device (104) and a waveguide (105), wherein light waves emitted by the image source (101) are collimated by the collimating lens (102) to form incident light, the incident light entering the grating coupler (103) is subjected to amplitude phase modulation, propagates in the waveguide (105) in a total reflection mode, reaches the grating output device (104), and is finally coupled out of the waveguide (105). The diffraction efficiency distribution of the waveguide display grating coupler maintains high efficiency and large field angle coupling, has good natural vignetting compensation effect, and can be used in a waveguide display system. 本发明公开了一种具有自然渐晕补偿效果的波导显示光栅耦合器，所述光栅耦合器由像源(101)、准直透镜(102)、光栅耦合器(103)、光栅输出器(104)和波导(105)组成，其中：所述像源(101)发出的光波经过所述准直透镜(102)准直后形成入射光，