Dual-purpose optical lens module for projection and camera shooting

The invention provides an optical lens module for projecting and camera shooting, comprising digital microlens device (DMD) chip connected with projection lamp; zoom towards the projection screen, wherein the DMD chip can reflect the light from the projection lamp to zoom and finally the light is projected on the projection screen to implement projecting; photosignal collecting module, wherein the image of outside scene taken by the zoom is subjected to DMD chip to change optical path, finally the imaging is performed on the photosignal collecting module. The optical lend module has two function of projecting and camera shooting by combining the projecting function optical path with the camera shooting function optical path with features of compact structure and high space availability. The optical lens module can be widely used in a variety of products which have limited mounting space and need function of projecting and camera shooting.