3D Postcard Stereograph Viewer

This little gizmo is used to view stereoscopic images on a postcard-sized printout. The centers of the two images should be 64mm apart for optimal results (that's the interpupillary distance this was designed for). The lenses I used were 35.5mm in diameter

Only one place needs glue: the interface between the viewer and the slider. Align the bottom edge of the viewer with the curve of the slider (make sure it's centered) and use strong adhesive to bond them together. Otherwise, just print