The Draper 48 x 74" First Surface Mirror without Frame for Rear Projection is frequently used in rear projection systems design to fold the light from the projector, reducing the required depth of the projection area behind the rear screen.
Conventional mirrors are not satisfactory for this purpose, because the reflective coating is on the backside of the glass. Under projection, the majority of light is reflected by the reflective coating, and a minority is reflected by the first surface of the mirror, resulting in an objectionable double image.
It should be mentioned that Draper also makes MiroClear, a superior quality, optionally available cleaning and restoration kit designed specifically for all first surface glass mirrors. MiroClear improves image quality, maintains new mirrors to the highest standards, brings new life to older mirrors, and restores reflectivity loss caused by dust, dirt, fingerprints and grimy build-up that accumulates and robs mirror of critical reflectivity.