The present optical imaging device comprises an electro-optical recording device, such as a digital still camera, videotape recorder, etc, physically and optically connected to the scope sight of a firearm. The scope may be provided with a half silvered mirror at the eyepiece, which reflects a portion...http://www.google.fr/patents/US6539661?utm_source=gb-gplus-shareBrevet US6539661 - Optical imaging device for firearm scope attachment
Optical imaging device for firearm scope attachment