An ocular imaging system for use with a surgical laser device comprises a light source radiating a beam which is coaxially aligned with the surgical laser beam. An aperture is place in the path of the beams to limit the quantity of light that can pass along the path. A steering mechanism is provided...http://www.google.com.tw/patents/US4881808?utm_source=gb-gplus-share專利 US4881808 - Imaging system for surgical lasers
