| 摘要 |
<p>Optical system related to optical and rigid endoscopes (8) and allowing during the same endoscopic examination to switch from a low power magnification to a high power magnification observation by contact of this surface and vice versa. This optical system is comprised of a lens or a system of lenses to be placed before the existing endoscope objective and is further comprised of a lens or a system of lenses to be placed between the ocular of this endoscope and the eye. This invention may be used in medical or industrial endoscopy. </p> |
