| 摘要 |
1,071,776.. Surgical optical instruments. CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE. Dec. 3, 1963 [Dec. 4, 1962; Nov. 28, 1963], No. 47666/63. Heading A5R. [Also in Division G2] A contact endo scope comprises a transparent rod for both lighting and observation and the distal end face of the rod is convex while the proximal end face is either plane or convex, so that, during observation, the rod acts as a lens. In one form of the device a rod 9, of glass - or transparent synthetic resin; is convex at both its proximal 18 and distal 17 end faces and is surrounded by, but spaced from, a protective metal sheath 10 except for a short length 15 where its cylindrical surface is ribbed or striated. This latter formation assists the reception of light from all directions into the rod and this light is conducted by internal reflection to the distal end of the device to illuminate the surface being viewed. The convex surfaces 17, 18 cooperate to present a magnified image to an eye aligned with the axis of the rod. Other embodiments described include the addition of a further magnifying eyepiece, supplementary lighting means arranged around the eyepiece and the use of a totally reflecting prism to permit lateral viewing.
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