GRADIENT OPTICAL SYSTEM OF ULTRAFINE ENDOSCOPE WITH DIRECTION OF OBSERVATION DIFFERENT FROM STRAIGHT ONE Russian patent published in 1998 - IPC

FIELD: medical engineering. SUBSTANCE: system has device 1 for changing the direction of optical axis, gradational objective 2, gradational translator 3, and eyepiece 4. Device 1 is made in the form of two optical wedges 5 and 6 outer surfaces 7 and 8 of which are positioned at right angles with endoscope axis and inner surfaces 9 and 10 are inclined to opposite sides from the same axis. Device 1 may also be manufactured as single wedge 11, input surface 12 of which is positioned perpendicularly to endoscope axis. Thin protective plane-parallel plate 13 glued to input face of gradational objective 2 is mounted behind bending wedge 11. EFFECT: enhanced control and observation. 3 cl, 3 dwg