Patent ID: 6765707
Filing Date: 2004-07-20
Classification: G01J

Abstract:
A variable slit width device for a spectroscope comprising a fixed part fixed to an optical device, a pair of slit holders fixed to the fixed part, guide parts provided on adjacent surfaces of the pair of slit holders and inclined by a given angle, slit defining members attached to side surfaces of the pair of slit holders, first linear guides having guide elements provided at lower surfaces thereof and extending vertically, the slit holders being fixed to the first linear guides and first guide rails being fitted to the guide elements of the first linear guides, attachment plates for fixing the first guide rails, springs for urging the pair of slit holders in a direction toward one another, and exclusive electrodes attached to the respective slit defining members for detecting a zero point of an interval between the slit defining members, said variable slit width device further comprising:a pair of freely rotatable rotary parts for pressing the inclined guide parts of the pair of slit holders; pressing parts for supporting the pair of rotary parts; second linear guides having guide elements formed at lower surfaces thereof and extending horizontally in a direction crossing with the first guide rails at right angles, the pressing parts being fixed to the second linear guides; second guide rails fitted to the guide elements of the second linear guides; feed nuts fixed to the pressing parts; feed screws screwed with the feed nuts; bearings for rotatably supporting the feed screws; preload springs for preloading the feed nuts and the feed screws; a driving device for rotatably driving the feed screws; and a housing part for fixing thereto the second guide rails, the bearings and the driving device.