Eyepiece for microscope, has diopter adjustment ring adjusting diopter rate, and eye cup adjusted relative to adjustment ring, and valve controlling air pressure at eyepiece housing for different relative adjustability of cup

摘要

The eyepiece (70) has a diopter adjustment ring (10) adjusting a diopter rate, and an eye cup (50) adjusted relative to the diopter adjustment ring. Limiting contact surfaces between the eye cup and the adjustment ring and between the adjustment ring and an eyepiece housing (30) comprise a same lubricant. A valve (32) controls air pressure at the eyepiece housing for different relative adjustability of the eye cup, and produces high pressure or low pressure in a part (20) of the housing based on the adjustment of the ring.