生物显微镜是生物教学实验中常用的一种精密光学仪器,由机械系统和光学系统两部分组成。机械系统包括:镜筒传动部分、物镜转动部分、载物台、压片夹和遮光器的转换部分、镜架和底座的转动部分等。 Biological microscope is a kind of precision optical instrument commonly used in biological teaching experiment, which is composed of mechanical system and optical system. The mechanical system includes a lens barrel driving part, a rotating part of the objective lens, a conversion part of the stage, the pressing clip and the shutter, a rotating part of the frame and the base, and the like.