Stereo microscope

摘要

A stereo microscope capable of not only adjusting the three dimensional effect of stereoscopic image but also focusing exactly even when the three dimensional effect of stereoscopic image is adjusted, is provided. A spacing distance of a pair of zoom unit can be adjusted so that a user can adjust three dimensional effect of image seen through an ocular lens according to personal tendency to improve convenience. Additionally, an object with a depth such as a hole can be exactly observed without interference of a boundary. Further, even though the three dimensional effect of an image is adjusted by adjusting the spacing distance of the pair of zoom units, the focus of optical system can be exactly adjusted.

主权项

1. A stereo microscope comprising:
a pair of zoom units disposed on a focusing lens, the pair of zoom units having a left zoom unit and a right zoom unit, the pair of zoom units configured such that a spacing distance between the left zoom unit and the right zoom unit are adjusted to adjust a three dimensional effect; a pair of first prisms disposed on the zoom units, the pair of first prisms having a left first prism and a right first prism, which are on the left zoom unit and the right zoom unit, respectively, configured such that the left first prism and the right first prism move in accordance with the left zoom unit and the right zoom unit, respectively; a pair of second prisms receiving a beam from the pair of first prisms to change a direction of the beam, the pair of second prisms having a left second prism corresponding to the left first prism and a right second prism corresponding to the right first prism; and a third prism receiving the beam from the pair of second prisms to change a direction of the beam, a spacing distance between the third prism and each of the pair of second primes being adjusted by compensating amount of changed beam path length between the pair of first prisms and the pair of second prisms when the each of the left first prism and the right first prism moves in accordance with the left zoom unit and the right zoom unit so as to maintain the beam path constantly.