| 摘要 |
PROBLEM TO BE SOLVED: To prevent an objective lens from being stolen or lost and to secure safety to harmful light by providing a cover so that it may surround the outer peripheries of the side surfaces of plural objective lenses mounted on a revolver. SOLUTION: A revolver main body 401 is provided with a revolver tray part 403 rotatably centering a shaft 404 on an inclined surface inclined at a specified angle. Then, the cover 13 is attached to a turning ring 405 arranged on the tray part 403. The cover 13 is formed as a cylinder to surround the outer peripheries of the side surfaces of all the objective lenses 6 mounted on the tray part 403, and its base end is fixed on the peripheral surface of the ring 405 by plural screws 14 and made rotatable centering the shaft 404 together with the tray part 403. By such constitution, the outer peripheries of the side surfaces of all the lenses 6 mounted on the tray part 403 in a screwing system are surrounded by the cylindrical cover 13 fixed on the revolver, so that the operator of the microscope is prevented from touching the objective lens 6 with his (her) hand.
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