Microscope with auto focus and light adjusting means
US4725720A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1986 |
| Grant date | Feb 16, 1988 |
| Priority date | — |
| Expiry date | May 27, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A microscope comprises: PA1 a mount for mounting an object, a light source for illuminating the object, an enlarging optical system including a plurality of objectives provided on a revolver, and means for receiving light from the object to enlargingly form an image of the object. An observing optical system includes an ocular lens for observing said image. The microscope further comprises a magnification selecting unit including a driving mechanism for rotating the revolver, and a magnification selection control circuit for automatically positioning said selected objective to the optical axis of the enlarging optical system. An automatic focus adjusting unit includes a focus detector opposed to the observing optical system for discriminating the enlargedly formed image, and a mount moving device for driving the mount to the position of focus in response to an output signal from the focus detector. A light quantity adjusting unit adjusts the quantity of emitted light from the light source on the basis of a preset light quantity value. A control table automatically actuates the magnification selecting unit, the automatic focus adjusting unit and the light quantity adjusting unit in …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.