Optical system for microscopes
USRE36299E · kind E · reissue
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1997 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Feb 28, 2017 |
Classification
- Technology area (CPC —)General
Abstract
An optical system for microscopes includes an objective lens for collimating beams of light emanating from an object and an imaging lens for forming parallel beams emerging from the objective lens into an image of the object at a predetermined position, and satisfies the equation: EQU 0.5 f<W<1.1 f where W is the variable amount of spacing from the contact surface of the objective lens to the surface of incidence of the imaging lens and f is the focal length of the imaging lens. Thus, the optical system for microscopes allows a large variable amount to be secured while holding a good imaging condition and is unsurpassed in extensity of the system to be able to accommodate various modes of observation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.