Telecentric illumination system
US4526443A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 1982 |
| Grant date | Jul 2, 1985 |
| Priority date | — |
| Expiry date | Sep 14, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/145127
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A telecentric illumination system for telecentrically illuminating an object includes a light source, optical means for telecentrically supplying a light beam from the light source to the object, and an auxiliary condenser removably disposed between the optical means and the object to be illuminated. The auxiliary condenser has a first and a second lens group disposed with a spacing therebetween corresponding to the sum of the focal lengths thereof. Thus, when the auxiliary condenser is inserted between the optical means and the object to be illuminated, there is achieved a telecentric illumination of higher magnification than the illuminated condition by the optical means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.