 |
|
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
|
|
Fabry lens
A lens that forms an image of the telescope’s primary mirror onto the photocathode of a photomultiplier tube and, in this way, serves as a key element of photometer. A mask, placed in front of it, isolates the object whose light intensity is to be measured. The use of such a lens was first proposed by the French physicist Charles Fabry.
Related category
• OPTICS AND OPTICAL PHENOMENA
Also on this site:
Encyclopedia of Alternative Energy & Sustainable Living
Encyclopedia of History
Transport Concepts & Designs (partner site)