Difference between revisions of "Ring"
Jump to navigation
Jump to search
m (1 revision) |
m (1 revision) |
||
| Line 14: | Line 14: | ||
{{languages|Ring}} | {{languages|Ring}} | ||
[[Category:2.2 Optical Apparatus] | [[Category:2.2 Optical Apparatus]] | ||
[[Category:Alphabetical Index]] | [[Category:Alphabetical Index]] | ||
[[Category:IALA Dictionary 1970-89 Edition]] | [[Category:IALA Dictionary 1970-89 Edition]] | ||
Revision as of 00:05, 25 February 2009
2-2-025
A transparent optical element, usually of glass or plastic, in the form of an annulus or annular segment, having a prismatic section in sense 2 of 2-2-020. There are both dioptric (2-2-060) and catadioptric (2-2-070) rings, usually forming part of an optical panel or a drum lens.
(Figs. 10 and 16)
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
