Difference between revisions of "Belt (of a fixed lens)"

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The optically central portion of a fixed lens, consisting of a refracting element of annular shape and lenticular cross-section.
The optically central portion of a fixed lens, consisting of a refracting element of annular shape and lenticular cross-section.


[[Image:Ch2_Fig16a.jpg|400px]]
[[Image:Ch2_Fig16a.jpg|400px|border]]


[[Image:Ch2_Fig16b.jpg|400px]]
[[Image:Ch2_Fig16b.jpg|400px|border]]


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Revision as of 09:54, 1 March 2009

2-2-095

The optically central portion of a fixed lens, consisting of a refracting element of annular shape and lenticular cross-section.

Ch2 Fig16a.jpg

Ch2 Fig16b.jpg




Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)