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]] | ||
{{IALAFooter}} | {{IALAFooter}} | ||
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.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
