Secondary axis definitions

secondary axis

Any ray passing through the optical centre of a lens. ... (05 Mar 2000) ...
Found on http://www.encyclo.co.uk/local/20973

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secondary axis

Type: Term Definitions: 1. any ray passing through the optic center of a lens.
Found on http://www.medilexicon.com/medicaldictionary.php?t=8978

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