Cable-Related Terms/Optical Connector Terms/Terms Related to Optical Termination / Junction Box and Closure|FTTx Solutions FIBER OPTICS PRODUCTS|Sumitomo Electric
A useful list with explanations of commonly used optical terms (pdf)
Some Associated Terms of Lens Physics, knowledgeuniverseonline.com
astronomical optics, part 1: basic optics
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Define the following terms in connection with spherical lenses:(i) Centre of curvature (ii) Radius of curvature (iii) Principal axis (iv) Principal focus (v) Optical centre (vi) Focal length (vii) Aperture. - Zigya
Common Eye Terms - Optometrist Brian Van Dusen, OD in Banning, California