types and classification simple lenses |
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| navigate by keyword : arched biconcave biconvex blue bundled collecting concave contact convex crosssection curvature cutout diopters dioptrie dispersal eyeglasses focus glass glasses goggles lens light look meniscus optical optically optics optional physics plano planoconcave planoconvex plastic ray refraction refractive schematic sharpness specs spectacles spherical surface symmetrical symmetry transparent vault vitreous watch |
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| Lenses are classified by the curvature of the two optical surfaces - Converging lenses and Diverging lenses. |
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