Lenses with small apertures and where the two centres of curvature are equidistant from the optical centre are referred to as thin lenses. The discussion in this chapter is specifically limited to the behavior of such thin lenses.
What term is used to describe lenses with small apertures and equidistant centres of curvature from the optical centre?
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Lenses with small apertures and equidistant centers of curvature from the optical center are typically referred to as “thin lenses.” Thin lenses are a simplification used in optics when the thickness of the lens is much smaller than the radii of curvature. This allows for convenient application of the lens maker’s formula and the lens formula, making calculations and analyses more straightforward.