equiconcave

comparative more equiconcave · superlative most equiconcave

1. engineeringHaving surfaces with the same concave radius of curvature.

   In an equiconcave lens, the back surface would have a positive radius of curvature.

   2022 October 4, Samantha Strong, Introduction to Visual Optics, Elsevier Health Sciences, →ISBN, page 202

   2 more examples

   In an equiconcave lens the foci are virtual and are crossed over; thus, the lens in fig. 25A is equiconcave, the focus F, instead of being measured from A to the right hand, must be measured to the left hand; consequently, § of the thickness must be subtracted from the focal length in order to determine the distance of F from the surface of the lens.

   1901, William Benjamin Carpenter, William Henry Dallinger, The Microscope and Its Revelations, page 22

   A thin equiconvex lens of radius of curvature R made of material of refractive index μ₁ is kept coaxially, in contact with an equiconcave lens of the same radius of curvature and refractive index μ₂ (> μ₁).

   2024, YCT Expert Team, Physics Unsolved Papers, Youth Competition Times, page 215