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lens is equiconvex. A lens with two concave surfaces is biconcave (or just concave). If one of the surfaces is flat, the lens is plano-convex or plano-concave...

with lens designs in other sections, for example the Wollaston landscape lens is a single element and also a camera lens design. Basic types Biconcave lens...

{\displaystyle \phi ={(n_{2}-1) \over R}.} A biconcave lens made of flint glass with an index of 1.7 is measured with a lens clock calibrated for crown glass with...

central stop, or four air spaced lens elements in total: the outer pair is biconvex and the inner pair is biconcave; one example is the Celor. The Swiss...

system is useful in automotive radar applications. By using NIMs as a biconcave lens to focus microwaves, the antenna's sidelobes are reduced in size. This...

groups of three lenses each. The innermost element in each group is a positive meniscus, the outermost is biconvex, and there is a biconcave element between...

compound lens design consists of three air-spaced simple lens elements: two biconvex (positive) lenses surrounding a biconcave (negative) lens in the middle...

material.” Ground and Polished Plano-Plano Preform “As a lens changes to negative in power biconcave, plano-concave, and meniscus where the concave side is...

irrecusable, recusal, recusancy, recusant, recuse, ruse, rush cavus cav- hollow biconcave, biconcavity, cage, cajole, cajolement, caval, cavate, cavatina, cave...

curvature, the lens is equiconvex. A lens with two concave surfaces is biconcave (or just concave). If one of the surfaces is flat, the lens is plano-convex...

Mathew J (2017). "A unique Morrison-Formation sauropod specimen with biconcave dorsal vertebrae". PeerJ Preprints. doi:10.7287/peerj.preprints.3144v1...