Caustic curve

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(Optics) a curve to which the ray of light, reflected or refracted by another curve, are tangents, the reflecting or refracting curve and the luminous point being in one plane.

See also: Caustic

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The locus of the point B' is called the orthotomic curve and it is linked to the concept of a caustic curve [link to a video clip].
If a virtual screen is placed at a distance [z.sub.0] from the specimen front surface, a dark region called the shadow-spot, surrounded by a bright curve called the caustic curve is observed.
We show the orthotomic curve and its corresponding caustic curve in Figure 8.