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

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].
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 explore the caustic curve by using the evolute of the orthotomic, applying equation [16] and with the help of [Maple] in the following examples.
Figure 12 shows the caustic curve formed by light reflecting in a wedding ring.