isoptic


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isoptic

[ī′säp·tik]
(mathematics)
The locus of the intersection of tangents to a given curve that meet at a specified constant angle.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
where [[OMEGA].sub.1] is the exterior of an isoptic [C.sub.[beta] + [gamma]] of an oval C.
Note that the equation of isoptic [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII.] given by the formula
Therefore we do not have to define isoptics of first and second kind, but we can consider isoptics of the pair [[GAMMA].sub.2] and [[GAMMA].sub.1].
It is easy to see that the mapping [F.sub.[beta], [gamma]] ([alpha], t) is a diffeomorphism, similarly as it was for isoptics F0,0 ([alpha], t).
The formula (5.1) can be found in [7] but in [1] authors used the isoptics to prove it.