view article
Figure 3
For all points on the surface of the hyperbola or hyperboloid, the difference between the distances to the foci is 2a [equation (1)[link]]. The essential optical property of the hyperbola is that the tangent bisects the angle created by the lines to the foci.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 30| Part 3| May 2023| Pages 514-518
https://doi.org/10.1107/S1600577523001492
Follow J. Synchrotron Rad.
Sign up for e-alerts
E-alerts
Follow J. Synchrotron Rad. on Twitter
Twitter
Follow us on facebook
Facebook
Sign up for RSS feeds
RSS