A general expression has been derived for the dichromatic speckle cross spectrum (DCS), using as a unique assumption Korff’s log-normal model for the complex wave amplitude at the telescope pupil. For a given spectral bandwidth, it is shown that the attenuation of the DCS with respect to the monochromatic spectrum is strongly seeing dependent. A high-frequency asymptotic form is derived for the rapid numerical computation of the DCS, thus making it possible to estimate with ease the allowable spectral bandwidth for any given speckle experiment. The performance of the instrumental achromatization technique is analyzed and shown to be useful only with good seeing and narrow bandwidths.

© 1989 Optical Society of America

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription