Compensation for Chromatic Aberrations in Acousto-Optic Systems Used in Spectral Analysis of Images

摘要

This paper considers novel optical schemes that are related to acousto-optic systems for the spec- tral analysis of images. The systems are characterized by a low level of transverse and longitudinal chromatic aberrations. Mathematical expressions that describe the magnitudes of the transverse aberration in various configurations of acousto-optic filters are derived. A decrease in longitudinal chromatic aberrations is exam- ined in an optical scheme that is based on a single objective lens and an additional negative lens. A similar analysis is carried out for a confocal system that is formed of two objective lenses. The experimental investi- gations carried out in the visible range of the spectrum demonstrated a decrease in the longitudinal shifts of images by a factor of 2.5 and by as much as two orders of magnitude or more in the transverse image shifts.