title: Multiply diffracted light in the Czerny-Turner spectrometer.
abstract: At certain small angles of the grating, any in-plane spectrometer will pass stray light that has been returned by the reflecting optics for a second diffraction. Paths of this source of stray light and its strueture have been calculated and confirmed experimentally.
authors.affiliation: Harvard College, Cambridge Massachusetts 02138, USA.
authors.forename: J J
authors.initials: JJ
authors.lastname: Mitteldorf
authors.forename: D O
authors.initials: DO
authors.lastname: Landon