Search
Menu
PFG Precision Optics - Precision Optics 12/24 LB
Photonics Dictionary

ghost

1. A faint second image caused by reflection that is sometimes seen when observing through an optical instrument. 2. With respect to spectroscopy, a false image of a spectral line formed by irregularities in the ruling of diffraction gratings. Rowland ghosts are clustered symmetrically on both sides of the true line, and Lyman ghosts are false orders of the spectra for which the order is not an integer.
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.