White light from a lamp
The objective lens of a digital projector is illuminated with white light from a lamp. The interaction of light propagating through the lenses and separating into different colors is captured by a mobile-phone camera.
—Yareli Navarro-Martínez, Erika Nohemí Hernández-Escobar and Miguel Ángel Bello-Jiménez, Universidad Autónoma de San Luis Potosí, Mexico