The point spread function (PSF) characteristics of wavelengths for a wavefront coding imaging system are investigated. Although the phase delayed by the mask changes with wavelength, the shape of the PSF is nearly invariant with respect to wavelength. However, the position of the PSF shifts with axial chromatic aberration. If the wideband light is separated into several channels and separated channel images are restored using the same filter, then color traces may be observed in the recombined color images.
© 2011 Optical Society of America
Original Manuscript: September 9, 2011
Revised Manuscript: October 26, 2011
Manuscript Accepted: October 27, 2011
Published: November 28, 2011
Rongfu Zhang and Kang Lu, "Variations in the point spread function characteristics of wavelengths for a wavefront coding imaging system," Opt. Lett. 36, 4647-4649 (2011)