Stellar specklegrams at different wavelengths are examined. The position of the brightest speckle at one wavelength is shown to coincide nearly with that at a widely separated wavelength. The shift-and-add operation for specklegrams at one wavelength produces a high-resolution stellar image at the other wavelength. We show that the shift-and-add operation at 450 nm results in a high-resolution image at 800 nm by use of observational speckle data from which specklegrams at these wavelengths are taken simultaneously.
© 1995 Optical Society of America
Original Manuscript: November 22, 1994
Published: May 15, 1995
Naoshi Baba, Yuji Norimoto, Susumu Kuwamura, and Noriaki Miura, "Stellar speckle imaging by reference to different-colored specklegrams," Opt. Lett. 20, 1175-1177 (1995)