Two-dimensional angular optical scattering (TAOS) patterns of droplets composed of a mixture of H2O and D2O are detected in the mid infrared. First, a lens is used in the Abbé sine condition to collect a small solid angle of light, where the scattering pattern matches well numerical simulations based on Mie theory. Next, TAOS patterns from droplets spanning a large (≈2π sr) solid angle are captured simultaneously at two wavelengths. The effects of absorption are evident in the patterns and are discernible without the need for curve matching by Mie theory.
© 2004 Optical Society of America
(000.1570) General : Chemistry
(010.1100) Atmospheric and oceanic optics : Aerosol detection
(290.3030) Scattering : Index measurements
(290.4020) Scattering : Mie theory
(290.5850) Scattering : Scattering, particles
Kevin B. Aptowicz, Yong-Le Pan, Richard K. Chang, Ronald G. Pinnick, Steven C. Hill, Richard L. Tober, Anish Goyal, Thomas Jeys, and Burt V. Bronk, "Two-dimensional angular optical scattering patterns of microdroplets in the mid infrared with strong and weak absorption," Opt. Lett. 29, 1965-1967 (2004)