Spectrogonio Radiometer for the Study of the Bidirectional Reflectance and Polarization Functions of Planetary Surfaces. 1. Design and Tests

Details Spectrogonio Radiometer for the Study of the Bidirectional Reflectance and Polarization Functions of Planetary Surfaces. 1. Design and Tests Spectrogonio Radiometer for the Study of the Bidirectional Reflectance and Polarization Functions of Planetary Surfaces. 1. Design and Tests

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apopt..43.1926b&link_type=abstract

Applied Optics, Volume 43, Issue 9, pp. 1926-1937 (2004).

Physics

Optics

17

Optical Design Techniques, Optical Instruments, Light Scattering, Rough Surfaces, Radiometers, Reflection, Polarisation, Infrared Spectroscopy, Visible Spectroscopy

Scientific paper

We have developed a spectrogonio radiometer to measure in the laboratory (-35 °C to +30 °C) the bidirectional reflectance and polarization distribution functions of various types of planetary material from the UV to the near-IR (310-4800 nm). The major, to our knowledge, novel feature of this instrument is that it is capable of measuring dark to translucent materials with a high degree of radiometric accuracy under most viewing geometries. The sample surface is illuminated with a large monochromatic and polarized parallel beam (incidence: 0°-90°), and the total intensity and the two polarized components of the reflected light are measured (observation, 0°-80° azimuth, 0°-180°). The scientific and technical constraints, the design, and the performances and limitations of the system are presented in this first paper.

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