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Infrared diffuser for application in transmission and reflection at 10.6 microm.
M Bjuggren1, L Krummenacher, L Mattsson
1Surface Evaluation Laboratory, Institute of Optical Research, S-100 44 Stockholm, Sweden.
Applied Optics
|February 1, 1997
Summary
A novel near-Lambertian diffuser for 10.6 micrometer infrared light was developed. This sodium chloride diffuser works in transmission and reflection, offering a flat scattering function and depolarization capabilities.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Developing efficient diffusers for infrared wavelengths is crucial for various optical applications.
- Existing diffusers may have limitations in performance across different modes or scattering angles.
Purpose of the Study:
- To create a near-Lambertian diffuser operating at 10.6 micrometers.
- To evaluate its performance in both transmission and reflection modes.
Main Methods:
- Fabrication of a porous sodium chloride (NaCl) window.
- Characterization of the diffuser's optical properties, including its bidirectional scattering distribution function (BSDF).
Main Results:
- The manufactured diffuser exhibits near-Lambertian scattering characteristics at 10.6 micrometers.
- The bidirectional scattering distribution function (BSDF) is nearly flat across various scattering and incidence angles.
- The diffuser effectively depolarizes scattered infrared radiation.
Conclusions:
- Porous sodium chloride is a viable material for creating effective infrared diffusers.
- The developed diffuser offers advantages in terms of manufacturing simplicity and performance, including depolarization.
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