What question did this study set out to answer?

To develop and evaluate economical, short-wavelength cutoff transmission filters operating across the far-infrared spectral region.

January 1, 1962Journal of the Optical Society of America

Transmission Filters in the Far-Infrared Region

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Authors

YYYahiko YamadaTokyo Institute of Technology AMAkiyoshi MitsuishiThe University of Osaka HYHiroshi YoshinagaMinistry of Land, Infrastructure, Transport and Tourism

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Overview

Experimental evaluation demonstrates tunable short-wavelength cutoff filters using reststrahlen powders in polyethylene sheets, suggesting low-cost utility for far-infrared spectrometers.

Key Points

To develop and evaluate economical, short-wavelength cutoff transmission filters operating across the far-infrared spectral region.
Fabricated far-infrared optical filters by dispersing powders of reststrahlen crystals into polyethylene sheets.
Evaluated the effect of crystal species, powder grain size, and sheet thickness on spectral transmission across 25 to 300 μm.
Produced transmission filters spanning 25 to 300 μm that effectively block short-wavelength radiation, with cutoff wavelengths customizable by selecting different reststrahlen crystals.
Increased the steepness of the transmittance curve by decreasing powder particle size, reducing polyethylene sheet thickness, or combining both approaches.

Cite This Study

Yamada et al. (1962) studied this question.

synapsesocial.com/papers/6a83d2da8df3fed3c85bd7d7 https://doi.org/10.1364/josa.52.000017

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January 1, 1962Journal of the Optical Society of America

Transmission Filters in the Far-Infrared Region

View Full Paper

Ask AI

Bookmark

Authors

YYYahiko YamadaTokyo Institute of Technology AMAkiyoshi MitsuishiThe University of Osaka HYHiroshi YoshinagaMinistry of Land, Infrastructure, Transport and Tourism

Discussion

Member takes

Overview

Experimental evaluation demonstrates tunable short-wavelength cutoff filters using reststrahlen powders in polyethylene sheets, suggesting low-cost utility for far-infrared spectrometers.

Key Points

To develop and evaluate economical, short-wavelength cutoff transmission filters operating across the far-infrared spectral region.
Fabricated far-infrared optical filters by dispersing powders of reststrahlen crystals into polyethylene sheets.
Evaluated the effect of crystal species, powder grain size, and sheet thickness on spectral transmission across 25 to 300 μm.
Produced transmission filters spanning 25 to 300 μm that effectively block short-wavelength radiation, with cutoff wavelengths customizable by selecting different reststrahlen crystals.
Increased the steepness of the transmittance curve by decreasing powder particle size, reducing polyethylene sheet thickness, or combining both approaches.

Cite This Study

Yamada et al. (1962) studied this question.

synapsesocial.com/papers/6a83d2da8df3fed3c85bd7d7 https://doi.org/10.1364/josa.52.000017

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