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Proceedings Paper

Arsenic sulphide athermal singlets for 3- to 5-μm imaging
Author(s): Patrick B. Conway; Douglas A. Payne; Christopher W. Slinger; Philip J. Rogers; Abdelkarim Zekak; Peter J.S. Ewen
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Paper Abstract

An arsenic trisulphide refractive plus diffractive hybrid element is both achromatic and athermal across the 3 - 5 micrometer waveband when set in an aluminum mount. We present two possible ways of manufacturing this element: using a photodarkening process to realize the diffractive structures, and by diamond turning, initially not thought to be viable. We demonstrate that the required depths in the diffractive surface are obtainable by both methods, and consider the advantages of each. Above all, however this lens is fabricated it offers, a very low cost, light weight solution to athermal singlet imaging in the 3 - 5 micrometer waveband.

Paper Details

Date Published: 13 August 1997
PDF: 10 pages
Proc. SPIE 3061, Infrared Technology and Applications XXIII, (13 August 1997); doi: 10.1117/12.280360
Show Author Affiliations
Patrick B. Conway, Defence Research Agency Malvern (United Kingdom)
Douglas A. Payne, Defence Research Agency Malvern (United Kingdom)
Christopher W. Slinger, Defence Research Agency Malvern (United Kingdom)
Philip J. Rogers, Pilkington Optronics Ltd. (United Kingdom)
Abdelkarim Zekak, Univ. of Edinburgh (United Kingdom)
Peter J.S. Ewen, Univ. of Edinburgh (United Kingdom)


Published in SPIE Proceedings Vol. 3061:
Infrared Technology and Applications XXIII
Bjorn F. Andresen; Marija Strojnik, Editor(s)

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