26 July 1999 Fast 8- to 12-μm objectives utilizing multiple aspheric surfaces
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As the market for uncooled 8-12 micrometers thermal imaging cameras continues to expand and prices decrease the expense of the objective lens is increasingly becoming the major factor for total system cost. Limited mainly to expensive raw materials for lens element substrates and requiring costly optical polishing man-hours for manufacture, the lens costs have been difficult to reduce without sacrificing optical performance. A family of fast objective lenses has been designed for uncooled long wave IR cameras that utilize multiple diamond turned aspheric surfaces to reduce the size and number of lens elements. The cost of the objective is thereby reduced without giving up any of the necessary optical performance while at the same time gaining improvements in overall size and weight. A description is given of this family lenses and its inherent advantages. The effectiveness of this solution is demonstrated with several examples that have been manufactured and fielded.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David G. Latimer, David G. Latimer, Louis R. Fantozzi, Louis R. Fantozzi, } "Fast 8- to 12-μm objectives utilizing multiple aspheric surfaces", Proc. SPIE 3698, Infrared Technology and Applications XXV, (26 July 1999); doi: 10.1117/12.354492; https://doi.org/10.1117/12.354492


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