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22 September 1983 The Identification Of Common Production Errors In Thermal Imaging Lenses
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The failure of IR systems to attain their design performance is usually attributed to four basic errors, namely decentration or tilt, form error, materials defects and transmission or coating defects. Until fairly recently it was difficult to determine what error or combination of errors was contributing to an unacceptable drop in performance of a system. The introduction of a semi-automatic high precision scanning far infrared interferometer has allowed the complete diagnosis of system defects, along with an accurate measure of any error and its effect on system performance in terms of wavefront error, MTF, etc. Results on a variety of systems which exhibit the above errors will be presented and their root cause and subsequent cure will be discussed. The value of such an instrument for both prototype building and production runs will be described.
© (1983) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. R. J. Campbell "The Identification Of Common Production Errors In Thermal Imaging Lenses", Proc. SPIE 0416, Applications of Optical Metrology: Techniques and Measurements II, (22 September 1983);

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