6 July 2006 Mounting of large lenses in infrared instruments
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Infrared instruments are generally operated at cryogenic temperature which causes a serious problem for the mounting of optical components. This is specially the case for complex dioptric systems where the optical quality is strongly dependant from the relative centering of the lenses. In the frame of the pre-design of the VLT high resolution and large field infrared imager (HAWK-I) a design using spring system has been intensively tested. The paper describes the test carried out in order to assess the thermal and mechanical behavior of the mount. A special technique has been used to accurately verify the conservation of the lens position from room temperature to cryogenic temperature.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jean Louis Lizon, Jean Louis Lizon, Gotthard Huster, Gotthard Huster, } "Mounting of large lenses in infrared instruments", Proc. SPIE 6273, Optomechanical Technologies for Astronomy, 62733M (6 July 2006); doi: 10.1117/12.670233; https://doi.org/10.1117/12.670233

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