Affiliation:
1. Ural Federal University named after the First President of Russia B. N. Yeltsin
Abstract
The problematic issues connected with the optical details deformations that arise during the temperature tests of cemented assemblies are considered. Climatic tests of optical devices after assembly result in a change of technical product characteristics. The research problem is to define how N and ∆N of surfaces of cemented optical assemblies are changing after the temperature testing. The research objects are plane convex lenses fabricated of LK7 (LZOS) glass brand and plane concave lenses - of TF7 (LZOS). Before cementing, the bounded surfaces cleaning by the hydromechanical method in the clean room has been purged. The temperature testing of samples is held at 22, 50 and 65 °C. The effect of temperature on a surface deformation of cemented optical assemblies is experimentally established. The comparison of effect of optical cements OK72FT5 and OK72FT15 on the optical surfaces deformation is carried out. In this paper we have compared the results of shape accuracy of the external surfaces of optical assemblies and the flat surfaces. Interferograms of lenses after heat treatment of optical assemblies are presented. It is determined that the cement polymerization temperature equals or higher than the test temperature.
Publisher
Trans Tech Publications, Ltd.
Subject
Condensed Matter Physics,General Materials Science,Atomic and Molecular Physics, and Optics
Reference27 articles.
1. M.A. Okatov, ed., Optical Technician's Handbook (Politekhnika, St. Petersburg, 2004).
2. W. Moreau, Semiconductor Lithography: Principles, Practices, and Materials (Springer, 1988).
3. V.E. Levinok and V.B. Martynova, Strain-free cementing of quartz to Invar, J. Opt. Technol. 62 (1995) 724-727.
4. V.V. Potelov, The possibility of increasing the strength of cemented optical assemblies when there is a large difference of the linear thermal-expansion coefficients, J. Opt. Technol. 76 (2009) 371-372.
5. D.Y. Kruchinin, O.B. Yakovlev and M.P. Andronov, Cementing optical items that have zero cleanliness classes of polished surfaces, J. Opt. Technol. 78 (2011) 279-280.