Abstract

In this paper, the results of the thermo-elastic analysis performed on the stereo channel of the imaging system Integrated Observatory System for the BepiColombo European Space Agency mission to Mercury are presented. The aim of the work is to determine the effects of ambient parameter variations on the equipment performance; the optical performance is changing during the mission lifetime primarily because of the optics misalignments and deformations induced by temperature variations. The camera optics and their mountings are modeled and processed by a thermo-mechanical finite element model (FEM) program, which reproduces the expected optics and structure thermo-elastic deformations in the instrument foreseen operative temperature range, i.e., between 20°C and 30°C. The FEM outputs are elaborated using a MATLAB optimization routine: an algorithm based on nonlinear least square data fitting is adopted to determine the surface equation (plane, spherical, nth polynomial) which best fits the deformed optical surfaces. The obtained surfaces are then directly imported into a ZEMAX code for sequential ray-tracing analysis. Variations of the optical spot diagrams, modulation transfer function curves, and ensquared energy are then computed. The overall analysis shows that the preferred solution for mounting the optical elements is adopting the kinematic constraints instead of using the classical glue solution.

© 2011 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Optical design of the single-detector planetary stereo camera for the BepiColombo European Space Agency mission to Mercury

Vania Da Deppo, Giampiero Naletto, Gabriele Cremonese, and Luciano Calamai
Appl. Opt. 49(15) 2910-2919 (2010)

Space-qualified laser system for the BepiColombo Laser Altimeter

Reinald Kallenbach, Eamonn Murphy, Bodo Gramkow, Markus Rech, Kai Weidlich, Thomas Leikert, Reiner Henkelmann, Boris Trefzger, Bodo Metz, Harald Michaelis, Kay Lingenauber, Simone DelTogno, Thomas Behnke, Nicolas Thomas, Daniele Piazza, and Karsten Seiferlin
Appl. Opt. 52(36) 8732-8746 (2013)

High accuracy alignment facility for the receiver and transmitter of the BepiColombo Laser Altimeter

Sumita Chakraborty, Michael Affolter, Kurt Gunderson, Jakob Neubert, Nicolas Thomas, Thomas Beck, Michael Gerber, Stefan Graf, Daniele Piazza, Antoine Pommerol, Guillaume Roethlisberger, and Karsten Seiferlin
Appl. Opt. 51(20) 4907-4915 (2012)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (17)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (2)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription