Transient thermal design for athermal bond-line estimates

Daniel P. Gillund; Keith J. Kasunic

doi:10.1117/12.2594054

11 August 2021 Transient thermal design for athermal bond-line estimates

Daniel P. Gillund, Keith J. Kasunic

Proceedings Volume 11816, Optomechanics and Optical Alignment; 118160M (2021) https://doi.org/10.1117/12.2594054
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

Transient operating temperatures often allow a lens cell to expand before the lens itself, potentially leading to stresses well in excess of the lens tensile strength. The transients thus affect the calculation of the athermal bond-line thickness, estimates of which have historically been based on thermal equilibrium conditions. In this paper, we present both analytical expressions and finite-element modeling results for thermal-transient bond-line design. Our results show that a cell with a large CTE and a bond thickness based on thermal transients is the best strategy for reducing the tensile stress on the bonded lens over a range of operating temperatures.

Conference Presentation

Citation Download Citation

Daniel P. Gillund and Keith J. Kasunic "Transient thermal design for athermal bond-line estimates", Proc. SPIE 11816, Optomechanics and Optical Alignment, 118160M (11 August 2021); https://doi.org/10.1117/12.2594054

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