30 September 2004 The design of a breadboard cryogenic optical delay line for DARWIN
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Abstract
TNO TPD, in cooperation with Micromega-Dynamics, SRON, Dutch Space and CSL, has designed a compact breadboard cryogenic delay line for use in future space interferometry missions. The work is performed under ESA contract in preparation for the DARWIN mission. The breadboard (BB) delay line is representative of a flight mechanism, with all materials and processes used being flight representative. The delay line has a single stage voice coil actuator for Optical Path Difference (OPD) control, driving a two-mirror cat's eye. Magnetic bearings provide frictionless and wear free operation with zero-hysteresis. Overall power consumption is below the ESA specification of 2.5 W. The power dissipated on the optical bench at 40 K is considerably less than the maximum allowable 25 mW. The design of the BB delay line has been completed. Verification testing, including functional testing at 40 K, is planned to start in the 4th quarter of 2004. The current design could also be adapted to the needs of the TPF-I mission.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Teun C. van den Dool, Teun C. van den Dool, Fred Kamphues, Fred Kamphues, B. Fouss, B. Fouss, K. Henrioulle, K. Henrioulle, P. P. Kooijman, P. P. Kooijman, Martijn Visser, Martijn Visser, G. Velsink, G. Velsink, K. Fleury, K. Fleury, } "The design of a breadboard cryogenic optical delay line for DARWIN", Proc. SPIE 5528, Space Systems Engineering and Optical Alignment Mechanisms, (30 September 2004); doi: 10.1117/12.549430; https://doi.org/10.1117/12.549430
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