1997
DOI: 10.1117/12.290145
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Final prototype design for the adaptive secondary mirror of the 6.5-m MMT

Abstract: The upgraded 6.5 mMMT in Arizona will use an adaptive secondary to optimize performance in the near infrared spectral region. The secondary mirror is a 2 mm thick, 640 mm diameter Zerodur shell suspended only by a flexible center hub. Three hundred voice coil actuators installed in an aluminum reference surface deform the shell according to commands from a wavefront sensor. Capacitor position sensors surrounding each actuator provide feedback in an inner servo loop, much faster than the exterior wavefront sens… Show more

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“…The design of the 60-actuator prototype has been discussed in detail in Bruns et al 7 Only a sununary of the important design features will be included here. Figure 2 shows a photograph of the 60-actuator adaptive secondary prototype mirror.…”
Section: -Actuator Adaptive Secondary Prototype Mechanical Designmentioning
confidence: 99%
“…The design of the 60-actuator prototype has been discussed in detail in Bruns et al 7 Only a sununary of the important design features will be included here. Figure 2 shows a photograph of the 60-actuator adaptive secondary prototype mirror.…”
Section: -Actuator Adaptive Secondary Prototype Mechanical Designmentioning
confidence: 99%