= Gérard Lemaitre
{c}
An astronomical-optics researcher whose <active optics> methods use controlled <elastic deformation> to produce accurate optical surfaces. A mirror can be polished while stressed and then released into a desired aspheric shape; related methods change curvature during use. His work connects elasticity calculations with telescope and spectrograph construction, reducing fabrication errors while keeping optical designs relatively simple.<Active Optics Methods by Gérard Lemaitre>[Research section: stress figuring, in-situ surface changes and variable-curvature mirrors]{ref}
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