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Schmidt corrector plate

JHOLLAND1

Titanium
Joined
Oct 8, 2005
Location
western washington state
Schmidt corrector plate application is correction of spherical aberration
in mirrors found in reflector telescopes

precision grinding allows fractional wavelength optical restoration

Yamaguchi-san designs and manufactures grinding machines with resolution
required for large format celestial telescope Schmidt correctors--and provides interesting commentary

Ultra-high Precision Grinder - YouTube
 

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IIRC, at least one of the "classical" reflector telescopes (not Palomar but one of the others) erected in the US was found deficient somehow, either due to defect in manufacture, or even by the unanticipated static weight of the mirror. A correction plate was made and set all to right.

Joe in NH
 








 
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