Schmidt corrector plate
E458952
A Schmidt corrector plate is a specially shaped aspheric lens used at the entrance of Schmidt-type telescopes to correct spherical aberration and produce a wide, well-corrected field of view.
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
aspheric lens
ⓘ
optical element ⓘ telescope corrector ⓘ |
| aberrationTypeAddressed |
field curvature (partially)
ⓘ
off-axis coma (partially) ⓘ on-axis spherical aberration ⓘ |
| alternativeTo | parabolic primary mirror for wide-field correction ⓘ |
| benefit |
allows use of simple spherical primary mirror
ⓘ
improves image quality over large angular field ⓘ |
| componentOf | catadioptric optical system ⓘ |
| correctsAberration | spherical aberration ⓘ |
| designedBy | Bernhard Schmidt NERFINISHED ⓘ |
| designYear | 1930 ⓘ |
| enables |
well-corrected field of view
ⓘ
wide field of view ⓘ |
| fieldOfUse |
astronomical optics
ⓘ
imaging systems design ⓘ optical engineering ⓘ |
| governingEquation | Schmidt corrector plate sag equation ⓘ |
| hasProperty |
axisymmetric surface profile
ⓘ
low chromatic aberration when used with spherical mirror ⓘ thin compared to aperture diameter ⓘ |
| locatedAt | aperture stop of Schmidt systems ⓘ |
| manufacturingMethod |
computer-controlled polishing
ⓘ
vacuum deformation and polishing ⓘ |
| material | optical glass ⓘ |
| namedAfter | Bernhard Schmidt NERFINISHED ⓘ |
| opticalFunction |
flattens focal plane over wide field
ⓘ
introduces controlled spherical aberration of opposite sign ⓘ reduces off-axis aberrations ⓘ |
| partOf | entrance window of closed-tube Schmidt systems ⓘ |
| position |
entrance pupil of a Schmidt system
ⓘ
front of the primary mirror in a Schmidt telescope ⓘ |
| relatedTo |
Maksutov corrector
NERFINISHED
ⓘ
aspheric corrector lens ⓘ |
| shape |
aspheric
ⓘ
thin lens-like plate ⓘ |
| surfaceType | non-spherical refracting surface ⓘ |
| usedFor |
astronomical imaging
ⓘ
astrophotography ⓘ comet and asteroid searches ⓘ wide-field sky surveys ⓘ |
| usedIn |
Schmidt camera
ⓘ
Schmidt telescope NERFINISHED ⓘ Schmidt–Cassegrain telescope NERFINISHED ⓘ space surveillance telescopes ⓘ survey telescopes ⓘ |
| worksWith | spherical primary mirror ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.