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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Schmidt corrector plate canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4637458 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Schmidt corrector plate Context triple: [Schmidt–Cassegrain telescope design, usesCorrectorType, Schmidt corrector plate]
-
A.
Schmidt telescope
A Schmidt telescope is a wide-field reflecting telescope design that uses a spherical primary mirror and a correcting lens to capture sharp images over a large area of the sky.
-
B.
Ritchey–Chrétien reflector
A Ritchey–Chrétien reflector is a specialized type of reflecting telescope that uses hyperbolic primary and secondary mirrors to produce a wide, coma-free field of view ideal for professional astronomical imaging.
-
C.
Barlow lenses
Barlow lenses are optical accessories used in telescopes to effectively increase focal length and magnification by diverging the light path before it reaches the eyepiece.
-
D.
Schmidt–Cassegrain telescope design
The Schmidt–Cassegrain telescope design is a compact catadioptric optical system that combines a spherical primary mirror with a Schmidt corrector plate to provide long focal lengths in a short, portable tube widely used in amateur and professional astronomy.
-
E.
Cassegrain focus
Cassegrain focus is a telescope optical configuration in which light is reflected by a secondary mirror back through a hole in the primary mirror to form a compact, accessible focal point behind the primary.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Schmidt corrector plate Target entity description: 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.
-
A.
Schmidt telescope
A Schmidt telescope is a wide-field reflecting telescope design that uses a spherical primary mirror and a correcting lens to capture sharp images over a large area of the sky.
-
B.
Ritchey–Chrétien reflector
A Ritchey–Chrétien reflector is a specialized type of reflecting telescope that uses hyperbolic primary and secondary mirrors to produce a wide, coma-free field of view ideal for professional astronomical imaging.
-
C.
Barlow lenses
Barlow lenses are optical accessories used in telescopes to effectively increase focal length and magnification by diverging the light path before it reaches the eyepiece.
-
D.
Schmidt–Cassegrain telescope design
The Schmidt–Cassegrain telescope design is a compact catadioptric optical system that combines a spherical primary mirror with a Schmidt corrector plate to provide long focal lengths in a short, portable tube widely used in amateur and professional astronomy.
-
E.
Cassegrain focus
Cassegrain focus is a telescope optical configuration in which light is reflected by a secondary mirror back through a hole in the primary mirror to form a compact, accessible focal point behind the primary.
- F. None of above. chosen
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 ⓘ |
| 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 ⓘ |
| 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
ⓘ
linked to:
Maksutov telescope
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 ⓘ Schmidt–Cassegrain telescope ⓘ
linked to:
Schmidt–Cassegrain telescope design
space surveillance telescopes ⓘ survey telescopes ⓘ |
| worksWith | spherical primary mirror ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Schmidt corrector plate Description of subject: 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.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.