Schmidt telescope
E375985
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Schmidt camera | 4 |
| Schmidt telescope canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T3631136 — 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 telescope Context triple: [Kepler space telescope, telescopeType, Schmidt telescope]
-
A.
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.
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B.
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.
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C.
Curtis Schmidt Telescope
The Curtis Schmidt Telescope is a wide-field Schmidt telescope known for its photographic sky surveys and operation at the Cerro Tololo Inter-American Observatory in Chile.
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D.
Maksutov–Cassegrain telescope design
The Maksutov–Cassegrain telescope design is a compact catadioptric optical system that uses a spherical primary mirror and a meniscus corrector lens to provide long focal lengths with well-corrected, high-contrast images in a relatively short tube.
-
E.
20 Meter Telescope
The 20 Meter Telescope is a mid-sized radio telescope at the Green Bank Observatory used for astronomical research and education in radio astronomy.
- 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 telescope Target entity description: 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.
-
A.
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.
-
B.
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.
-
C.
Curtis Schmidt Telescope
The Curtis Schmidt Telescope is a wide-field Schmidt telescope known for its photographic sky surveys and operation at the Cerro Tololo Inter-American Observatory in Chile.
-
D.
Maksutov–Cassegrain telescope design
The Maksutov–Cassegrain telescope design is a compact catadioptric optical system that uses a spherical primary mirror and a meniscus corrector lens to provide long focal lengths with well-corrected, high-contrast images in a relatively short tube.
-
E.
20 Meter Telescope
The 20 Meter Telescope is a mid-sized radio telescope at the Green Bank Observatory used for astronomical research and education in radio astronomy.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
telescope design
ⓘ
wide-field reflecting telescope ⓘ |
| correctorPlatePosition | at or near telescope aperture ⓘ |
| correctsAberration |
coma (partially)
ⓘ
spherical aberration ⓘ |
| designedTo | capture sharp images over a large area of the sky ⓘ |
| enables |
discovery of faint, extended astronomical objects
ⓘ
systematic photographic sky surveys ⓘ |
| fieldCorrectionMethod | aspheric corrector plate at entrance pupil ⓘ |
| firstBuiltAt | Hamburg Observatory ⓘ |
| hasAdvantage |
large corrected field
ⓘ
low optical distortion over wide field ⓘ |
| hasCorrectorLocation | center of curvature of primary mirror ⓘ |
| hasCorrectorType | aspheric lens ⓘ |
| hasDisadvantage |
corrector plate can be large and heavy for big apertures
ⓘ
curved focal surface complicates detector mounting ⓘ |
| hasFieldOfView | wide field of view ⓘ |
| hasFocalSurface | curved focal plane ⓘ |
| hasHistoricalImportance | revolutionized photographic sky surveys in 20th century ⓘ |
| hasOpticalConfiguration | prime-focus design ⓘ |
| hasPrimaryMirrorShape | spherical mirror ⓘ |
| hasVariant |
Baker–Nunn camera
ⓘ
Schmidt–Cassegrain telescope design ⓘ
surface form:
Schmidt–Cassegrain telescope
|
| influencedDesign |
Schmidt telescope
self-linksurface differs
ⓘ
surface form:
Schmidt camera
Schmidt–Cassegrain telescope design ⓘ
surface form:
Schmidt–Cassegrain telescope
|
| inventedBy | Bernhard Schmidt ⓘ |
| inventionYear | 1930 ⓘ |
| inventorNationality | Estonian-German ⓘ |
| isNamedAfter | Bernhard Schmidt ⓘ |
| isTypeOf | catadioptric telescope ⓘ |
| lightPath | single reflection from primary mirror to focal surface ⓘ |
| mountingType | various telescope mounts ⓘ |
| notableExample |
ESO Schmidt Telescope at La Silla Observatory
ⓘ
Palomar 48-inch Schmidt Telescope ⓘ
surface form:
Palomar Observatory Oschin Schmidt Telescope
UK Schmidt Telescope ⓘ
surface form:
UK Schmidt Telescope at Siding Spring Observatory
|
| optimizedFor | wide-field imaging ⓘ |
| primaryMirrorType | fixed spherical mirror ⓘ |
| typicallyUsesDetector |
CCD detector (modern)
ⓘ
photographic plate (historically) ⓘ |
| typicalUse |
astronomical sky surveys
ⓘ
comet and asteroid searches ⓘ mapping Milky Way structure ⓘ wide-field astrophotography ⓘ |
| usedBy |
amateur astronomers (smaller versions)
ⓘ
professional observatories ⓘ |
| usesOpticalElement | Schmidt corrector plate ⓘ |
| usesOpticalSystem | combination of mirror and lens ⓘ |
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 telescope Description of subject: 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.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Schmidt camera
this entity surface form:
Schmidt camera
this entity surface form:
Schmidt camera
this entity surface form:
Schmidt camera