Seidel aberrations
E879170
Seidel aberrations are the primary third-order optical aberrations that describe how lens imperfections cause image defects such as blurring, distortion, and coma in optical systems.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Seidel aberrations canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T10688490 — 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: Seidel aberrations Context triple: [Philipp Ludwig von Seidel, knownFor, Seidel aberrations]
-
A.
Airy disk
An Airy disk is the central bright spot in the diffraction pattern formed when light passes through a circular aperture, fundamentally limiting the resolving power of optical systems.
-
B.
Schmidt corrector plate
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.
-
C.
Foucault knife-edge test
The Foucault knife-edge test is an optical testing method used to evaluate the shape and quality of telescope mirrors by analyzing how light is blocked by a moving knife edge at the mirror’s focus.
-
D.
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.
-
E.
Dioptrique
Dioptrique is a scientific treatise by René Descartes that lays out his pioneering theories on light and optics, including the law of refraction.
- 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: Seidel aberrations Target entity description: Seidel aberrations are the primary third-order optical aberrations that describe how lens imperfections cause image defects such as blurring, distortion, and coma in optical systems.
-
A.
Airy disk
An Airy disk is the central bright spot in the diffraction pattern formed when light passes through a circular aperture, fundamentally limiting the resolving power of optical systems.
-
B.
Schmidt corrector plate
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.
-
C.
Foucault knife-edge test
The Foucault knife-edge test is an optical testing method used to evaluate the shape and quality of telescope mirrors by analyzing how light is blocked by a moving knife edge at the mirror’s focus.
-
D.
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.
-
E.
Dioptrique
Dioptrique is a scientific treatise by René Descartes that lays out his pioneering theories on light and optics, including the law of refraction.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
optical aberration classification
ⓘ
third-order aberration ⓘ |
| alsoKnownAs |
primary aberrations
ⓘ
third-order Seidel aberrations ⓘ |
| appliesTo |
compound optical systems
ⓘ
lenses ⓘ mirrors ⓘ |
| assumes |
paraxial approximation
ⓘ
small aberrations ⓘ |
| cause |
astigmatism in images
ⓘ
blurring of images ⓘ coma in images ⓘ distortion of images ⓘ field curvature ⓘ image defects in optical systems ⓘ spherical aberration ⓘ |
| classificationCriterion | third-order terms in ray coordinates ⓘ |
| component |
astigmatism
ⓘ
coma ⓘ distortion ⓘ field curvature ⓘ spherical aberration ⓘ |
| dependsOn |
aperture stop position
ⓘ
field height ⓘ refractive indices of materials ⓘ surface curvatures of optical elements ⓘ |
| describedIn | third-order aberration theory ⓘ |
| field |
geometrical optics
ⓘ
optics ⓘ |
| goalOfCorrection |
improve image quality
ⓘ
increase resolution ⓘ reduce image blur ⓘ |
| historicalPeriod | 19th century ⓘ |
| mathematicalFormulation |
Seidel sums
NERFINISHED
ⓘ
third-order expansion of wavefront error ⓘ |
| namedAfter | Ludwig von Seidel NERFINISHED ⓘ |
| order | third order ⓘ |
| relatedTo |
Gaussian optics
NERFINISHED
ⓘ
Zernike polynomials NERFINISHED ⓘ wavefront aberration ⓘ |
| usedFor |
aberration balancing
ⓘ
lens design ⓘ optical system optimization ⓘ |
| usedIn |
camera lens design
ⓘ
microscope objective design ⓘ telescope design ⓘ |
| validityRange |
low numerical aperture
ⓘ
small field angles ⓘ |
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: Seidel aberrations Description of subject: Seidel aberrations are the primary third-order optical aberrations that describe how lens imperfections cause image defects such as blurring, distortion, and coma in optical systems.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.