Fizeau interferometer
E773724
The Fizeau interferometer is an optical instrument that uses the interference of light reflected between closely spaced surfaces to make highly precise measurements of distances, surface flatness, and refractive index.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Fizeau interferometer canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9035424 — 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: Fizeau interferometer Context triple: [Armand Hippolyte Louis Fizeau, knownFor, Fizeau interferometer]
-
A.
Michelson interferometer
The Michelson interferometer is a precision optical instrument that splits and recombines light beams to measure extremely small differences in path length, widely used in fundamental physics experiments and metrology.
-
B.
Mach–Zehnder interferometer
The Mach–Zehnder interferometer is an optical device that splits and recombines light beams to produce interference patterns, widely used to demonstrate and study fundamental principles of quantum mechanics and wave interference.
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C.
Sagnac interferometer
A Sagnac interferometer is an optical device that splits and recombines light traveling in opposite directions around a closed loop to measure rotation or phase shifts with high precision.
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D.
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.
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E.
Fizeau experiment
The Fizeau experiment was a pioneering 19th-century physics experiment that measured the speed of light using a rotating toothed wheel and helped establish light’s finite velocity.
- 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: Fizeau interferometer Target entity description: The Fizeau interferometer is an optical instrument that uses the interference of light reflected between closely spaced surfaces to make highly precise measurements of distances, surface flatness, and refractive index.
-
A.
Michelson interferometer
The Michelson interferometer is a precision optical instrument that splits and recombines light beams to measure extremely small differences in path length, widely used in fundamental physics experiments and metrology.
-
B.
Mach–Zehnder interferometer
The Mach–Zehnder interferometer is an optical device that splits and recombines light beams to produce interference patterns, widely used to demonstrate and study fundamental principles of quantum mechanics and wave interference.
-
C.
Sagnac interferometer
A Sagnac interferometer is an optical device that splits and recombines light traveling in opposite directions around a closed loop to measure rotation or phase shifts with high precision.
-
D.
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.
-
E.
Fizeau experiment
The Fizeau experiment was a pioneering 19th-century physics experiment that measured the speed of light using a rotating toothed wheel and helped establish light’s finite velocity.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
interferometer
ⓘ
optical instrument ⓘ |
| achieves |
high measurement accuracy
ⓘ
sub-wavelength resolution ⓘ |
| canBe |
multi-wavelength
ⓘ
single-wavelength ⓘ |
| comparedTo | Michelson interferometer ⓘ |
| dataAnalysisMethod |
fringe counting
ⓘ
fringe pattern imaging ⓘ phase shifting interferometry ⓘ |
| field |
experimental physics
ⓘ
optics ⓘ |
| fringePatternDependsOn |
surface separation
ⓘ
surface shape ⓘ wavelength of light ⓘ |
| hasAdvantage |
direct comparison of test surface to reference surface
ⓘ
simple alignment for surface testing ⓘ |
| hasComponent |
beam splitter
ⓘ
coherent light source ⓘ detector ⓘ imaging system ⓘ reference surface ⓘ test surface ⓘ |
| measurementMethod | analysis of interference fringes ⓘ |
| measures |
distance
ⓘ
optical path difference ⓘ refractive index ⓘ surface flatness ⓘ surface shape ⓘ |
| namedAfter | Hippolyte Fizeau ⓘ |
| operatesIn | reflection mode ⓘ |
| requires |
highly polished surfaces
ⓘ
monochromatic light ⓘ stable alignment ⓘ |
| typicalConfiguration |
partially reflecting reference plate
ⓘ
two closely spaced reflecting surfaces ⓘ |
| usedIn |
lens testing
ⓘ
mirror testing ⓘ optical metrology ⓘ precision engineering ⓘ refractive index measurement ⓘ surface testing ⓘ |
| usesMedium | light ⓘ |
| usesPhysicalPrinciple |
optical interference
ⓘ
wave superposition ⓘ |
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: Fizeau interferometer Description of subject: The Fizeau interferometer is an optical instrument that uses the interference of light reflected between closely spaced surfaces to make highly precise measurements of distances, surface flatness, and refractive index.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.