Talbot effect
E656399
The Talbot effect is a near-field optical phenomenon in which a periodic structure illuminated by coherent light produces self-images at regular intervals along the propagation direction.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Talbot effect canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7329920 — 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: Talbot effect Context triple: [Kapitza–Dirac effect, relatedTo, Talbot effect]
-
A.
Kapitza–Dirac effect
The Kapitza–Dirac effect is a quantum phenomenon in which a beam of particles, such as electrons or atoms, is diffracted by a standing wave of light, demonstrating the wave-particle duality of matter.
-
B.
Poisson spot
Poisson spot is a bright point of light that appears at the center of the shadow of a circular object due to wave diffraction, providing striking evidence for the wave nature of light.
-
C.
Segré–Silberberg effect
The Segré–Silberberg effect is a fluid dynamics phenomenon in which particles suspended in laminar flow through a circular tube migrate to stable equilibrium positions at a characteristic radial distance from the tube wall.
-
D.
Cotton–Mouton effect
The Cotton–Mouton effect is a magneto-optical phenomenon in which a transverse magnetic field induces birefringence in an otherwise isotropic medium, causing the polarization of transmitted light to change.
-
E.
Szilard–Chalmers effect
The Szilard–Chalmers effect is a nuclear chemistry phenomenon in which atoms that undergo neutron capture and become radioactive are chemically separated from their original, non-activated atoms due to recoil-induced disruption of their chemical bonds.
- 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: Talbot effect Target entity description: The Talbot effect is a near-field optical phenomenon in which a periodic structure illuminated by coherent light produces self-images at regular intervals along the propagation direction.
-
A.
Kapitza–Dirac effect
The Kapitza–Dirac effect is a quantum phenomenon in which a beam of particles, such as electrons or atoms, is diffracted by a standing wave of light, demonstrating the wave-particle duality of matter.
-
B.
Poisson spot
Poisson spot is a bright point of light that appears at the center of the shadow of a circular object due to wave diffraction, providing striking evidence for the wave nature of light.
-
C.
Segré–Silberberg effect
The Segré–Silberberg effect is a fluid dynamics phenomenon in which particles suspended in laminar flow through a circular tube migrate to stable equilibrium positions at a characteristic radial distance from the tube wall.
-
D.
Cotton–Mouton effect
The Cotton–Mouton effect is a magneto-optical phenomenon in which a transverse magnetic field induces birefringence in an otherwise isotropic medium, causing the polarization of transmitted light to change.
-
E.
Szilard–Chalmers effect
The Szilard–Chalmers effect is a nuclear chemistry phenomenon in which atoms that undergo neutron capture and become radioactive are chemically separated from their original, non-activated atoms due to recoil-induced disruption of their chemical bonds.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
near-field diffraction effect
ⓘ
optical phenomenon ⓘ self-imaging effect ⓘ |
| alsoKnownAs | Talbot self-imaging effect NERFINISHED ⓘ |
| appliesTo |
gratings
ⓘ
periodic amplitude structures ⓘ periodic phase structures ⓘ |
| basedOn |
Fresnel diffraction
NERFINISHED
ⓘ
wave interference ⓘ |
| characterizedBy |
Talbot distance
NERFINISHED
ⓘ
repetition of images at regular longitudinal intervals ⓘ |
| dependsOn |
period of the structure
ⓘ
propagation distance ⓘ wavelength of light ⓘ |
| describes | self-imaging of periodic structures under coherent illumination ⓘ |
| discoveredBy | Henry Fox Talbot NERFINISHED ⓘ |
| discoveredIn | 1836 ⓘ |
| domain | classical optics ⓘ |
| exhibits | fractional Talbot images at rational fractions of the Talbot distance ⓘ |
| field |
optics
ⓘ
physical optics ⓘ wave optics ⓘ |
| generalizedTo |
atomic beams
ⓘ
electron waves ⓘ matter waves ⓘ |
| hasQuantity | Talbot length NERFINISHED ⓘ |
| hasVariant |
Talbot-Lau effect
NERFINISHED
ⓘ
fractional Talbot effect NERFINISHED ⓘ quantum Talbot effect NERFINISHED ⓘ temporal Talbot effect NERFINISHED ⓘ |
| isTypeOf |
diffraction phenomenon
ⓘ
self-imaging phenomenon ⓘ |
| namedAfter | Henry Fox Talbot NERFINISHED ⓘ |
| occursIn | near field ⓘ |
| occursWhen | a periodic structure is illuminated by coherent light ⓘ |
| produces |
repeated intensity patterns along the propagation direction
ⓘ
self-images of the periodic structure ⓘ |
| requires |
coherent illumination
ⓘ
periodic structure ⓘ |
| TalbotLengthFormula | z_T = 2 a^2 / λ for a 1D grating in paraxial approximation ⓘ |
| usedIn |
beam shaping
ⓘ
matter-wave interferometry ⓘ optical imaging ⓘ optical information processing ⓘ optical lithography ⓘ optical metrology ⓘ x-ray optics ⓘ |
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: Talbot effect Description of subject: The Talbot effect is a near-field optical phenomenon in which a periodic structure illuminated by coherent light produces self-images at regular intervals along the propagation direction.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.