Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Point_diffraction_interferometer> ?p ?o. }
Showing items 1 to 23 of
23
with 100 items per page.
- Point_diffraction_interferometer abstract "A point diffraction interferometer is a type of common path interferometer. Unlike an amplitude splitting interferometer, such as a Michelson, which separates out an unaberrated beam and interferes this with the test beam, a common path interferometer generates its own reference beam.The device is similar to a spatial filter. Incident light is focused onto a semi-transparent mask (about 0.1% transmission). In the centre of the mask there is a hole about the size of the Airy disc and the beam is focused onto this hole with a Fourier transforming lens. The zeroth order (the low frequencies in Fourier space) then passes through the hole and interferes with the rest of beam. The device is similar in operation to Zernike phase contrast microscopy. Since the device is self-referencing it can be used in environments with a lot of vibrations or when no reference beam is available such as in many adaptive optics scenarios.The main criticism of the device is that when the beam becomes too aberrated the low frequency terms no longer pass through the hole. Thus the reference beam changes and it becomes difficult to unwrap the phase. Also light efficiency of the device is quite low because of the mask.".
- Point_diffraction_interferometer wikiPageID "11764750".
- Point_diffraction_interferometer wikiPageRevisionID "482881140".
- Point_diffraction_interferometer hasPhotoCollection Point_diffraction_interferometer.
- Point_diffraction_interferometer subject Category:Interferometers.
- Point_diffraction_interferometer type Artifact100021939.
- Point_diffraction_interferometer type Device103183080.
- Point_diffraction_interferometer type Instrument103574816.
- Point_diffraction_interferometer type Instrumentality103575240.
- Point_diffraction_interferometer type Interferometer103578981.
- Point_diffraction_interferometer type Interferometers.
- Point_diffraction_interferometer type MeasuringInstrument103733925.
- Point_diffraction_interferometer type Object100002684.
- Point_diffraction_interferometer type PhysicalEntity100001930.
- Point_diffraction_interferometer type Whole100003553.
- Point_diffraction_interferometer comment "A point diffraction interferometer is a type of common path interferometer. Unlike an amplitude splitting interferometer, such as a Michelson, which separates out an unaberrated beam and interferes this with the test beam, a common path interferometer generates its own reference beam.The device is similar to a spatial filter. Incident light is focused onto a semi-transparent mask (about 0.1% transmission).".
- Point_diffraction_interferometer label "Point diffraction interferometer".
- Point_diffraction_interferometer sameAs m.02rrj25.
- Point_diffraction_interferometer sameAs Q7208202.
- Point_diffraction_interferometer sameAs Q7208202.
- Point_diffraction_interferometer sameAs Point_diffraction_interferometer.
- Point_diffraction_interferometer wasDerivedFrom Point_diffraction_interferometer?oldid=482881140.
- Point_diffraction_interferometer isPrimaryTopicOf Point_diffraction_interferometer.