point diffraction interferometer

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Engineering, Manufacturing and Construction

Metroloogia terminibaas

ID 1200281 Last modified 07.11.2026

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Domain metrologymeasuring instruments

punktdifraktsiooniinterferentsimõõtur

PDI

point diffraction interferometer

PDI

ühisrada tüüpi interferentsimõõtur, mis eraldab aberratsioonita kiire ja segab seda testkiirega, genereerides oma võrdluskiire, mille juures test- ja võrdluskiir liiguvad sama rada pidi

common-path interferometer that separates an aberration-free beam and combines it with a test beam, generating its own reference beam, wherein the test beam and the reference beam travel along the same path

punktdifraktsiooniinterferentsimõõtur

Usage examples

Punktdifraktsiooniinterferentsimõõtur (PDI) on väärtuslik mõõtevahend optiliste või peegeldavate seadmete pindade absoluutsete omaduste mittepurustavaks mõõtmiseks. Tänu mõõturi ühise teekonnaga kiirtele pole vaja kasutada võrdlusoptikat, mis tavaliselt lisab uuritava objekti tegelikule pinnakujule omaenda pinnahälvetest tulenevaid moonutusi.

PDI abbreviation

point diffraction interferometer

Usage examples

A point diffraction interferometer (PDI) is valuable tool to measure absolute surface characteristics of an optical or reflective instruments non destructively. The common path design eliminates any need of having a reference optics, which are known to overlap the absolute surface form of a test object with its own surface form errors.

PDI abbreviation

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point diffraction interferometer

Terminological databases

Engineering, Manufacturing and Construction

Metroloogia terminibaas

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