TERMIUM Plus®
From: Translation Bureau
On social media
Consult the Government of Canada’s terminology data bank.
ZPD [2 records]
Record 1 - internal organization data 2013-12-04
Record 1, English
Record 1, Subject field(s)
- Optics
- Remote Sensing
Record 1, Main entry term, English
- zero path difference
1, record 1, English, zero%20path%20difference
correct
Record 1, Abbreviations, English
- ZPD 2, record 1, English, ZPD
correct
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
The expression "zero path difference" or ZPD is used to describe the location of the moving mirrors such that the two arms of the interferometer are of equal optical path length. At ZPD, the interference is constructive for every wavelengths and the interferogram is at its absolute maximum in one of the output port(and thus at its absolute minimum in the other output port). 3, record 1, English, - zero%20path%20difference
Record 1, French
Record 1, Domaine(s)
- Optique
- Télédétection
Record 1, Main entry term, French
- différence de marche nulle
1, record 1, French, diff%C3%A9rence%20de%20marche%20nulle
correct, feminine noun
Record 1, Abbreviations, French
- ZPD 1, record 1, French, ZPD
correct, feminine noun
Record 1, Synonyms, French
Record 1, Textual support, French
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2013-12-04
Record 2, English
Record 2, Subject field(s)
- Optics
- Remote Sensing
Record 2, Main entry term, English
- maximum path difference
1, record 2, English, maximum%20path%20difference
correct
Record 2, Abbreviations, English
- MPD 1, record 2, English, MPD
correct
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 DEF
The maximum distance between a mirror and ZPD [zero path difference]. 1, record 2, English, - maximum%20path%20difference
Record number: 2, Textual support number: 1 OBS
It is half the maximum effective distance between the two mirrors of the interferometer. 1, record 2, English, - maximum%20path%20difference
Record 2, French
Record 2, Domaine(s)
- Optique
- Télédétection
Record 2, Main entry term, French
- différence de marche maximale
1, record 2, French, diff%C3%A9rence%20de%20marche%20maximale
correct, feminine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
Le spectre initial est mieux reproduit lorsque l'interférogramme est obtenu avec une grande différence de marche maximale. 1, record 2, French, - diff%C3%A9rence%20de%20marche%20maximale
Record 2, Spanish
Record 2, Textual support, Spanish
Copyright notice for the TERMIUM Plus® data bank
© Public Services and Procurement Canada, 2026
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau
Features
GCtranslate (available on the Government of Canada network only)
Use this artificial intelligence prototype to translate Government of Canada content up to and including Protected B. Available to employees of selected departments and agencies only.
Writing tools
The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.
Glossaries and vocabularies
Access Translation Bureau glossaries and vocabularies.
- Date Modified:


