{"term":{"id":"08581","title":"continuous scan interferometer","longtitle":"IUPAC Gold Book - continuous scan interferometer","doi":"10.1351\/goldbook.08581","code":"08581","status":"current","definitions":[{"id":1,"text":"Interferometer in which the optical path difference is continually changed.","notes":{"1":"Continuous scan interferometer is typically used for Fourier-transform infrared spectroscopy.","2":"In slow scan interferometers, the rate of change of optical path difference is less than \\(\\pu{0.05 cm s-1}\\) and a mechanical chopper or some other ancillary modulation is frequently used to provide an adequate modulation frequency.","3":"In rapid-scan interferometers, the rate of change of optical path difference is above \\(\\pu{0.05 cm s-1}\\), high enough that no additional modulation is needed."},"links":[{"term":"Fourier-transform infrared spectroscopy","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/08605"},{"term":"optical path difference","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/08653"},{"term":"step-scan interferometer","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/08681"}],"sources":["PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 741 (https:\/\/doi.org\/10.1515\/pac-2019-0203)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/08581\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/08581\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/08581\/plain"},"citation":"Citation: 'continuous scan interferometer' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351\/goldbook.08581","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2026-06-28T15:59:10+00:00"}}