Dual-wavelength spiral interferometry.
Opt Lett
; 49(12): 3516-3519, 2024 Jun 15.
Article
em En
| MEDLINE
| ID: mdl-38875659
ABSTRACT
Spiral interferometry acquires the topography of the sample and determines the elevation or depression of the sample structure by a single measurement. The method has advantages in simple measurements and stable optical setup due to the coaxial interferometer. However, the measurable axial range was limited by the wavelength of the light. Here, we demonstrate dual-wavelength spiral interferometry without a significant modification to the original setup of the spiral interferometry. The retrieved phase profile using a synthesized wavelength of 3.33â
µm enlarges the measurable axial range with a magnification factor of 6.2 compared with that measured by the light at 532â
nm.
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Base de dados:
MEDLINE
Idioma:
En
Revista:
Opt Lett
Ano de publicação:
2024
Tipo de documento:
Article