Feasibility and analysis of a system of two in tandem interferometers for optical coherence tomography

Cerrotta, Santiago; Morel, Eneas N.; Torga, Jorge; Alvira, Fernando

doi:10.23919/rpic.2017.8214337

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…In this context, this chapter reports and discusses a simple and self-calibrated fiber-optic interferometric system based on the swept source optical coherence tomography (SS-OCT) technique, especially suitable when the measurement of large dimensions (several centimeters) is necessary as those ones involved in industrial metrological applications [32][33][34][35][36][37]. Its constituent parts are analyzed, and several applications are shown, including the measurement of several centimeter distances, characterization of multilayer structures, simultaneous determination of thickness of the wall, internal and external diameter of glass containers, thickness measurements in opaque samples (which allows the use of the system to perform profilometry of mechanical parts) or where the refractive index is unknown, etc.…”

Section: Introductionmentioning

confidence: 99%

OCT in Applications That Involve the Measurement of Large Dimensions

Russo¹,

Morel²,

Torga³

et al. 2020

Optical Coherence Tomography and Its Non-Medical Applications

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The application of optical coherence tomography (OCT) technique is not very common when measuring large dimensions is required. This type of measurements can be critical to achieve satisfactory results in the manufacturing process of precision parts. Components and structures ranging from submillimeter to several centimeters size can be found in many fields including automotive, aerospace, semiconductor, and data storage industries to name a few. In this chapter, an interferometric system based on the swept source optical coherence tomography (SS-OCT) technique, which has a wide measurement range and good axial resolution, is presented and its constituent parts are analyzed. The scheme includes a self-calibration stage based on fiber Bragg gratings (FBGs) that allows monitoring the spectral position of the light source in each scan, having the advantage of being a passive system that requires no additional electronic devices. Several applications of the system are described, including measurement of distances up to 17 cm, characterization of multilayer transparent and semitransparent structures, simultaneous determination of thickness of the wall, internal and external diameter of glass ampoules or similar containers, thickness measurements in opaque samples or where the refractive index is unknown, etc.

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Section: Introductionmentioning

confidence: 99%

OCT in Applications That Involve the Measurement of Large Dimensions

Russo¹,

Morel²,

Torga³

et al. 2020

Optical Coherence Tomography and Its Non-Medical Applications

View full text Add to dashboard Cite

show abstract

Long-range frequency domain low-coherence interferometry detector for industrial applications

2023

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A low-cost long-range frequency domain low-coherence interferometry (LCI) detector is presented: time Fourier domain LCI (TFD-LCI). Combining ideas of time domain and frequency domain techniques, the TFD-LCI detects the analog Fourier transform of the optical interference signal with no limitation for the maximum optical path, measuring the thickness of several centimeters with micrometer resolution. A complete characterization of the technique is presented with a mathematical demonstration, simulations, and experimental results. An evaluation of repeatability and accuracy is also included. Measurements of small and large monolayer and multilayer thicknesses were done. Characterization of the internal and external thicknesses of industrial products such as transparent packages and glass windshield is presented, showing the potentiality of TFD-LCI for industrial applications.

show abstract

Feasibility and analysis of a system of two in tandem interferometers for optical coherence tomography

Cited by 2 publications

References 6 publications

OCT in Applications That Involve the Measurement of Large Dimensions

OCT in Applications That Involve the Measurement of Large Dimensions

Long-range frequency domain low-coherence interferometry detector for industrial applications

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