It is easy to measure length accurately by means of optical interferometry. However, the
measurement range of a single-frequency interferometer is limited to less than half the …

Optical interference plays a prominent role in scientific discovery and modern technology.
Historically, optical interference was instrumental in establishing the wave nature of light …

Methods and systems for a hybrid optical device for high dynamic range high resolution
remote sensing of object distance, object motion displacement, object three dimensional …

The basic principle of frequency-modulated continuous-wave lidars is to measure the
velocity of a moving object through the Doppler frequency shift phenomenon. However, the …

The optical length of a 1 m Fabry-Pérot etalon has been determined by swept-frequency
interferometry using laser diodes. The method involves progressively building up the …

A measurement technique is proposed based on dispersive interferometry using a comb-
spectrum source: dispersive comb-spectrum interferometry (DCSI). The configuration …

We present the principle of optical frequency modulation via the Doppler effect obtained by
rapidly stretching an optical fiber and thus modifying the optical path of the light propagating …

A gauge block measurement system that uses a wavelength scanning interferometer was
developed. By using a wavelength scanning technique, we determined the integer part of …

We propose an interferometer in which the relationship between the degree of coherence
(DCH) and the optical path difference (OPD) is utilized for determining an OPD longer than a …

A new type of tomography system based on optical frequency-domain reflectometry is
presented. Using an area sensor, the system can simultaneously measure three …