Proceedings

OPTICAL MEASUREMENT TECHNIQUES USING DAMMANN GRATINGS

Optical measurement techniques using Dammann gratings and deep-etched gratings are reported. Dammann grating is a digital binary-phase diffractive optical element that can produce multiple equal intensitites in different diffractive orders. Three-dimensional objects can be measured using a Dammann grating when its surface deforms the lattice of the illumination array that is produced by a Dammann grating. A structure of three Dammann gratings can be used to characterize the ultrashort femtosecond laser pulse where one grating is used to split the ultrashort femtosecond laser pulse while the...

DRAMATIC IMPACT OF END-FACE-TIR AND MODE MIXING ON SIGNAL COLLECTION OF A FIBER-OPTIC EVANESCENT WAVE SENSING PLATFORM

In this paper, for the first time, we report that for a specific fiber-optic evanescent wave (EW) sensing architecture we proposed before, the total internal reflection of fluorescent signal power occurred at the fiber end face will experience enormous mode mixing when encountering roughened end face. As a result, 94% of the overall detectable power will be contributed by this effect. For a smooth fiber end face, this figure becomes mere 52%. We will interpret the mechanism behind these unusual phenomena and its significance for the performance enhancement of fiber-optic EW sensor.

DISCUSSION ON CALIBRATION RESULTS FOR ALTERNATING TORQUE IN COMPARISON WITH SINGLE CW AND ACW TORQUE CALIBRATIONS

ABOUT THE INFLUENCES ON THE CALIBRATION RESULTS OBTAINED ON CALIBRATION SYSTEMS WITH SUPPORTED OR UNSUPPORTED BEAMS

MEASUREMENT, BACKACTION, AND FUTURE STANDARD IN ULTRA-SMALL FORCE METROLOGY

THE ACTIVITIES OF MICRO-FORCE MEASUREMENT BELOW 10 µN IN CENTER FOR MEASUREMENT STANDARDS

THE CURRENT STATUS AND PERSPECTIVE ON LOW FORCE METROLOGY IN KOREA

LOW FORCE METROLOGY AT THE NATIONAL PHYSICAL LABORATORY, UK

MICRO- AND NANOFORCE METROLOGY AT PTB

CALIBRATION OF A FORCE VECTOR SENSOR WITH A MULTICOMPONENT CALIBRATION SYSTEM