The Thomson scattering diagnostic on the Madison Symmetric Torus (MST) records excessive levels of stray Nd:YAG laser light. Stray light saturates the 1064 nm spectral channel in all polychromators, which prevents absolute electron density measurements via Rayleigh scattering calibration. Furthermore, stray light contaminates adjacent spectral channels for r/a ≥ 0.75, which renders the diagnost...

Duct-profiling in test samples up to 25 mm in diameter has been demonstrated using a passive, low-coherence probe head with a depth resolution of 7.8 μm, incorporating an optical-fibre-linked conical mirror addressed by a custom-built array of single-mode fibres. Zemax modelling, and experimental assessment of instrument performance, show that degradation of focus, resulting from astigmatism in...

Abstract The geometrical aberration of an optical system is usually measured through wavefront aberration. We propose a very direct experimental ray-tracing measurement method in this paper. Two fiber point-light-sources are used to simulate arbitrary incident ray space, the diffracting wavefronts two fibers pass lens under test and interfere on photographic planes. outgoing intersects planes a...

Abstract In this study, we present a novel Visible Light Positioning (VLP) method to reduce the localization error in an indoor environment. Machine Learning (ML) methods including Decision Tree (DT), Support Vector (SVM), and Neural Networks (NNs) are used combination with LED Received Signal Strength (RSS) angle of steerable laser. Zemax optics studio simulator is build real scene. Orange dat...

We propose an off-axis flight vision display system design with a free-form surface using machine learning to simulate the visual distance variation during take-off and landing training for pilots. This is realized by ray tracing ZEMAX software, where we build optimize series of initial systems that meet corresponding optical specifications. A deep neural network used train regression model, wh...

An integrated direct-reading spectrometer scheme using seven concave gratings is proposed. At present, the optical design simulation has been completed, and subsequent physical may be carried out according to results. Ray-tracing software (Zemax) used divide spectrum on grating into bands, an area array detector receive spectral signals simultaneously, which reduces volume of improves consisten...

This paper reports the characterization of two scintillating materials in powder form, Gadox and YVO embedded a light-activated resin, used probe developed for oncological brachytherapy in-vivo dosimetry. The were characterized terms internal absorption, scintillation decay time, light yield. measurement optical characteristics highlighted significant absorption at wavelength, with values 6.5 d...