Optical Reflectance Measurements for Commonly Used Reflectors

DIFFUSE REFLECTANCE MEASUREMENTS FROM DIFFERENT SURFACES

Relative diffuse reflection measurements from the original and ground surfaces using a He-Ne laser are reported. The intensity measurements for the metallic, transparent dielectric, matte plastic surfaces and colored papers are presented. Our results indicate that among metallic surfaces tested, aluminum has the highest diffuse reflectance; while the original stainless steel surface shows the l...

Reflectance Mapping of Semiconductor Distributed Bragg Reflectors

We describe the design, construction and performance evaluation of a spectrally resolved reflectance mapping setup. The setup is capable of mapping a full 2 inch diameter semiconductor wafer, with a best spatial resolution of 50μm. The operating wavelength range is from 0.35μm to 1.05μm with spectral resolution of ~1nm. We have used this setup for reflectance mapping studies on distributed Brag...

Commonly Used Distributions

Correlative studies in optical reflectance measurements of cerebral blood oxygenation

A numerical study is made of correlation development for measuring cerebral blood oxygen saturation (StO) noninvasively using optical reflectance ratio of dual wavelengths. The Monte Carlo (MC) method was used for simulating reflectance measurements in a model neck tissue, where the cerebral blood oxygenation was monitored through the blood flows in the common carotid artery (CCA) and jugular v...

Comparison of stroke volume and fluid responsiveness measurements in commonly used technologies for goal-directed therapy.

STUDY OBJECTIVE To compare stroke volume (SV) and preload responsiveness measurements from different technologies with the esophageal Doppler monitor (EDM). DESIGN Prospective measurement study. SETTING Operating room. PATIENTS 20 ASA physical status 3 patients undergoing vascular, major urological, and bariatric surgery. INTERVENTIONS Subjects received fluids using a standard Doppler p...