This document describes how to measure small sample relative % reflectance using Cary 50 spectrophotometer
The document details an experiment measuring the relative % reflectance of small electro-optic devices recovered from CD drives. The setup utilizes a standard Cary 50 instrument fitted with a high precision Eclipse cell holder and the Hellma TrayCell accessory.
Measurements were performed using the instrument's standard scan software module to record a baseline (100%R) against the TrayCell standard mirror or an alternative calibrated reference mirror. Results demonstrate that this combination provides acceptable precision for small samples difficult to measure with conventional reflectance accessories, showing a measured variance of about 0.4% on a narrow peak.
The document tested small electro-optic devices recovered from CD drives, specifically beamsplitters.
The measured variance was about 0.4% Reflectance on the narrow 438 nm peak.
The software allows setting a start wavelength of 200 nm and a stop wavelength of 2000 nm.