Abstract

In the course of an investigation of adsorbed water, and hydroxyl groups, we wished to obtain near-infrared spectra from silica powders. Although it was clear that diffuse reflectance techniques would satisfy our requirements, no combination of spectrometer and reflectance accessory suitable for use in the range of principal interest (1–3 μ) was available to us. Because we had access to a Cary Model 14 RI spectrophotometer, it seemed most reasonable to consider modification of the reflectance accessories available for this instrument. The purpose of this note is to describe the approach adopted, the results achieved, and the possibilities of improving the system further.

Simple Absolute Method for Measuring Diffuse Reflectance Spectra

Kazuo Shibata
J. Opt. Soc. Am. 47(2) 172-175 (1957)

An Integrating Sphere for Measuring Diffuse Reflectance in the Near Infrared

John A. Jacquez, Wayne McKeehan, John Huss, James M. Dimitroff, and Hans F. Kuppenheim
J. Opt. Soc. Am. 45(10) 781-785 (1955)

Methods for quantitative infrared directional-hemispherical and diffuse reflectance measurements using an FTIR and a commercial integrating sphere

Thomas A. Blake, Timothy J. Johnson, Russell G. Tonkyn, Brenda M. Forland, Tanya L. Myers, Carolyn S. Brauer, Yin-Fong Su, Bruce E. Bernacki, Leonard Hanssen, and Gerardo Gonzalez
Appl. Opt. 57(3) 432-446 (2018)

Polarized near-infrared autofluorescence imaging combined with near-infrared diffuse reflectance imaging for improving colonic cancer detection

Xiaozhuo Shao, Wei Zheng, and Zhiwei Huang
Opt. Express 18(23) 24293-24300 (2010)

Optical diffuse reflectance accessory for measurements of skin tissue by near-infrared spectroscopy

R. Marbach and H. M. Heise
Appl. Opt. 34(4) 610-621 (1995)