Ocean Optics DTS - Manual (Page 11)

Introduction
Polychromix DTS TM Near-Infrared Spectrometer 1-3
Operator’s Manual
Document Number 04-91-0201-00 Rev A
1.2 Description of the Spectrometer
The mode of operation of the detector involves the dispersion of the spectrum
using a standard fixed grating. Each spectral component from the fixed
grating is then imaged onto a pixel region of a microelectromechanical
(MEMS) micro-diffraction grating which is programmed to selectively filter the
light that is directed to a single InGaAs detector. Digital transform encoding is
employed; in this system, a series of 100 pixels are actuated in a sequence of
100 filter masks. Each mask consists of a combination of 50 pixels that are
“on” and 50 pixels that are “off”, thereby providing a 50 % optical throughput,
and sharing an advantage that is employed in Fourier transform infra-red
spectroscopy.
1.3 Hardware connections
The Polychromix DTS™ has two input connectors: (1) a FSMA receptacle
which accepts a fiber optic cable with a standard SMA-905 connector and (2)
a USB mini-B port which connects to a USB host via a standard USB cable.
1.4 Overview of the Manual
This manual consists of the following information:
•
Chapter 2 Installation – Describes the receipt of the instrument,
interfacing it to other components of the system and environmental
considerations.
•
Chapter 3 Quick Start – Presents a sample experiment to demonstrate
that the spectrometer is operating properly.
•
Chapter 4 The SpectralCode Application Program – Includes a
detailed description of the operating program.
•
Chapter 5 Collecting Spectra and Manipulating Data – Describes how
the SpectralCode TM operating program is employed to collect and process
spectroscopic data.
•
Chapter 6 Measuring the Spectrum of a Sample – Discusses how data
is collected using the spectrometer and discusses sample handling.
•
Chapter 7 Maintenance and Troubleshooting – Presents information
about routine operations to optimize the utility of the spectrometer.
An appendix that lists the spectrometer specifications is included.