Agilent Cary 8454 Uv-Visible Spectrophotometer - Overview; Optical System Overview - Agilent Technologies Cary 8454 Operator's Manual

2 Introduction to Your System
Agilent Cary 8454 UV-Visible Spectrophotometer — Overview
Agilent Cary 8454 UV-Visible Spectrophotometer — Overview
This section gives an overview of the optical system and explains the
spectrophotometer front and back panels. It also explains the layout and
construction of the spectrophotometer including the electronic and
mechanical assemblies inside the spectrophotometer.

Optical System Overview

Optical System
The optical system of the spectrophotometer is shown in Figure 1. Its
radiation source is a combination of a deuterium-discharge lamp for the
ultraviolet (UV) wavelength range, and a tungsten lamp for the visible and
short wave near-infrared (SWNIR) wavelength range. The image of the
filament of the tungsten lamp is focused on the discharge aperture of the
deuterium lamp by means of a special rear-access lamp design which allows
both light sources to be optically combined and to share a common axis to the
source lens. The source lens forms a single, collimated beam of light. The beam
passes through the shutter/stray-light correction filter area then through the
sample to the spectrograph lens and slit. In the spectrograph, light is
dispersed onto the diode array by a holographic grating. This allows
simultaneous access to all wavelength information. The result is a
fundamental increase in the rate at which spectra can be acquired.
22 Agilent Cary 8454 UV-Visible Spectroscopy System Operator's Manual