Agilent Technologies 8453 Operator's Manual page 10

1 Introduction to Your System
Agilent 8453 Spectrophotometer — Overview
Agilent 8453 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
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 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.
10 Agilent 8453 UV-visible Spectroscopy System Operator's Manual
Figure 1. Its