8453 UV-visible system - operator manual.pdf

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Agilent 8453 Spectrophotometer — OverviewThis section gives an overview of the optical system and explains thespectrophotometer front and back panels. It also explains the layout andconstruction of the spectrophotometer including the electronic andmechanical assemblies inside the spectrophotometer.This overview contains:• “Optical System Overview” on page 11• “Spectrophotometer Description” on page 1410
Introduction to Your SystemOptical System OverviewOptical System OverviewOptical SystemThe optical system of the spectrophotometer is shown in Figure 1. Itsradiation source is a combination of a deuterium-discharge lamp for theultraviolet (UV) wavelength range and a tungsten lamp for the visible andshort wave near-infrared (SWNIR) wavelength range. The image of thefilament of the tungsten lamp is focused on the discharge aperture of thedeuterium lamp by means of a special rear-access lamp design which allowsboth light sources to be optically combined and share a common axis to thesource lens. The source lens forms a single, collimated beam of light. Thebeam passes through the shutter/stray-light correction filter area thenthrough the sample to the spectrograph lens and slit. In the spectrographlight is dispersed onto the diode array by a holographic grating. This allowssimultaneous access to all wavelength information. The result is afundamental increase in the rate at which spectra can be acquired.Figure 1Optical System of SpectrophotometerCuvetteSource lensSlitGratingShutter/straylight filterTungstenlampDeuteriumlampSource lensPhoto diodearrayLampsThe light source for the UV wavelength range is a deuterium lamp with ashine-through aperture. As a result of plasma discharge in a low pressuredeuterium gas, the lamp emits light over the 190 nm to approximately 800 nmwavelength range. The light source for the visible and SWNIR wavelengthrange is a low-noise tungsten lamp. This lamp emits light over the 370 nm to1100 nm wavelength range.11
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Page 5 and 6: Contents1 Introduction to Your Syst
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Page 13 and 14: Introduction to Your SystemOptical
Page 15 and 16: Introduction to Your SystemSpectrop
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Page 19 and 20: Introduction to Your SystemUser Int
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Page 23 and 24: Introduction to Your SystemSoftware
Page 26: Introduction to Your SystemStandard
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Page 35 and 36: 22 Installation and Start UpSummary
Page 37 and 38: Installation and Start UpInstallati
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Page 41 and 42: 33 Good MeasurementPracticesGeneral
Page 43 and 44: Good Measurement PracticesGeneral C
Page 53 and 54: Good Measurement PracticesInserting
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IndexNumerics2,2,4-trimethylpentane
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Indexn-hexane, 48nominal spectral s
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s1In This BookTo be able to use you
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