V-550/560/570 Spectrophotometers Optical System - Jasco V-530 Hardware/Function Manual

2.2 V-550/560/570 Spectrophotometers Optical System

2.2.1 Optical System
Figures 2.3 through 2.5 show the optical systems of the V-550, V-560 and V–570
spectrophotometers, respectively. The V-550 and V-560 measure the absorption
spectrum of a sample at wavelengths in the range 190 to 900 nm and the V-570
measures the absorption spectrum of a sample at wavelengths in the range 190
to 2500 nm. In each model, the light sources used are a deuterium (D
(190 to 350 nm) for use in the ultraviolet region and Halogen (WI) lamp (340 to
2500 nm) for use in the VIS/NIR region. The light from the light source is
converged and enters the monochromator. It is dispersed by the grating in the
monochromator and the light passing through the exit slit is monochromated.
This light is split into two light paths by a sector mirror, one incident on the
sample to be measured and the other on the reference sample such as a solvent.
The light that has passed through the sample and reference sample is incident
on the photomultiplier tube or Pbs photoconductive cell.
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Fig 2.3 V-550 Optical system
9
) lamp
2
WI, D : Light source
2
M : Mirror
S : Slit
F : Filter
G : Grating
M8 : beam splitter
PM : Detector
Sam : Sample beam
Ref : Reference beam
W : window