V-550/560/570 Spectrophotometers Optical System; 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
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.
Figure 2.3 V-550 Optical system
9
) lamp (190 to 350
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