Lambda 20, Lambda 40 UV/Vis Spectrometers
88
Optics
Beam center height 15 mm above cell holder bottom
Beam cross-section
0.5 mm slit ca. 0.25 mm x 7 mm (width x height)
1 mm slit ca. 0.6 mm x 7.5 mm (width x height)
2 mm slit ca. 1 mm x 7.5 mm (width x height)
4 mm slit ca 2 mm x 7.5 mm (width x height),
at focal point of sample and reference beam in
sample compartment
Optical pathlength in
sample compartment
121 mm
Grating (Monochromator)
Holographic concave grating with 1053 lines/mm
in the center
Radiation sources Prealigned deuterium and halogen lamps
Detector
Photodiodes
(One for the sample beam and one for the reference
beam)
Abscissa
Wavelength range
190 nm to 1100 nm;
0 nm for alignment purposes
Wavelength accuracy ±0.3 nm
Wavelength reproducibility ±0.1 nm
Spectral bandwidth
0.5 nm, 1 nm, 2 nm, 4 nm
(selectable fixed slit widths)
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