Lambda 25, 35, 45 User’s Guide
46
Optics
Beam center height 15 mm above cell holder bottom
Beam cross-section
0.5 nm slit ca. 0.25 mm x 7 mm (width x height)
1 nm slit ca. 0.5 mm x 7.5 mm (width x height)
2 nm slit ca. 1 mm x 7.5 mm (width x height)
4 nm 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 ±0.1 nm
Wavelength reproducibility ±0.1 nm
Spectral bandwidth
0.5 nm, 1 nm, 2 nm, 4 nm
(selectable fixed slit widths)
Lamp change
Automatically at 326 nm
(software selectable over the whole wavelength range)
Scan speeds
7.5, 15, 30 , 60, 120, 240, 480, 960, 1920 and 2880
nm/min
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