PerkinElmer AVIO 500, Customer Hardware And Service Manual

Page: 100 / 355

98
System Description
system has excellent resolution with a relatively short focal length. Also, since
multiple orders are used (higher orders in the UV and lower orders in the visible),
the resolution also changes as a function of wavelength (see the following figure).
Figure 3-10. Comparison showing resolution for a sampling of data points at
different wavelengths.
UV Module
The UV module consists of a cross disperser, a camera sphere, a fold flat mirror, a
field flattener, and the detector module. On the Avio 500 the overlapping orders
from the echelle grating are sent to a Schmidt cross disperser.
Schmidt Cross Disperser
The Schmidt Cross Disperser serves three purposes in the optical system. First, the
Schmidt cross disperser separates the light into the visible and UV channels. Light
Item Description
1 Bandwidth FWHM (nm)
2 Wavelength
1
2