Agilent Technologies 1260 Infinity User Manual page 16

1
Introduction to the Variable Wavelength Detector
Mirror Assemblies M1 and M2
The instrument contains two spherical mirrors (M1 and M2). The beam
adjustable is vertically and horizontally. Both mirrors are identical.
Grating Assembly
The grating separates the light beam into all its component wavelengths and
reflects the light onto mirror #2.
Beam Splitter Assembly
The beam splitter splits the light beam. One part goes directly to the sample
diode. The other part of the light beam goes to the reference diode.
Photo Diodes Assemblies
Two photo diode assemblies are installed in the optical unit. The sample diode
assembly is located on the left side of the optical unit. The reference diode
assembly is located in the front of the optical unit.
Photo Diode ADC (analog-to-digital converter)
The photo diode current is directly converted to 20-bit digital data direct
photo current digitalization. The data is transferred to the detector main
board (VWM). The photo diode ADC boards are located close to the photo
diodes.
16 Agilent 1260 Infinity Variable Wavelength Detector User Manual