Bayer HealthCare RapidPoint 400 Series Service Manual page 61

• fiber bundle
• diffraction grating
• grating imaging mirror
• collimating mirror
• diode array PC board
• polychromator PC board
The fiber bundle carries light collected by the optics head after passing
through the sample and relays it to the polychromator. The fibers at the end
of the fiber bundle form a line that defines the input slit to the polychromator.
The first mirror collimates light from the slit so that nearly parallel light falls
on the diffraction grating. The diffraction grating disperses the light coming
from the collimating mirror into its component wavelengths or colors. The
second mirror images the light from the grating onto the photodiode array
detector where the various wavelength intensities are measured.
The diode array board converts light into an electrical signal. The
polychromator board converts the signal from the diode array board from
an analog to a digital value for further processing.
Rev. C Mechanical Descriptions 61