Waters ACQUITY UPC2, Обзор и руководство по обслуживанию, Страница: 7 / 84

Overview 3
Flow cell Houses the segment of the flow path (containing eluent
and sample) through which the polychromatic light
beam passes.
Grating Blazed, holographic diffraction grating that disperses
light into bands of wavelengths and focuses them onto
the plane of the photodiode array.
Lamp and lamp
optics
Focuses light from the high-brightness deuterium (D
2
)
source lamp and, via a mirror, redirects the light
through a beam splitter and then to the flow cell.
M1 mirror Off-axis, ellipsoidal mirror that projects light from the
lamp into the flow cell.
Order filter Reduces the contribution of second-order diffraction of
UV light (less than 370 nm) to the light intensity
observed at visible wavelengths (greater than 370 nm).
Photodiode array An array of 512-pixel photodiodes arranged linearly.
The diode width (50- μ m), together with a 50- μ m slit,
yield single wavelength resolution of 1.2 nm.
Slit Determines wavelength resolution and intensity of
light striking the photodiodes. The width of the slit is
50 μ m.
Spectrograph
mirror and mask
The mirror focuses light transmitted through the flow
cell onto the slit at the entrance to the spectrographic
portion of the optics. The mirror mask defines the size
of the beam at the grating.
Window Used to help minimize air infiltration into the lamp
housing.
Optics assembly components: (Continued)
Component Function