270M
Rapid Scanning Imaging Spectrograph
1 O
Application
Examples:
The 270M is quite versatile, and may be operated in various ways, depending on the
measurement and the requirements of associated equipment such as detectors.
Following are a few representative operating examples for typical uses.
10.1
As
a
Monochromatic
llluminator:
With a
broadband light
source directly
coupled to an
entrance slit, the
270M can
provide a specific
bandpass at the
exit. The spectral
bandpass can be
varied by
changing the slit
widths. The scan
drive facilitates
tuning
or
selecting the
central
wavelength
of
the exiting beam.
One might wish
270M
MONOCHROMATOR
PS
200
1682
SOURCE
HOUSING
to
alternately Figure 14:
270M
as
a Monochromatic llluminator
illuminate MAN002s
samples with two
wavelengths
of
light
to
perform two measurements, let's say transmission- at 580 nm,
and fluorescence excited by 400 nm light.
The 270M's imaging optics maintain a small illumination spot size at the exit.
(Traditional designs spread the spot, reducing its intensity. This is due
to
aberrations
that are eliminated
by
the 270M design.) For the two measurements the band passes
can be optimized independently. Under computer control the motorized slits change
as programmed. The high speed drive minimizes slewing time.
36
Revised November 24.
1992
Leica Microsystems, Inc.'s Ex. 1033
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