270M
Rapid Scanning Imaging Spectrograph
6.2 Single Grating Mounts:
If your 270M has the standard single grating mount, each grating shipped with your
270M is mounted in a prealigned capsule. The first grating is shipped in the
instrument. Additional gratings are packed separately.
Normally, any grating that has been aligned in the instrument need not be realigned
each time it is installed.
In
the alignment section of this manual, there is a procedure
to
follow, should it become necessary.
The standard 220G single grating mount is shown in Figure
9.
To
remove the grating
from the instrument, hold the grating mount by the sides, being careful not to touch
the grating surface. The slotted leaf spring retainer at the rear
of
the mounting bracket
is pulled upward to disengage the stud on the back of the grating mount. Then the
mount and grating can be removed
as
a unit by withdrawing the stud through the
backup plate.
To prepare an additional mounted grating for installation, place it face-up on
an
uncluttered clean
surface. Carefully
peel tape off one
side
of
the grating
and, using the
tape on the other
side as a hinge,
swing the cover
up and away from
the grating.
Separate the
cover from the
grating. Grasp the
grating mount
and place it in the
instrument so that
. the stud passes
through the
keyhole slot in the
retainer spring,
and the three
contact points
GRASP
ON
SIDES
TO
HANDLE MOUNTED
GRATING
STUD
BACKUP
PLATE
PART
OF
THE
SPECTROMETER
ZZO
GRATING
MOUNT
LEAF
SPRING
RETAINER
KEYHOLE
SLOT
Figure 8:
220G
Single Grating Mount Installation
MAN0027
engage properly. The top point is rounded and fits into a cup at the top
of
the backup
plate in the instrument. At the bottom of the grating mount there is another rounded
24
Revised November
24,
1992
Leica Microsystems, Inc.'s Ex. 1033
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