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
220
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 December
10,
1992
Leica Microsystems, Inc.'s Ex. 1033
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