M77781A
MS257
™ USB/RS232
MONOCHROMATOR AND SPECTROGRAPH
44
9 ACCESSORIES
9.1 GRATING TURRETS
The drive can control kinematically interchangeable grating turrets. The Oriel Instruments
patented Quadruple grating turret offers an unequaled degree of automation with no compromise
in optical performance. This high precision turret scans about the face of the selected grating, as
do traditional monochromators, thus offering the best resolution and light throughput over the
grating scan range. The grating selection mechanism uses a second motor perpendicular to the
scan axis, so it does not interfere with the accurate wavelength positioning of the grating. All
turrets require that the gratings be mounted, aligned and calibrated at the factory.
9.2 CONFIGURING THE MS257 FOR TURRET INSTALLATION
With an MS257, there is no need to configure the system for the turret type in use. MS257 will
recognize whether it has a Single or Quadruple grating turret.
The Single Grating Mount
The Single Grating Mount is a kinematic mount. It can be removed and re-installed without losing
the calibration. Each grating comes pre-aligned in a sturdy mount. The mount simply screws
down onto the drive. For detailed information about the Grating Turret installation see Section 3.3.
The Quadruple Grating Turret
The Quadruple Grating Turret is a kinematic mount, it can be removed and replaced without
losing the calibration. Up to four gratings come pre-aligned in a sturdy mount. The turret simply
screws down onto the drive. For detailed information regarding the Grating Turret installation,
refer to Section 3.3.
Figure 13: Quadruple Grating Turret
