90088262 MCS130B
CORNERSTONE 130B MONOCHROMATORS
36
11
10B
GRATING INSTALLATION AND CALIBRATION
Grating installation and field calibration are typically performed at one of Newport’s manufacturing
locations, or by qualified field service personnel. The instructions provided in this section are for
advanced users only.
11.1
45B
RECALIBRATION SERVICES
Newport suggests that monochromators be returned annually for service. This is to
prolong the
life of the instrument so it can continue to provide repeatable, high-performance results.
In
addition to verifying the calibration, the instrument would be fully inspected. Any refurbishment
required would be included in the servicing of the instrument.
11.2
46B
SETTING THE WAVELENGTH OFFSET
A wavelength offset is used to shift the wavelength position to either a higher or a lower
wavelength. For example, if a HeNe laser operating at 632.8 nm is sent through the
monochromator and the output is visible when the monochromator is set to 640 nm, an offset c an
be introduced.
When performing this procedure, it is necessary to use a light source with a known spec tral line
appearing within the operating range of the grating. Oriel offers a number of pencil calibration
lamps for this purpose, such as the model 6035 Hg lamp. Another line source such as a laser may
also be used. Always be sure to follow the appropriate safety precautions when dealing wit h any
light source.
Procedure:
1. Select a radiation source that has at least one narrow spectral line in the
wavelength region of interest.
2. Select a detector with an operating range appropriate for the spectral line.
3. Focus the radiation onto the entrance slit (the monochromator is F/3.9). Note t hat
a narrower slit provides greater resolution.
4.
Ensure the focused beam is parallel to the monochromator’s optical axis.
5. Command the monochromator to select the grating for which the offset is to be
applied.
6. Use the STEP command to move the grating position until the spectral line is
visible at the output.
7. Use the CALIBRATE command to enter the exact wavelength of the spectral line.
The Cornerstone wavelength offset has now been entered into memory. This
offset applies to all other wavelength positions when using this grating.
8. Repeat the process for the second grating, if required.
Summary of Contents for Cornerstone 130B
Page 1: ...90088262MCS130B Rev B s 1 8m Monochromator Family User s Manual Cornerstone 130B...
Page 32: ...90088262 MCS130B CORNERSTONE 130B MONOCHROMATORS 32 Figure 23 Model 74010 Filter Wheel...
Page 44: ...90088262 MCS130B CORNERSTONE 130B MONOCHROMATORS 44 Figure 33 Model 74006 Mounting Plate...
