PerkinElmer Spotlight 400 Series, User Manual

Page: 81 / 120

Techniques for Collecting IR Images and Spectra . 81
Measuring the Energy in Reflectance Mode
1. Make sure that your spectrometer is switched on, and the source has warmed up.
2. Make sure that the imager, PC, and stage controller are switched on and that
SpectrumIMAGE software is running on your PC.
3. Place the slide holding the reference mirror (supplied with the imager) on the sample
stage.
4. Make sure
Point mode
is selected on the Control dialog.
5. Make sure that the imager is in reflectance by choosing
Reflectance
on the Control
dialog.
6. Look at the image in the Monitor Visible window and focus the beam on the surface of
the mirror using the Z-control on the joystick.
There are usually dust particles or scratches on the surface that you can use to focus
on.
7. Click
Aperture
on the Control dialog.
The IR Aperture dialog is displayed.
8. Enter 100 in the
Width
and
Height
text boxes.
9. Click
OK
.
The IR Aperture dialog closes and the aperture size is set.
10. In the Stage Control window, display the Scan menu and select
Monitor
.
The Monitor Visible window is used to monitor the energy reaching the detector.
11. Record the level of energy measured.
12. Click
Exit
.
The Monitor Visible window returns to monitoring the visible image.
NOTE: The energy level can also be measured in diffuse reflectance mode using this
procedure, using the white reflector slide supplied with InGaAs systems.