Qwave User Manual
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file, the software calculated the spectral sensitivity of your spectrometer and shows it as a
dark green line. To save this new calibration to th
If you also want to calibrate the absolute scale of the intensity axis, you need to take a
spectrum and also need to know the absolute optical power (in Watts) of this spectrum. If
you measure the actual optical power with an optical powermeter, please make sure that
the powermeter only detects wavelengths that are within the wavelength range of your
calibration is stored in the device and used for scaling the intensity axis. This axis then
displays the spectral power density in nW/nm.
For
instance, you could calibrate the power that enters your measurement probe or any
other power in your setup, as long as it is proportional to the power that enters the
spectrometer. Just remember that the optical powers and power densities displayed by
the software refer to this value.
3.10
Triggering and I/O Port
Trigger Options
Spectra are generally taken after you click on one of the green buttons ([ ] or [ ]) in the
Exposure Toolbar. In addition, you can set the spectrometer to wait for an additional
can select one of three different trigger modes:
continuous: Spectra are taken as soon as possible.
interval: Spectra are taken in regular time intervals. You can specify the time
between two spectra and also a time period after which the measurement is
stopped. The timer progress is shown in the status bar. Obviously, this trigger
mode does not apply to single shot measurements.
external: Spectra are taken after the input voltage on one of the external I/O
channels has changed. You can use this to synchronize the exposure to other
devices or external events.
select further
trigger options. These trigger options apply to the external as well as to the internal
(continuous and interval) trigger modes.
Trigger on end of exposure: This is the default mode. The spectrometer is
continuously taking spectra and when the trigger event occurs, the current
spectrum is read out. This causes a random trigger delay between zero and the
exposure time.
Trigger on start of exposure: The spectrometer is continuously taking spectra and
when the trigger event occurs, the next spectrum after the one currently being
