Ophir Optronics Ltd QSR Manuel D’Utilisation

Chapter 4 – Measuring with the Thermopile Head

Configuring Measurement Settings in Power Mode

Selecting the Measurement Mode

To select the measurement mode:

1. Select Power or Energy from the Mode drop down list in the

Measurement Parameters Area. The Thermopile screen fields displayed
depend on the mode selected.

Figure 4-1 Mode Drop Down List

Configuring Measurement Settings in Power Mode

This section explains how to select the laser wavelength and configure the range
and an average reading in power mode.

Selecting the Laser Wavelength

Thermopile heads have different absorption at different wavelengths. To
compensate for these differences, each head has been calibrated by a laser at
several wavelengths. By choosing the correct laser wavelength, the correction
factor for that wavelength is automatically introduced.

To select the laser wavelength:

1. Select the laser wavelength from the Laser drop down list in the

Measurement Parameters Area.

Figure 4-2 Laser Drop Down List

LP1 Heads

For the new LP1 family of heads, the absorption of the detector coating varies
somewhat according to wavelength. The correction curve for the absorber is
stored in the head EEROM. This correction curve ensures that the power reading
is correct at all laser wavelengths.

To configure laser wavelengths, refer to Configuring Laser Wavelengths in
Chapter 5 – Measuring with the Photodiode Head

StarLab User Guide