Ophir Optronics Ltd QSR User Manual
Chapter 4 – Measuring with the
Thermopile Head
Thermopile Head
This chapter provides an overview of thermopile heads and instructions for
taking measurements with the thermopile head. Topics include:
taking measurements with the thermopile head. Topics include:
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Overview of Thermopile Heads
Ophir thermopile heads measure both power and single shot energy. When a
radiant heat source, such as a laser, is directed at the absorber head aperture, a
temperature gradient is created across the thermopile of the enclosed detector
disc. This generates a voltage proportional to the incident power.
radiant heat source, such as a laser, is directed at the absorber head aperture, a
temperature gradient is created across the thermopile of the enclosed detector
disc. This generates a voltage proportional to the incident power.
The instrument amplifies this signal and indicates the power level received by
the head. At the same time, the signal-processing software enables the instrument
to respond faster than the thermal rise time of the detector disc, reducing the
response time of instrument. The energy of a single pulse is measured by
digitally integrating the pulse power over time.
the head. At the same time, the signal-processing software enables the instrument
to respond faster than the thermal rise time of the detector disc, reducing the
response time of instrument. The energy of a single pulse is measured by
digitally integrating the pulse power over time.
For a more detailed description of the principles of operation of Ophir thermopile
heads, refer to the Ophir Optronics catalog, available for download from
http://www.ophiropt.com.
heads, refer to the Ophir Optronics catalog, available for download from
http://www.ophiropt.com.
Measurement Settings Configuration
If you are planning to repeat similar measurements, you can configure the
settings for each individual head, and save them to the instrument. The saved
settings become the default configuration for that channel, and are displayed
every time the channel is opened.
settings for each individual head, and save them to the instrument. The saved
settings become the default configuration for that channel, and are displayed
every time the channel is opened.
The following sections describe how to select the measurement mode, how to
configure measurement settings for thermopile heads and how to save them as
the default configuration for that channel. The measurement setting fields differ
for power and energy modes.
configure measurement settings for thermopile heads and how to save them as
the default configuration for that channel. The measurement setting fields differ
for power and energy modes.
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