Selecting Settings From The Vega Screen - OPHIR vega User Manual

frequency information, the Vega is also able to display
average power.
The photodiode based PD10 & PD10-PJ sensors also use
the same circuitry but can measure much lower energies
due to the sensitivity of the photodiode.
6.1.2. Photodiode energy sensors – method of operation
The PD10 & PD10-PJ operates in a similar fashion to the
pyroelectric PE sensors except it has a photodiode
detector instead of pyroelectric. Because of its great
sensitivity, it can operate down to about 1nJ of energy. It
has complete wavelength correction over its entire
measurement range of 200 - 1100nm.
The PD10 & PD10-PJ operates in a similar fashion to the
PE sensor except that it has one extra function. When
measuring very low energies, the sensor will also be
sensitive to background light and therefore show a
spuriously high reading. Therefore we have added a
function to measure the background light. When
measuring low energies, block the laser and press
"Bkgrnd".
You will see a reading of the background light. This
reading can be subtracted from your laser reading to
obtain a more accurate reading. Also, making the room
darker will reduce this background effect.

6.2 Selecting Settings from the Vega Screen

The Vega can conveniently be set to various chosen
parameters from the screen. In addition, it can be set to
startup defaults so it will be in the desired configuration
when turned on.
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