Energy Sensor Heads0 pages

Energy Sensor Heads
with black absorption coating

Pyroelectric sensors can be classified as thermal
detectors. They permit independent of the wavelength of the incidence radiation, the direct transformation of the radiation energy pulse into a voltage
pulse. The detectors are strictly built on a coaxial
basis and are therefore extremely insensitive to interference from electromagnetic radiation (pulsed
gas laser).

0,20

10 mV / DIV

0,15

0,10

0,05

The detectors are coated with a black absorption
layer which possesses an almost constant absorption in the wavelength range from 185 nm to 25 µm.
A particular advantage is the comparatively high
sensitivity of these detectors enable a laser pulse
measurements in the µJ range.
The maximum pulse repetition rate depends on the
internal capacitance of the detector as well as on
the load resistor. All detectors can be directly connected using the BNC socket to the 1 MΩ-Input of
an oscilloscope. A lower load resistor can be used
to obtain higher pulse repetition rate. Repetition
rates of up to 100 Hz are then possible. A load resistor of 100 KΩ is part of the set. The corresponding sensitivity of the sensors for both resistors is
specified.

0,00

output for two different load resistors

0,35

-0,05

0,30
-0,8

-0,6

-0,4

-0,2

50 ms / DIV
typical output of a pyroelectric detector

0,0

0,2

Corresponding to the range of possible applications
detectors with diameters from 4 to 45 mm are available to purchase. We advise to choose a detector
with an area slightly larger than the beam cross section.

0,25

10 mV / DIV

-1,0

100 kOhm
1 MOhm

0,20

0,15

0,10

0,05

0,00

-0,05
-0,05

-0,04

-0,03

-0,02

-0,01

0,00

5 ms / DIV

Scitec Instruments Ltd · Bartles Industrial Estate · North Street · Redruth · TR15 1HR · United Kingdom
Tel: +44 (0)1209 314 608 · Fax: +44 (0)1209 314 609 · www.scitec.uk.com · scitec@scitec.uk.com

0,01