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Vector Pyroelectric Detectors
Vector Pyroelectric Detectors, as with all Scientech detectors, have
our traditional quality built in and offer futuristic features and performance.
A variety of detectors are available including the unique high damage threshold
HD and HDX models which can withstand energy densities up to 1.4 J/cm2
and 12 J/cm2 respectively. High resolution HR detectors can measure repetition
rates up to 4 kHz and resolve energy readings to 3 nJ.
The heart of the pyroelectric joulemeter, a sensitive detector of pulsed
radiation, is the pyroelectric element. This element contains a temperature
sensitive crystal which exhibits spontaneous electric polarization when
exposed to the sensible heat generated by absorbed modulated radiation.
The polarization is measured as a voltage at the electrodes which are attached
to the crystal. This voltage is proportional to the laser energy level
being absorbed. Since no power is required to drive the joulemeters, they
can be directly connected to an oscilloscope as well as a Vector Synenergy
Indicator. Futuristic Vector detectors are available with normal and slim
profiles in highly absorbing, high rep rate, and high damage threshold
models.

Click on the chart for our full specifications.

The P and SP models utilize a unique, durable, highly absorbing black
coating which yields the flattest spectral response from the UV to the
mid IR with reflection limited over the entire spectral region as indicated
in Figure 1 (above) for the specifications. The high damage HD and HDX models
are unique in pyroelectric measurement since they yield unsurpassed damage
specifications. The HF high rep rate models have an energetic, partially
absorbing, partially reflecting chromium coating. This coating is inherently
fast and detects individual pulse energies at high repetition rates. The
high resolution HR models are capable of low energy detection with noise
equivalent energy levels down to 3 nJ on the most sensitive model. To accomplish
accurate readings at such low energy levels, each HR detector contains
a preamplifier powered by a 9 volt battery. This internal battery supplies
noise-free power to the amplifying circuit. Inaccurate readings caused
by low battery conditions are immediately and clearly recognized by a low
battery warning LED light located on the top of the detector. All detectors
come with a 1.27 cm (0.5") diameter x 8.89 cm (3.5") long post
for mounting to an optical table and a BNC interconnect cable. A base (Model
301-019) for holding the detector/mounting post assembly upright is also
available.
An optimum calibration of each detector is ensured by Scientech's highly
trained and skilled service team. These experts use an electrically calibrated
Scientech calorimeter/indicator system which has been NIST certified as
the transfer standard. The energy of Scientech's YAG laser is accurately
measured by the NIST certified calorimeter system and transferred to each
Vector pyroelectric detector. This dependable calibration procedure generates
a reliable certificate of calibration which accompanies each Vector joulemeter
system and detector.
Excessive energy or peak power density can damage any Vector pyroelectric
detector. See Figure 2 (above) for safe operating limits. If your calculated specifications exceed those provided in Figure 2 and the specification table, optical attenuation is required. Scientech provides a damage test slide with each detector (except HD and HDX models) for preoperation
damage testing.
Features:
- Joulemeter single pulse energy measurements at rep rates up to 4 kHz
- Advanced EMI/RFI protection
- High damage threshold models
- Slim profile models
- Easy connection to oscilloscope
- N.I.S.T. traceable calibration
Scientech, Inc.
5649 Arapahoe Avenue,
Boulder, Colorado 80303
Phone: (303) 444-1361 1-800-525-0522
Fax: (303) 444-9229
Email: inst@scientech-inc.com
Scientech, Inc manufacturers of analytical balances, top loading balances, electronic balances, precision balances, scales, gem scales, jewelry scales, laser power meters, laser energy meters, calorimeters, pyroelectric detectors, and laser power and energy systems.
Copyright © 1996, 1997, 1998, 1999, 2000 Scientech, Inc.
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