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STV-IR or
STV-UV beam viewer is a high-efficiency ceramic disk with high
sensitivity to either coherent (laser beam) or non-coherent (LED)
radiation. It provides a simple, inexpensive and convenient method of
visualizing beam size, shape and cross-sectional intensity distribution.
It is an absolutely essential beam detection tool during laser
alignment, spot size calibration or mode structure analysis in both lab
and field environment.
STV-Disks
provides unlimited, continuous viewing of both pulsed and CW laser and
light sources. They require no re-charging, have no fading, saturation
or after-glow, don�t have to be constantly moved around as conventional
IR cards and allow real-time monitoring of beam shape and transverse
mode structure.
Their
operational principle is based on either up or down-converted
transitions in the unique powder mixture of ions of rare-earth metals.
As a result IR radiation can be observed as a green light, and UV
radiation appears as red or deep red colour.
Image of
1W/1470 nm laser diode beam transmitted through cylindrical lens.
TYPICAL
APPLICATIONS:
IR - Laser
Diodes (808, 880, 915, 940, 980, 1450, 1470, 1550 nm); Nd:Glass, Nd:YAG,
Nd:YLF, Nd:YVO4, Er:Glass lasers (1047-1064, 1540 nm).
UV -
Excimer lasers, gas lasers, and frequency tripled Nd:YAG, doubled
alexandrite, etc. various light-emitting diodes
TECHNICAL SPECIFICATIONS:
|
|
IR |
UV |
|
Stimulation Spectral Range |
800-1700 nm |
190-390 nm |
|
Emission Colour |
Green - 520...550 nm |
Red
- 645...675 nm |
|
Duration of After-Glow (radiation source removed) |
<10
msec |
<10
msec |
|
Spatial resolution
|
>
20 grooves/mm, features of < 50 μm in size can be resolved. |
>
20 grooves/mm, features of < 50 μm in size can be resolved. |
|
Sensitivity Threshold
|
10
μJ/cm2 (pulsed) and 100 μW/cm2 (CW) |
10
μJ/cm2 (pulsed) and 100 μW/cm2 (CW) |
|
Surface Damage Threshold
|
-
From ~1 J/cm2 for nsec pulses to 10 J/cm2 for μsec and msec
pulses;
-
100 W/cm2 for intermittent CW operation;
-
Using V-Disks with high fluence laser beams requires their
expansion or attenuation.
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Do not place V-Disks at or near focal plane of the laser beam. |
Notice:
Always wear protective safety goggles when operating live laser
equipment!
A
proprietary technology is used to make STV-Disks as solid structures of
various shapes and sizes (either round or rectangular). Standard
dimensions are 40mm Dia. x 5 mm Thk., 25 mm Dia. x 5 mm Thk., 50 x 50 x
5 mm Thk. Custom sizes are available on request and carry minimal
quantity requirements. Disks can be used as a free-standing screen or as
a handheld wand for the applications that require access to the beam.
STV-Disks
are long-lasting and require no maintenance: if the active surface
becomes damaged it can be easily refinished with fine sandpaper.
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