IR viewer manual V1-V2
INFRARED VIEWERS
M an ua l
Co n t en t s
How it works
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
How it works. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
IR viewer in comparison with a CCD camera . . . . . . . . . . . . . . . . . . . . . . . 3
Visualization of infrared laser beam in “mid-air”. . . . . . . . . . . . . . . . . . . . . 3
Power Density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Spectral sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Maintenance instruction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Black spots on the screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Technical parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Photosensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Infrared viewer focus emitted or reflected light from a chosen subject into the image tube. Electron image is generated in accordance
to S-1 spectral sensitivity and incident intensity of the photocathode
material. The device is powered by pressing and maintaining a pushbutton located on the device. When powered, and internal high voltage 3V battery – based power supply generates the 16-18 kV required
to accelerate the electron image into the output phosphor screen.
The fluorescent green light output (550 nm) is observed via an adjustable eyepiece lens.
Introduction
Infrared (IR) radiation is non-visible to human eye, therefore it is very
hard to align infrared laser beam. Altechna offers IR viewer, which
helps easily observe the IR radiation, align laser beam and calibrate laser system. Near IR viewers are extremely required in each laboratory,
because users can locate stray beams reflections without eye damage
or injuries. The IR series infrared viewers are designed to view a light
of laser sources, which emit light in near infrared zone in 350-2000
nm spectral region. Viewers are used to observe indirect radiation of
IR Light emitting diodes (LED’s), diode, dye and other laser and laser
sources. We offer low cost, compact battery operated IR viewers. This
device allows viewing continuous lasers radiation as well as pulsed
lasers radiation with pulse duration from ps to μs without synchronization.
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I R viewer in co m paris o n wi t h a CC D camera
Certain models of CCD cameras can be used to observe near-infrared
radiation at wavelengths up to about 1100 nm. However, because
these cameras are designed for optimum performance in the visible
wavelength range, as a result, they exhibit mediocre performance in
the near-infrared range; image bleeding, blooming, low sensitivity
and low contrast are some of the observed characteristics.
Visualization of infrared laser beam in “mid-air”
It is a misconception that an IR viewer can be used to view infrared
laser beams in “mid-air” (1100 – 2000 nm). However, as with the beam
from a flashlight, if dust particles are in the beam path, the beam will
become partly visible. Ordinarily, IR viewers can be used to see the
projection of the infrared beam spot on a flat diffusing surface such
as a white card or metallic surface.
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P o wer D ensi t y
S p ec t ra l sensi t ivi t y
Approximately minimum power densities required to view an infrared laser beam from a distance one meter:
Model
Wavelength, nm
Power density, mW/cm2
6 - IR-1300V1,
6 - IR-1300V2
1060
0,04
6 - IR-1700V1,
6 - IR-1700V2
6 - IR-2000V1,
6 - IR-2000V2
1300
0,7
1300
0,5
1500
50
1700
150
1500
10
1700
50
1800
180
2000
2000
mA/W
101
100
10-1
10-2
350 – 2000 nm
350 – 1700 nm
350 – 1300 nm
10-3
10-4
300
600
900
1200
1500
1800
2100
λ, nm
Figure 1. Typical spectral sensitivity for IR viewers.
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O p erat i o n
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CAUTION! Do not use the device for direct laser beam viewing. Longterm over-light may cause decrease of resolution or irreversible reduction of photocathode response and satiation of screen. .
1. Unscrew a lid (1) of the battery compartment and install one AAA
size battery into battery compartment, observing the polarity. Use
AC/DC 110-220V/3V adapter (is not delivered) and a socket (2) for
long operation.
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1
4
6
9
5
2. Screw a handle (7) into the tripod thread ¼ inches (8) of the IR
viewer.
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7
3. Unscrew a lid (9). To switch on the unit, press button (3).
Note: after switching off, the device continues to work some minutes
due to the reserved energy.
4. By focusing objective (4) and eyepiece (5) in turn, try to achieve a
bright image of the object under observation.
5. When observations are made in the near infrared region, use cutoff filter (6) with transmission from 700 nm and further. When visualizing is reflected radiation, use a metallic surface for a reflective
one, as any paper will absorb heavily.
Figure 2. IR viewer scheme.
M ain t enance ins t r u c t i o n
1. During the IR viewer operation there is no danger of electric shock.
2. When brought into a warm room from the cold outside the optical
elements may become wet.
3. Prevent the viewer from mechanical damage and moisture.
4. Protect the lenses from dirt. If necessary, clean them with clean soft
cloth; remove oiled spots or deposit with cotton wool slightly wetted
in rectified alcohol or with alcohol-ether mixture.
5. If necessary, unscrew the lens and clean the photocathode, because the dust can be viewed through hole of cover of the lens.
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B l ac k s p ot s o n t he screen
Black spots on the screen are cosmetic blemishes in the image converter which do not affect the performance or reliability of an infrared
viewers and some number of varying size are inherent in the manufacturing processes.
Technica l parame t ers
Model
6-IR1300V1
Spectral sensitivity
Resolution (center)
6-IR1700V1
6-IR200V1
Model
6-IR1300V2
6-IR1700V2
350-1300 nm 350 - 1700 nm 350-2000 nm
Spectral sensitivity
350-1300 nm 350 - 1700 nm 350-2000 nm
60 lp/mm
Resolution (center)
60 lp/mm
Field of view
40 degrees
Field of view
20 degrees
Magnification
1X
Magnification
2X
Objective lens:
F1.4/26 mm without iris
Objective lens:
F2/50 mm with iris
Focus
0.15 m to inf.
Focus
0.15 m to inf.
Battery
1.5 V «AAA» type
Battery
1.5 V «AAA» type
Battery life
(continuous)
35 hours
Input voltage from
external power
supply
Weight
DC 3 V, 20 mA max.
0.38 kg
Dimensions
155x78x55 mm
Temperature range
-10°C...+40 °C
Battery life
(continuous)
Input voltage from
external power
supply
Weight
Dimensions
Temperature range
6-IR200V2
35 hours
DC 3 V, 20 mA max.
0.42 kg
220x78x55 mm
-10°C...+40 °C
Lenses 1X (F1.4/26mm) and 2X (F2/50mm) are exchangeable.
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Standard kit for version 1 includes: IR viewer, lens 1X, IR filter, handle,
battery and case.
Approximately minimum power densities required for viewing an infrared laser beam from a distance one meter:
Standard kit for version 2 includes: IR viewer, lens 2X, distance ring,
IR filter, handle, battery and case.
• 20 μW/cm*cm for a 1060 nm
• 500 μW/cm*cm for a 1300 nm
Accessories available upon request:
The IR viewer with sensitivity 350-2000 nm has the photocathode
S-1+ type which contain the increased concentration of oxygen. It
increases sensitivity of the photocathode and shifts it in infrared area.
The IR viewer can be used to view 2.0 μm laser beam at minimum
power density 2 W/cm2. When operated in the 1500-2000 nm range,
the IR viewer has a low spectral response, therefore observations can
be performed when the following requirements are met:
•
•
•
•
•
•
•
•
•
Face mask for hands free operation;
Infrared illuminator (800 nm wavelength);
Neutral density filters (2-5% at 1.064 nm laser wavelength);
Camera adapter;
Microscope adapter;
Iris diaphragm;
C-mount adapter ring;
Video adapter VA-1;
Distance ring to 1X lens.
• Use an IR cut-off filter or interference filter and darken the room to
reduce the external background;
• Use a metallic surface for viewing the laser infrared reflective radiation, as any paper for these purposes will absorb infrared radiation.
Ph oto sensi t ivi t y
The minimum detectable signal for a near-infrared viewer depends on:
•
•
•
•
•
•
•
Power density;
Wavelength of incident radiation (nm);
Effective aperture of the objective lens;
Distance between the spot and the viewer;
Time duration of the signal (pulsed or continuous);
Reflectivity of the diffusing surface;
Sensitivity of the human eye or device used in viewing the output
of the IR viewer.
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Warran t y
The manufacturer warrants its products against defects in materials
and workmanship for a period of twelve months from the original
date of Invoice. Any device returned for warranty service must be
judged by the manufacturer as having been used according to its
original design intents. As such, misuse, neglect, or any abnormal
use is not covered by this warranty.
The manufacturer will repair or replace such products or parts
thereof, which, upon inspection by the manufacturer, is found to
be defective in either materials or workmanship. As a condition of
the manufacturer s obligation regarding warranty work, the product
must be returned to the manufacturer with a satisfactory proof of
purchase.
This warranty is null and void if equipment has been altered, tampered with, modified, or otherwise abused, mishandled, or subjected to unauthorized repairs.
The manufacturer disclaims any other warranties, either expressed
or implied, except as expressed herein. The sole obligations of the
manufacturer are repair or replace the covered device.
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UAB Altechna
Mokslininkų st. 6A, 08412 Vilnius, Lithuania
Tel. +370 5 2725738 • Fax +370 5 2723704
E-mail: [email protected]
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