MKS Newport IRV3 Series User manual

INFRARED VIEWERS
IRV3 SERIES
User Manual

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Table of Contents
1Warranty ...............................................................................................................................................3
1..1 Sales, Service and Technical Support Center.....................................................................3
2Safety Information ................................................................................................................................4
3About ....................................................................................................................................................4
4How it works .........................................................................................................................................5
5Applications ..........................................................................................................................................5
6Operation..............................................................................................................................................6
7Visualization .........................................................................................................................................8
7..1 Photosensitivity ....................................................................................................................8
7..2 Black Spots on Screen.........................................................................................................8
7..3 Visualization of Beam in Mid-Air ..........................................................................................8
7..4 Spectral Sensitivity...............................................................................................................9
7..5 Power Density......................................................................................................................9
7..6 Technical Parameters ........................................................................................................10
8Maintenance Instructions ...................................................................................................................10

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1 Warranty
Our IR Viewers are guaranteed for a period of 12 months after the date of shipment. There is no limit to
the operational hours during this time. The only exception to this warranty is obvious misuse. Before
returning your instrument for warranty or normal service, contact a customer service representative for
a return authorization number as specified in Section 1.1.
We will provide you with a convenient shipping address at that time. In the case of non-warranty
service, a quote will be provided for the cost of repair (after receipt and inspection) for your approval
before any work is done.
1..1 Sales, Service and Technical Support Center
UNITED STATES
Newport Corporation
1791 Deere Avenue
Irvine, California, 92606 USA
Attention: Customer Service
Phone [phone]
www.newport.com/contact-us
Please visit: https://www.newport.com/contact/contactslocations for International Distributors and
Representatives

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2 Safety Information
The customer is responsible for light source safety while using a viewer as a standalone device or
integrated into system.
The customer must consider protective measures if necessary.
While assembling or operating viewer, do not stare at the direct laser (or other source) light even with
safety goggles.
This device will not protect you from direct or high light radiation. Use viewer with caution and
appropriate attenuation.
Electrical safety requirements must be complied while operating this device.
CAUTION! Do not use the device for direct beam viewing. Long-term over-exposure may cause
satiation of screen and decrease of resolution or irreversible reduction of photocathode response.
Use your computer or phone charger with USB cable to charge the device. Do not charge the device
with a charger which is more powerful than 5V DC 500mA.
3 About
High performance image conversion viewers VIR, based on high - grade image converter, are
designed to observe indirect radiation of infrared laser, light-emitting diodes (LED), dye, and other IR
sources in 350 - 2000 nm spectral region. The lightweight, compact device can be used hand-held, or
post-mounted with the 1/4-20 internal thread.
VIR viewer has better resolution, infrared sensitivity, and factor of intensification. Also, it can be used
with a CCD camera adapter for PC and video registration of the image.
This device allows viewing continuous laser radiation as well as pulsed laser radiation with pulse
duration from ps to µs without synchronization.

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4 How it works
The IR viewer design is based on a
first-generation high-grade image
converter that has an electro-static
focusing system, photocathode S-1+
with increased concentration of
oxygen and screen of type P-20 with
maximum of luminescence at 550nm.
Infrared viewer focus emitted or
reflected light from a chosen subject
into the image tube where electron
image is generated. When powered
(with battery or power supply) the 16-
18 kV voltage is generated 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.
5 Applications
•Laser alignment and safety – IR viewers are ideal for alignment of infrared laser beam
and optical components in near infrared systems
•Semiconductors wafer inspection – With a microscope adapter IR viewer can be used to
view through the surface of silicon and gallium arsenide wafers
•Forensics and art restoration
•Photo processing
•Thermal imaging
•Food sorting
•Vein and blood vessel observation under the skin
•Fluid inspection
Figure 1: How it works

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6 Operation
CAUTION! Do not use the device for direct beam viewing. Long-term over-exposure may cause
satiation of screen and decrease of resolution or irreversible reduction of photocathode
response.
Use your computer or phone charger with USB cable to charge the device. Do not charge the
device with a charger which is more powerful than 5V DC 500mA.
•To charge the device use USB outlet at the bottom of the handle.
•Screw the handle (6) into the tripod thread ¼ inches (8) in body.
•Take of the lens cover. To switch the unit on, press button (2). NOTE: after switching off,
the device continues to work some minutes due to the accumulated power.
•Rotate the ring (3) to focus the lens 1X (F1.4/25mm). Rotate ring (3) to focus the lens 2X
(F1.8/50mm). For adjustment of diaphragm (9), release the screw, adjust the diaphragm
(9) and tighten the screw. Turn the ring (5) for eyepiece focus adjustment.
•When viewing in the near-infrared range, use a cut-off filter (4). While viewing a reflected
radiation, use a metallic surface as a reflector. Any paper surface absorbs the radiation
greatly.

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Figure 2: IRV3 1X Viewer
Figure 3: Lenses 1X (left) and 2X (right)

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7 Visualization
7..1 Photosensitivity
The minimum detectable signal for a near-infrared viewer depends on:
• Power density
• Wavelength of incident radiation
• Effective aperture of the objective lens
• Distance between observed target and the viewer
• Time duration of the signal (pulsed or continuous)
• Reflectivity of the diffusing surface
• Sensitivity of human eye or device used in viewing the output of the IR viewer
Approximate minimum of power densities required for observing an infrared laser source from a
distance of one meter:
20 µW/cm2 for a 1060 nm; 500 µW/cm2 for a 1300 nm. 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. 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, IR viewer has a
low spectral response, therefore observations can be performed when the following
requirements are met:
1. Use an IR cut-off filter or interference filter and darken the room to reduce the external
background.
2. Use a metallic surface for observation of reflected radiation, as any other material
might absorb infrared radiation.
7..2 Black Spots on Screen
Black spots on the screen are cosmetic blemishes in the image converter which do not affect the
performance or reliability of infrared viewers. Some spots are inherent in the manufacturing processes.
7..3 Visualization of 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, if dust particles are in the beam path, the beam will become partly visible.
Basically, 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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7..4 Spectral Sensitivity
7..5 Power Density
Approximate minimum of power densities required for observing an infrared laser source from a
distance of one meter: 20 µW/cm2 for a 1060 nm; 500 µW/cm2 for a 1300 nm.
Figure 4: Spectral Sensitivity
Figure 5: Power Density

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7..6 Technical Parameters
Lens
1 (1X)
2 (2X)
Spectral sensitivity
(350-1300nm) IRV3-1300
(350-1700nm) IRV3-1700
(350-2000nm) IRV3-2000
Resolution (center)
60 Lp/mm
60 Lp/mm
Field of view
40°
20°
Magnification
1X
2X
Objective lens
F1.4/26mm
F1.8/50mm
Adjustable iris
Included
Included
Focus
0.15m (0.05m)* to inf
0.5m (0.15m)* to inf
Working distance of lens
12.5 (+/0.2) mm
12.5 (+/0.2) mm
Non-uniformity of screen
<20%
Non-uniformity of
response
<15%
Distortion of image
<50%
Battery life (continuous)
50 hours
Weight
0.42kg
Dimensions
145x78x52 mm
Temperature range
-10°C...40°C
Tripod or handle
connection
R”1/4”
* with distance ring
8 Maintenance Instructions
1. Keep away viewer from mechanical damage and moisture.
2. 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 an alcohol-ether mixture.
3. If necessary, unscrew the lens and clean the photocathode window because dust can be seen
through the eyepiece.
4. If the viewer is not used, please keep the objective closed due to photo cathode exposure to
light and possible degradation of IR-sensitive material.