Product Description

The SM-3R is a miniature infrared viewer that fits comfortably in the palm of a hand or on a face-mask for hands free operation. This viewer is suitable when size and weight are more important.

How infrared viewer works?

IR viewer 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.

Typical applications

  • Laser alignment and safety
  • (IR) Infrared viewer is ideal for alignment of infrared laser beam and optical components in near infrared systems.
  • Semiconductors 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



Technical information

VersionVersion 1 (1.8X)Version 2 (3.4X)
Spectral sensitivity350–1700nm350–2000nm350–1700nm350–2000nm
Resolution(centre)50 Lp/mm50 Lp/mm
Field of view25°12°
Objective lensF1.4/26mmF1.8/50mm
Adjustable IrisAvailableIncluded
Focus0.2m (0.05m)* to inf0.6m (0.15m)* to inf
Working distance of lens12.5 (+/-0.2) mm12.5 (+/-0.2) mm
Battery2xLR44 or CR1/3N2xLR44 or CR1/3N
Non-uniformity of screen<20%<20%
Non-uniformity of response<15%<15%
Distortion of image<18%<18%
Battery life(continuous)10 hours (up to 100 hours)**10 hours (up to 100 hours)**
External power supply
Dimensions130x65x43 mm135x65x52 mm
Temperature range-10ºC…40ºС-10ºC…40ºС
Tripod or handle connectionR”1/4″R”1/4″

*with distance ring

**with AAA batteries adapter