IR Windows-Infrared Windows Assemblies for Thermal Imaging Inspection

Inspection is necessary for high power and high voltage electric installations to avoid the possible accident, the thermal imagine is found to be the optimal and effective way for this application. In some countries, thermal imagine inspections is compulsory for accident insurance. And in some industrial equipment likethe high temperature metallurgic oven, it is necessary to use the thermal imagine to watch its temperature inside. An infrared windows assembly is needed to be installed on the housing of the electric and industrial equipment as the viewport windows for thermal image camera.


High power and high voltage electric installations, switch cabinet;
High temperature metallurgic oven;
Mineral and petroleum industry.

Design and standard
The windows assembly consists of metal flange, crystals windows and metal protective cover;
The protective cover is fixed by two small magnet nubs;
The whole windows is fixed on the cabinet house by the flange, no screw is needed;
Various types of infrared crystals is available: CaF2; BaF2; Germanium; Sapphire; Silicon; ZnS; ZnSe;
Confirm to the dust tight standard IP67 of NF EN6052.

Materials Used 
Flange Metal
Housing or Cover Metal Materials
Optics CaF2, BaF2, Ge, Sapphire, silicon, ZnSe, ZnS windows
Cover fixing Fixed by Magnet nub
Water and dust ingress IP67 of NF EN60529
Typical Dimensions 
Models Body Diameter Crystals Diameter Viewing Diameter Assembly Thickness
SHIRW-60 84 mm 60mm 55mm 22mm
SHIRW-75 99 mm 75mm 70mm 22mm
SHIRW-100 124 mm 100mm 95mm 22mm

Application notes
Installation steps
Step 1: Calculate and decide the position where the windows would be installed according to the view angle of the thermal imagine camera;
Step 2: Drill a hole according to the size of the windows assemblies;
Step 3: Install the whole windows assemblies;
Step 4: Open the protective cover and make the testing of the inspection.
Select the suitable crystals materials for your applications:
Several factors you should take into consideration during the selection of crystals materials: Wavelength range, environment (temperature, humidity and vibration ect.) and cost. Here is the specification of the materials for your reference.


Hangzhou Shalom EO (or Hangzhou Shalom Electro-optics Technology Co., Ltd.)

Hangzhou Shalom EO (or Hangzhou Shalom Electro-optics Technology Co., Ltd.) is a supplier of crystals, optics and components used in lasers, thermal imaging and scintillation applications since 2010. Most products are custom-made for your special needs.

The products are widely used in the laser systems and instruments, thermal imaging cameras and applications, X-ray equipment, nuclear ray detecting instruments, medical and biological equipment, automation and precision instruments in field of industry, military, scientific research and aerospace.
Hangzhou Shalom scintillation crystals
Here are the products of Shalom EO:
Laser components
Laser crystals (Nd: YAG, Nd: YVO4, Er: YAG, Cr: YAG, CTH: YAG, diffusion bonding crystals, Ti: Sapphire, etc.); Laser optics; Pockels cells and crystals; passive Q-switched crystals; Laser polarizers and wave plates.

Thermal imaging optics
IR lenses for uncooled and cooled thermal imaging cameras, IR windows (Ge, Si, ZnSe, ZnS, CaF2, BaF2), IR optics;
Hangzhou Shalom thermal imaging
Scintillation crystals (NaI Tl, CsI Tl, LYSO Ce, BGO, Ce: YAG, CdWO4, LaBr3 Ce, CeBr3, LaCl3 Ce, etc.), plastic scintillators, Tl) scintillators, NaI (Tl) detectors and NaI (Tl) probes.

Optics, wafers and crystals
Sapphire optics, SAW wafers and crystals, optical grade LiNbO3, LiTaO3, crystalline substrates, optics, filters, filters / waveguides for IPL equipment.

Crystal Optical Research

The study of the propagation of light, and associated phenomena, in crystalline solids. For a simple cubic crystal the atomicarrangement is such that in each direction through the crystal the crystal presents the same optical appearance. The atomsin anisotropic crystals are closer together in some planes through the material than in others. In anisotropic crystals theoptical characteristics are different in different directions. In classical physics the progress of an electromagnetic wavethrough a material involves the periodic displacement of electrons. In anisotropic substances the forces resisting thesedisplacements depend on the displacement direction. Thus the velocity of a light wave is different in different directions andfor different states of polarization. The absorption of the wave may also be different in different directions. See Dichroism, Trichroism

In an isotropic medium the light from a point source spreads out in a spherical shell. The light from a point source embeddedin an anisotropic crystal spreads out in two wave surfaces, one of which travels at a faster rate than the other. Thepolarization of the light varies from point to point over each wave surface, and in any particular direction from the source thepolarization of the two surfaces is opposite. The characteristics of these surfaces can be determined experimentally bymaking measurements on a given crystal.

In the most general case of a transparent anisotropic medium, the dielectric constant is different along each of threeorthogonal axes. This means that when the light vector is oriented along each direction, the velocity of light is different. Onemethod for calculating the behavior of a transparent anisotropic material is through the use of the index ellipsoid, also calledthe reciprocal ellipsoid, optical indicatrix, or ellipsoid of wave normals. This is the surface obtained by plotting the value ofthe refractive index in each principal direction for a linearly polarized light vector lying in that direction (see illustration). Thedifferent indices of refraction, or wave velocities associated with a given propagation direction, are then given by sectionsthrough the origin of the coordinates in which the index ellipsoid is drawn. These sections are ellipses, and the major andminor axes of the ellipse represent the fast and slow axes for light proceeding along the normal to the plane of the ellipse.The length of the axes represents the refractive indices for the fast and slow wave, respectively. The most asymmetric typeof ellipsoid has three unequal axes. It is a general rule in crystallography that no property of a crystal will have lesssymmetry than the class in which the crystal belongs.

Optics,Wafers and Crystals