Product Announcements:
Optical Windows

Avantier manufactures custom and stock germanium windows for thermal imaging, IR laser, aerospace, and defense systems. Sizes run from 2-100 mm, with BBAR and DLC/BBAR coatings that offset germanium's high refractive index and maximize IR transmission from 2-14 µm. Precision flatness and surface quality support everything from prototypes to full production. Read more...

High-durability sapphire optical windows with excellent transmission, high surface quality, and strong environmental resistance for laser, infrared, and precision optical systems. Read more...

Step glass windows are designed with steps of varying heights at the edge of the window or at specific locations. Read more...

BK7 and K9 are two common optical glass materials, widely used in lenses, prisms, windows and other optical components. Yutai Optics chooses K9 as an alternative material to BK7. Read more...

What is the usage of sapphire windows in optics?
Sapphire is frequently used in optical windows,optical spherical lenses, and other optical components. Additionally, sapphire is often used in high-powered lasers due to its ability and durability to withstand high temperatures. If you need an optical material that can stand up to the most demanding applications. Read more...

Fused silica glass uses
Fused silica and quartz are used in the manufacture of many optical components: such as optical lenses, optical mirrors, UV and IR wavelength transmitting optics, and metrology components—due to their ability to transmit light in the VIS(400-700nm), UV (200-400nm), and IR(700-14000nm) range. Read more...

The optical properties (refractive index, Abbe number) of BK7 and K9 are almost the same, and they can replace each other in the visible wavelength. 1064nm is the working wavelength of YAG laser, and all kinds of 1064nm coated optics are needed for YAG lasers. Read more...

Steps increase mechanical strength and reduce the risk of window deformation in high pressure or vibration environments. Suitable for high mechanical stress scenarios such as aerospace and on-board optical systems. Read more...

Avantier’s BK7 windows are ideally suited for rigorous optical applications, attainable with laser-grade precision. BK7 glass boasts a density of 2.51 g/cm³ and a Knoop hardness rating of 610. Its coefficient of thermal expansion measures approximately 7.1 x 10^-6 K in the range from -30 °C to +70 °C, and about 8.3 x 10^-6/K from +20 °C to +300 °C. Read more...