N-BK7 Product Introduction:

* Because of environmental protection requirements, BK7 as borosilicate glass has been discontinued, and the new alternative product is N-BK7.

N-BK7 is designed and produced by Schott, Germany, is widely used in a variety of visible light and short-wave infrared applications, compared to other similar glass, its advantages are mainly reflected in the following aspects:

High performance, low cost
Good consistency of materials
High uniformity of refractive index
Low stress birefringence
Less bubbles and stripes
-These aspects reflect the comparative advantage of German manufacturing

The Qualities of N-BK7

Optical materials is reflected in their uniformity. More specifically, the refractive index of the entire glass is extremely narrow. Therefore, optical glasses for high-power lasers and astronomical applications in particular require extremely high homogeneity.

N-BK7 can withstand lower transition temperatures, mostly below 550°C, which can increase mold life and shorten molding time.
There will be a low tendency for chemical reactions with mold materials within the molding temperature range.
Has strict optical tolerances.
Various glass sizes available.
A variety of supply forms, including optical raw materials, optical blanks, optical parts, etc.N-BK7

High-energy laser technology, measurement technology
Semiconductor industry
Satellite technology, imaging applications in astronomical applications
Absolute refractive index deviation is small: H5 glass has a peak-to-valley value of 1 x 10-6
The imaging resolution of this quality grade glass is extremely high
The product provides a separate test report
Uniformity is measured using an advanced and extremely accurate interferometer