Application of BK7 optical glass

Oct. 09, 2019

BK7 is the brand name of the German SCHOTT glass factory, and K9 is the corresponding domestic glass brand. N-BK7 is the glass of Germany SHOTT H-K9L is the glass of Chengdu light BSC7 is the glass of Japan HOYA.

BK7 Optical Glass

BK7 (K9) glass: BK7 is a common borosilicate glass, widely used as an optical material in the visible and near-infrared regions. It is a commonly used optical and microsystem material. With the rapid development of optical and micro-system technology, the technology of making micro- and nano-scale microstructures and micro-devices on BK7 glass has been applied to optoelectronics and microwave technology due to its low price and good micro-machining performance. Many fields such as diffractive optical elements.

BK7 has been used for lenses or prisms since long ago. Although there are BSC7 or BSL7 models, depending on the manufacturer, the composition, optical properties, physical properties, and chemical properties are basically the same. The visible spectral region has a good permeability, with few bubbles or impurities, and the unevenness of the striations and the refractive index that have an adverse effect on the optical system is also reduced to a level that hardly affects. In addition to lenses or prisms, it is also used in most optical elements such as mirrors or beam splitter substrates or various coated filter substrates. BK7 also has a high hardness and can prevent scratches. The transmission spectrum ranges from 380 to 2100 nm.


BK7 optical glass

Galvo scanner mirror

The high uniformity of BK7, low bubble and impurity content, and simple production and processing make it a good choice for making transmissive optics. It has excellent mechanical properties and very low bubbles and impurities, and has good scratch resistance.

Due to its stable chemical properties, no special treatment for grinding and polishing is required. Used in many fields such as optoelectronics, microwave technology, and diffractive optical components. However, it has a high coefficient of thermal expansion and is not suitable for use in applications where the ambient temperature is variable.

BK7 is used to make a variety of visible to near-infrared optical components such as flat mirrors, lenses, prisms, etc.

BRD is professional optical components manufacturer. We produce different kinds of BK7 optical glass, including BK7 glass optical mirror. If you would like more details, please log in to our website to contact us, we are looking forward to your contact.

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