BK-7 Optical Glass

Optimum Transmission Range:	Ideal Applications:
350 nm - 2.0 µm	Optical imaging in the visible spectrum
	Laser Optics
	Stable temperature environments

For all standard optical glass components, or when optical glass is generically requested for custom elements, Esco Products uses normal quality BK7, a high quality optical glass that is used whenever the additional benefits of fused silica are not required.  Since BK7 performs well in all chemical tests, no special handling is required, thus reducing manufacturing costs. It is a relatively hard material with extremely low bubble and inclusion content. BK7 provides excellent transmittance through-out the visible and near infrared spectra and down to 350 nm in the ultraviolet.

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  Mechanical Properties of Optical Materials
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  Striae and Homogeneity
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Optimum Transmission Range:	Ideal Applications:
270 nm - 2.5 µm	Condenser optics not concerned with scatter or distortion
	High temperature and pressure applications
	Optical flats, microscope slides, and sight glasses

G1 fused quartz/silica material is virtually bubble-free in thin, small optics.  Elements built from larger pieces will most likely contain bubbles. Your application should not be sensitive to these inclusions. G1 provides good UV and visible transmission. In cases where simple light gathering and strong mechanical properties are the primary goals, G1 grade provides excellent performance at a low price. A1 is ideal for all but the most demanding optical applications. All the materials used in this grade are guaranteed to be Grade B or better, providing excellent optical and physical properties at a reasonable price.  A1 is an ideal material for larger-sized optical components.
Top of Page   Mechanical Properties of Optical Materials
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