H-K9L Glass Chinese Equivalent BK7 Wafers

H-K9L Glass Wafers Measuremets

A mechanical engineer requested the following quote:

We would like to purchase 20X 2 mm thick rectangular 45 mm x 22 mm pieces of H9KL glass. Please give us a quote and lead time for this.

TTV is different from Peak to Valley (PV) Flatness measurements of a Glass Surface. Do you have a spec for PV Flatness of the glass surface?

Answer:

We do not use PV value to define the flatness of such wafers, of cause we can measure this value, like as follows by our Zygo machine. So, for such such small chips(45*22mm), the PV should be less than 1λ. Click for image.

Reference #277417 for specs and pricing.

H-K9L with Laser Quality Surface Finish

A optical researcher requested the highest quality glass for their research:

All wafer substrates must be Plano/Plano with parallelism better than 1 arc min and Laser Quality.

8pcs. H-K9L 150mm diameter x 1.5mm thk.

urface Finish: 10/5 Scratch/Dig on both sides. Surface Flatness, both sides: lambda/[email protected] Thickness tolerance: +/- 0.1mm Lateral dimension tolerance: +0.0mm/-0.15mm

Reference #225209 for specs and pricing.

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H-K9L High Refractive Index and Density

When developing optics that are used in extreme environments, it is important to recognize that the optical glass will have a high refractive index and high density of glass, such as the H-K9L. With a lens with this diameter, the densities of the glass become crucial for weight-sensitive applications and help determine the weight of an optical assembly. [Sources: 0]

H-K9L is an excellent less expensive alternative BK7 glass.

H-K9L is a great subsitute for fused silica when extremely hard glass is not required. H-K9L benefits includes:

• low refractive index
• low dispersion
• excellent transmittance through-out the visible and near infrared spectra

Please let us know what specs we can quote for you!

In applications with extreme temperatures and rapid temperature differences, the expansion coefficient of the glass becomes a key factor. The requirements of optical systems for different applications are covered by so many factors that they cannot be met with just a small number of types of glass. Edmund Optics (r) offers a list of eyewear types that can be selected based on the following properties. [Sources: 0] Spherical aberrations are less present because light travels faster in materials with a lower refractive index. High-index refractions bend light so there is less need for curvature of the lens. [Sources: 0] Geometric and colored induced aberrations can be compensated by using a wide-angle lens with a high refractive index, such as the H-K9L. [Sources: 0] Designers typically use the refractive index (Abbe number) of the glass as a degree of freedom when designing systems. The refractive index is a measure of how light interacts with the specified material and slows down when it passes through the optical material. [Sources: 0] This is determined by the Abbe number (v / d), which is defined as where F / C d is. + 1 (F - C). The x-axis is in the opposite direction, with the number on the left increasing (the number of increases). Fig. 50, and the line starts from bottom to top (starting with number 55) and continues from top to top (Fig. 1). [Sources: 0] Many glass manufacturers offer the same material properties under different trade names, but most modify the products and processes to be ECO-friendly (lead and arsenic-free), and most of them are "ECO-friendly" or "lead-free" (arsenic-free). The lead letters in the glass names indicate the important chemical elements used in each type of glass. There are large lines that separate different types of glass, such as lead, arsenic, lead - free and free - lead. The deviation is due to the different chemical composition of the different types of glass and their chemical properties. [Sources: 0] The Abbe diagram, first introduced by SCHOTT in 1923, is a long-established survey of the refractive index of optical glass (d). It indicates the difference between the optical properties of different types of glass in terms of their refractory properties. [Sources: 0]

Zygo Results of H-K9L Glass