Application: Electronics & Instruments. Model: Optical Glass.
Overview
High Precision Optical Glass Bk7/K9 Fused Silica for Lens Window is an optical lens made from Quartz Glass. Listed geometry: diameter +/-0.1, size Customized, flat/curve shape. Flatness High Class. Typical applications: Fireplace Oven Glass and Laboratory Instruments. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Material | Quartz Glass |
|---|---|
| Shape | Flat/Curve |
| Size | Customized |
| Flatness | High Class |
| Application | Fireplace Oven Glass, Laboratory Instruments, etc |
| Usage | Electronics & Instruments |
| Model NO. | Optical Glass |
| Appearance | Bent Tempered/Flat Tempered |
| Standard | GB15763.2-2005 |
| Steel Degree | Tempered Glass |
| Thickness of Flat Tempered Glass | 1mm-50mm |
| Thickness of Curve Tempered Glass | 1mm-50mm |
| Fragment State | Ⅲ |
| Technics | Physically Tempered |
| Edges Treatment | Safe/Smooth Edge |
| Diameter Tolerance | +/-0.1 |
| Strain Point | 893 Celsuis Degrees |
| Softening Point (Estimated) | 1585 Celsuis Degrees |
| Annealing Point | 1042 Celsuis Degrees |
| Circular | Diameter 1mm – Diameter 500mm |
| Square/Rectangle | 1 * 1mm-800 * 800mm |
| Visible Light | ≥90%,≥92%,≥95%,≥98% |
| Ra | ≤0.5nm,≤1nm |
| Supplier | Shanghai Wuyong Glass Co., Ltd. |
Technical data
| Basic Size Specifications | |
|---|---|
| Shape | Circular/Square/Rectangular/Irregular Shapes |
| Size Range | Circular: Diameter 1mm – Diameter 500mmSquare/Rectangle: 1 * 1mm-800 * 800mm |
| Thickness | 0.1mm-50mm |
| Dimensional Tolerance | +-0.1mm |
| Thickness Tolerance | +-0.05mm-0.1mm |
| Material Model | N-BK7/H-K9L |
| Performance Parameters | |
|---|---|
| Refractive Index | 1.46-1.9 |
| Transmittance | Visible Light: ≥90%,≥92%,≥95%,≥98% |
| Ultraviolet UV | 200nm-400nm High Transparency |
| Infrared IR | 800nm-3000nm High Transparency |
| Wavelength Range | 200nm-5000nm |
| Surface Finish | 40/20,20/10,10/5(MIL-O-13830A) |
| Polishing Precision | Double Sided Polishing/Single-Sided Polishing |
| Surface Roughness | Ra:≤0.5nm,≤1nm |
| Angle | Customized |
What to specify when you request a quote
- Material — listed as “Quartz Glass”; name the glass or crystal.
- Geometry — listed as “Customized”; give diameter, focal length or radii, angles and tolerances.
- Surface figure — listed as “High Class”; quote surface figure (λ) and scratch-dig.
- Centring and edges — listed as “Safe/Smooth Edge”; state centration and edge chamfer.
- Coating — list the band and reflectance or transmission target.
Engineering guides for this part
For material grades and coating options, see Selecting Fused Silica and Quartz Glass for Precision Components. How parts like this are machined and finished is covered in Optical Glass Polishing for High Clarity Surfaces. For an application example, read Boost Yield with Fused Silica Viewports for Vacuum and Optical Systems. Before sending a drawing, check Quartz Glass Manufacturing: Controlling Thermal Conductivity in Fused Silica. A related standard product is Fused Silica Glass Wafers (2–12", JGS1/JGS2).
