Product type: Glass Dome. Application: Lighting, Medical, Optical, Photography, Astronomy.
Overview
Dia124xct7mm N-Bk7 Optical Glass Dome Lens: an optical lens made from Optical Glass. Listed geometry: diameter 124.0+0.0/-0.1mm, dome shape. Optical / electrical data: transmittance 90%-95%. Coating: HMC; surface quality 80-50; flatness 20fr,PWR;5fr,IRR. Typical applications: Lighting, Medical, Optical, Photography and Astronomy. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Material | Optical Glass |
|---|---|
| Type | Glass Dome |
| Shape | Dome |
| Diameter | 124.0+0.0/-0.1mm |
| Transmittance | 90%-95% |
| Coating | HMC |
| Surface quality | 80-50 |
| Flatness | 20fr,PWR;5fr,IRR |
| Clear Aperture | >90% |
| Usage | Lighting, Medical, Optical, Photography, Astronomy |
| Lenses Color | Clear |
| Specifications | Items |
| Center thickness | 7.0+0.0/-0.2mm |
| ROC1 | 84.69mm CX |
| ROC2 | 77.69mm CC |
| Chamfer | <0.2mmx45deg |
| Standard | MIL-PRF-13830B |
| Supplier | CPG OPTICS LIMITED |
Technical data
| Items | Description | |
| Glass Dome | Material: | Schott N-BK7 |
| Diameter: | 124.0+0.0/-0.1mm | |
| Center thickness: | 7.0+0.0/-0.2mm | |
| ROC1: | 84.69mm CX | |
| ROC2: | 77.69mm CC | |
| Flatness: | 20fr,PWR;5fr,IRR | |
| Surface quality: | 80-50 | |
| Centerness: | N/A | |
| Clear Aperture: | >90% | |
| Chamfer: | <0.2mmx45deg | |
| Coating: | uncoated | |
| Standard: | MIL-PRF-13830B |
What to specify when you request a quote
- Material — listed as “Optical Glass”; name the glass or crystal.
- Geometry — listed as “124.0+0.0/-0.1mm”; give diameter, focal length or radii, angles and tolerances.
- Surface figure — listed as “80-50”; quote surface figure (λ) and scratch-dig.
- Centring and edges — listed as “<0.2mmx45deg”; state centration and edge chamfer.
- Coating — listed as “HMC”; list the band and reflectance or transmission target.
Engineering guides for this part
For material grades and coating options, see Fused Silica Wafer Material Selection for Precision Glass Processing. 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 Fused Silica Refractive Index: Key to Optical Design Improvement. A related standard product is Fused Silica Glass Wafers (2–12", JGS1/JGS2).
