Product type: Glass Dome. Application: Lighting, Medical, Optical, Photography, Astronomy.
Overview
Dia203xCT8.3mm N-BK7 Uncoated Optical Glass Dome: a custom precision glass component made from Optical Glass. Listed geometry: diameter 203.0+0.0/-0.1mm, dome shape. Optical / electrical data: transmittance 90%-95%. Coating: HMC; surface quality 80-50; flatness 20fr,PWR;2fr,IRR. Listed for Lighting, Medical, Optical, Photography and Astronomy applications. 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 | 203.0+0.0/-0.1mm |
| Transmittance | 90%-95% |
| Coating | HMC |
| Surface quality | 80-50 |
| Flatness | 20fr,PWR;2fr,IRR |
| Clear Aperture | >90% |
| Usage | Lighting, Medical, Optical, Photography, Astronomy |
| Lenses Color | Clear |
| Specifications | Items |
| Center thickness | 8.3+0.0/-0.1mm |
| ROC1 | 109.72mm CX |
| ROC2 | 101.42mm CC |
| Chamfer | <0.2mmx45deg |
| Standard | MIL-PRF-13830B |
| Supplier | CPG OPTICS LIMITED |
Technical data
| Items | Description | |
| Glass Dome | Material: | Schott N-BK7 |
| Diameter: | 203.0+0.0/-0.1mm | |
| Center thickness: | 8.3+0.0/-0.1mm | |
| ROC1: | 109.72mm CX | |
| ROC2: | 101.42mm CC | |
| Flatness: | 20fr,PWR;2fr,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 quartz grade.
- Outline and thickness — listed as “203.0+0.0/-0.1mm”; give outline, thickness and tolerances.
- Holes, slots and features — listed as “Dome”; dimension every hole and its position tolerance on the drawing.
- Edges — listed as “<0.2mmx45deg”; state edge finish and chamfer.
- Surface — listed as “80-50”; state polish and flatness where they matter.
Engineering guides for this part
For material grades and coating options, see Custom Precision Glass: Materials & Coatings for Special Shapes. How parts like this are machined and finished is covered in CNC Glass V-Groove Machining for LED and Optical Parts. For an application example, read Why Quartz Glass Components Excel in Coffee Machine Heating Modules. Before sending a drawing, check Choosing Glass Materials for Optical & Industrial Components. A related standard product is Custom Special-Shaped Glass Plate.
