Product type: Thin Film Filter. Application: Lighting, Medical, Optical, Photography, Astronomy.
Overview
Dia20xt2mm Fused Silica Coated Optical Filter: an optical filter made from Glass. Listed geometry: diameter 20+0/-0.2mm, thickness 2.0+/-0.37mm, round shape. 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 | Glass |
|---|---|
| Type | Thin Film Filter |
| Shape | Round |
| Diameter | 20+0/-0.2mm |
| Thickness | 2.0+/-0.37mm |
| Parallelism | <5arcmin |
| Clear aperture | >90% |
| Usage | Lighting, Medical, Optical, Photography, Astronomy |
| Thickness Range | 2mm-5mm |
| Color | Blue |
| Principle | Selective Absorption Filter |
| Angle of incidence | 45° |
| Materials we already use | optical glass, materials, and even some plastics. |
| R1 | infinity |
| R2 | infinity |
| Chamfer | <0.25mmx45deg |
| Standard | MIL-PRF-13830B |
| Applications | . fluorescence microscopy |
| Supplier | CPG OPTICS LIMITED |
Technical data
| Items | Description | |
| Fused Silica filter | Material: | UVFS(JGS1) |
| Diameter: | 20+0/-0.2mm | |
| Thickness: | 2.0+/-0.37mm | |
| R1: | infinity | |
| R2: | infinity | |
| Surface quality: | S1&S2:60-40 | |
| Parallelism: | <5arcmin | |
| Clear aperture: | >90% | |
| Chamfer: | <0.25mmx45deg | |
| Standard: | MIL-PRF-13830B |
What to specify when you request a quote
- Spectral target — state the centre or edge wavelength, the bandwidth and the minimum transmission in the passband.
- Blocking — give the blocking range and optical density (OD) the system needs.
- Angle of incidence — listed as “45°”; interference filters shift with angle, so specify the operating angle and cone.
- Size and thickness — listed as “20+0/-0.2mm”; give outline, thickness and tolerance, and whether the filter is mounted.
- Substrate — listed as “Glass”; name the substrate glass if thermal or UV behaviour matters.
- Surface quality — quote scratch-dig for imaging paths.
Engineering guides for this part
For material grades and coating options, see Color Filter Glass Materials for High-Performance Optical Screening and Imaging. How parts like this are machined and finished is covered in Precision CNC Machining of Quartz & Fused Silica Components. 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 Optical Glass Colour Filter.
