Product type: Optical Shortpass Filter. Application: Lighting, Medical, Optical, Photography, Astronomy.
Overview
The 38X31X5.9mm (RG850) 905nm Coated Optical Shortpass Filter is supplied as a longpass / shortpass filter made from Glass. Listed geometry: size 38.0×31.0+0.0/-0.2mm, thickness 5.9+/-0.1mm, square 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 | Optical Shortpass Filter |
| Shape | Square |
| Thickness | 5.9+/-0.1mm |
| Parallelism | <1arcmin |
| Clear aperture | >35.0×29.0mm at oval track |
| Usage | Lighting, Medical, Optical, Photography, Astronomy |
| Thickness Range | 5mm-10mm |
| Color | Black |
| Principle | Selective Absorption Filter |
| Angle of incidence | 0° |
| Dimensions | 38.0×31.0+0.0/-0.2mm |
| R1 | infinity |
| R2 | infinity |
| Chamfer | 0.1-0.2mm(LW)x45deg |
| Standard | ISO 10110 |
| Supplier | CPG OPTICS LIMITED |
Technical data
| Items | Description | |
| Window | Material: | Schott RG850 |
| Dimensions: | 38.0×31.0+0.0/-0.2mm | |
| Thickness: | 5.9+/-0.1mm | |
| R1: | infinity | |
| R2: | infinity | |
| Surface quality: | S1&S2:5/3×0.16 | |
| Parallelism: | <1arcmin | |
| Clear aperture: | >35.0×29.0mm at oval track | |
| Chamfer: | 0.1-0.2mm(LW)x45deg | |
| 4x corner bevel:R8.0 +0.0/-0.2mm | ||
| Cut-off at 935+/-5nm | ||
| Standard: | ISO 10110 |
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 “0°”; interference filters shift with angle, so specify the operating angle and cone.
- Size and thickness — listed as “5.9+/-0.1mm”; 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 Shortpass Filter Glass Material for Optical Glass Assemblies. For an application example, read Custom Shortpass Filter Glass for Appliance Optical Modules. A related standard product is Shortpass Filter.
