Product type: Color Filter. Application: Lighting, Medical, Optical, Photography, Astronomy.
Overview
The 50.8X50.5X3mm Gg495 Coated Optical Longpass Lp Filter is supplied as a longpass / shortpass filter made from Schott Gg495. Listed geometry: size 50.8×50.5+0.0/-0.2mm, thickness 3.0+/-0.1mm, square shape. Coating: Coated. It is used in 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 | Schott Gg495 |
|---|---|
| Type | Color Filter |
| Shape | Square |
| Thickness | 3.0+/-0.1mm |
| Coating | Coated |
| Parallelism | <3arcmin |
| Clear aperture | >90% |
| Usage | Lighting, Medical, Optical, Photography, Astronomy |
| Color | Transparent |
| Principle | Selective Absorption Filter |
| Angle of incidence | 45° |
| Thickness Range | 2mm-5mm |
| Dimensions | 50.8×50.5+0.0/-0.2mm |
| R1 | infinity |
| R2 | infinity |
| Chamfer | <0.25mmx45deg |
| Standard | MIL-PRF-13830B |
| Applications | . fluorescence microscopy |
| Supplier | CPG OPTICS LIMITED |
Technical data
| Items | Description | |
| Filter | Material: | Schott GG495 |
| Dimensions: | 50.8×50.5+0.0/-0.2mm | |
| Thickness: | 3.0+/-0.1mm | |
| R1: | infinity | |
| R2: | infinity | |
| Surface quality: | S1&S2:60-40 | |
| Parallelism: | <3arcmin | |
| Clear aperture: | >90% | |
| Chamfer: | <0.25mmx45deg | |
| Coating: | Coated | |
| 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 “3.0+/-0.1mm”; give outline, thickness and tolerance, and whether the filter is mounted.
- Substrate — listed as “Schott Gg495”; 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 Selecting Longpass Filter Glass for Precision Optical Systems. For an application example, read Custom Shortpass Filter Glass for Appliance Optical Modules. A related standard product is Shortpass Filter.
