Product type: Optical Longpass Filter. Application: Lighting, Medical, Optical, Photography, Astronomy. Model: Bandpass filter.
Overview
Optical Cemented Assembly Long Pass Filter is a longpass / shortpass filter made from Glass. Listed geometry: diameter 15.0+/-0.2mm, thickness 3.1+/-0.4mm. Surface quality 60-40. 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 Longpass Filter |
| Shape | Customized |
| Diameter | 15.0+/-0.2mm |
| Thickness | 3.1+/-0.4mm |
| Surface quality | 60-40 |
| Parallelism | <3arcmin |
| Clear aperture | >90% |
| Usage | Lighting, Medical, Optical, Photography, Astronomy |
| Model NO. | Bandpass filter |
| Thickness Range | 2mm-5mm |
| Color | Transparent |
| Principle | Long Pass |
| Angle of incidence | 0° |
| Specifications | Items |
| R1 | infinity |
| R2 | infinity |
| Chamfer | protected |
| AOI | 0deg |
| Standard | MIL-PRF-13830B |
| Supplier | CPG OPTICS LIMITED |
Technical data
| Items | Description | |
| Filter Assembly | Material: | Borofloat 33 |
| Schott OG590 | ||
| Diameter: | 15.0+/-0.2mm | |
| Thickness: | 3.1+/-0.4mm | |
| R1: | infinity | |
| R2: | infinity | |
| Flatness: | N/A | |
| Surface quality: | 60-40 | |
| Parallelism: | <3arcmin | |
| Clear aperture: | >90% | |
| Chamfer: | protected | |
| Coating: | AOI:0deg | |
| Assembly then yields a bandpass 650nm,FWHM 150nm | ||
| Total fluctuation of transmission in range 630-680nm < 4% | ||
| 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 “0°”; interference filters shift with angle, so specify the operating angle and cone.
- Size and thickness — listed as “15.0+/-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 — listed as “60-40”; 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 Longpass Filter.
