Space worthy
Characteristic features of astronomical filters include high imaging quality, precise and steep edges, space-qualified materials and large mechanical dimensions.
In addition to custom-made products, we also offer off-the-shelf variants such as Bessel Photometric variations or SDSS Photometric sets.
Specifications of typical astronomical filters:
- Wavefront aberration < ¼ per inch
- Wedge angle < 30 arcsec
- Flatness: ¼ per inch
- Surface finish: E/E defined according to MIL-C-48497A
- Reflectance typically < 0.5% to improve transmission and prevent ghost images
- Anti-reflective coatings
