02 Jan 2007 Cut-off type, Selective absorption type and Neutral Density type 1. Cut-off type: Block the short wavelength by absorption and transmit the long wavelength.
2. Selective absorption type: Transmission (or absorption) one wavelength (or several wavelengths).
3. Neutral Density type: Similar absorption for the whole visible wavelength range.
Fabrication Capability:
Shape: Rectangle or Circle
Dimension: Up to 200mm
Surface quality: 60-40 commonly, up to 40-20
Flatness: Lambda/4 commonly, up to Lambda/10
Parallelism: < 30", up to 3"
AR coating is available upon request. |
