Gentec-EO Accessories for Beam Diagnostics - Manual (Page 10)

Accessories for Beam Diagnostics Revision 1.2 10
2.3. UG11-UV – UV BANDPASS FILTER
Gentec-EO also offers a color glass filter specially designed for UV wavelengths. The UG11-UV filter transmits
20% to 70% of the incident light, depending on wavelength. It is particularly useful for applications with
wavelengths ranging between 250 nm and 370 nm. Other wavelengths are stopped by the filter. The UG11-UV is
SM1 threaded and comes with a SM1 to C-mount adaptor.
Table 5: UG11-UV Bandpass Filter Specifications
Spectral Range 250 nm – 370 nm
Diameter 25 mm Ø
Clear Aperture 80% of area
Dimensional Tolerance +0.0/-0.2 mm
Thickness 2 mm
Thickness Tolerance +0.0/-0.2 mm
Parallelism < 3 arcmin
Surface Flatness < λ/4
Maximum Power 1 W
Surface Quality 40-20 Scratch-Dig
Damage Threshold 30 W/cm
2
(typical)
Part Number 202602
Data specified at 633 nm
Warning
It is important to remove the ND 4.0 filter that comes with the Beamage-3.0 before using
the UG11-UV Bandpass Filter.
Figure 5: Transmission Curve of all ND Filters and UG11-UV Bandpass Filter