UV/Excimer Dichroic Filter

Come see us at Photonics West 2012, Booth #1707

Monday, 06 February 2012

UV/Excimer Dichroic Filter

Dichroic Filter coatings are designed to transmit one spectral region (passband) and reflect another (rejection band). The filter is a Short Wave Pass if the passband is to the left of the transition slope, and a Long Wave Pass if the passband is to the right of the slope. The advantages of dichroic filters over colored glass filters are: 1) the rejection band is reflected rather than absorbed; 2) steeper transition slope between the passband and the rejection band; i.e. sharper cut-on or cut-off; 3) coatings can be custom designed for specific center wavelengths.

RMI Standard Specifications
Angle of Incidence:	0º or 45º
Passband:	T = 50% + 5% at λ₀ T_avg > 90% at 0º T_avg > 85% at 45º
Rejection Band:	R_avg > 99% at 0º R_avg > 98% at 45º
Damage Threshold:	3 J/cm², 10 ns pulse

Short Wave Pass Filter Coating Transmission Curve

Short Wave Pass Filter coating sample transmission curve with a cutoff at 355 nm

Long Wave Pass Filter Coating Transmission Curve

Long Wave Pass Filter coating sample transmission curve with a cutoff at 355 nm

Call 303-664-5000 to discuss your optical requirements
Toll Free: 1-866-678-4270 Fax: 303-664-5001 Email: Sales@RMIco.com
Rocky Mountain Instrument Co. • 106 Laser Dr., Lafayette, CO • 80026 • USA

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