3rd Milleninum Longpass Optical Filters

3rd Millennium Longpass Filters

The 3rd Millennium Longpass filters combine a patented, hermetic physical assembly with proprietary ALPHA Technology. A process which produces exceptionally steep cut-on slopes. This results in more precise location of cut-on points, the ability to place transmission and rejection regions extremely close together, and higher attenuation between the pass band and the rejection band.

3rd Millennium filters are also available as;

Shortpass Filters
Bandpass Filters
Fluorescence Filter sets

for more details please click on the appropriate area.

3rd Millennium Longpass Filters are available in the following configurations:

Filter Type

Wavelength
Range

Tolerance

Transmission

Blocking Range

Blocking OD

Size

Longpass

Cut-on

400 - 700nm
every 10nm

+ 3nm

> 90% peak

UV to Cut-on

OD 12 avg
OD 6 min

25mm

700 - 800nm
every 20nm

+ 3nm

> 90% peak

UV to Cut-on

OD 12 avg
OD 6 min

25mm

800 - 1100nm
every 50nm

+ 3nm

> 90% peak

UV to Cut-on

OD 12 avg
OD 6 min

25mm

How To Specify a Filter:

Longpass Filter - specify a cut-on wavelength (Example: Part Number - 3RD 650LP)

Filter Specifications:

Assembly Diameter: 25mm
Assembly Thickness: 5.5mm
Clear Aperture: 21.3mm
Substrates: SiO2 substrate with a broadband anti-reflection coating.