Laser 2000

365 nm MaxLamp™ Mercury line filter

Semrock Logo

These high-performance mercury line filters are ideal for use with high-power mercury arc lamps for spectroscopy, optical metrology and photolithography mask-aligner and stepper systems. Maximum throughput is obtained by careful optimization fo the filter design to allow fo use in a variety of different applications. The non-absorbing blocking ensures that all other mercury lines as well as intra-line intensity are effectively eliminated.

Note on spectral plots:
In the past, each shipment has included a spectral plot for every filter and every lot code in the shipment. In an effort to be more eco-friendly, we will no longer be including these plots with each shipment. If you require spectral plot data, please see here for more information.

Optical Specifications
Transmission BandTavg > 93% 360 – 372 nm
Transmission Wavelength366 nm
Transmission Wavelength Range360 - 372 nm
FWHM Bandwidth16.6 nm
Blocking BandODavg > 6 200 – 348 nm
ODavg > 5 382 – 500 nm
ODavg > 2 500 – 700 nm

General Specifications
Mercury Line365 nm
Angle of Incidence0 ± 7 °
Cone Half-angle10 °
Filter Effective Index1.99 Understanding 'Effective Index of Refraction' neff
Optical Damage RatingTesting has proven to show no signs of degradation when exposed to at least 6.0 W of power from an unfiltered xenon arc lamp over a 25 mm diameter (corresponding to 1.2 W/cm²) for over 500 hrs.

Physical Specifications (for standard parts - please contact us for custom sizes)
Mounted / UnmountedMounted
Size25 x 3.5 mm
Transverse Dimensions, Diameter25 mm
Transverse Tolerance, Mounted+ 0.0 / - 0.1 mm
Filter Thickness, Mounted3.5 mm
Filter Thickness Tolerance, Mounted± 0.1 mm
Clear Aperture≥ 22 mm
≥ 45 mm
Surface Quality (Scratch-Dig)80-50
Substrate Thickness2.0 mm
Substrate TypeLow-autofluorescence optical quality glass
OrientationArrow on ring indicates preferred direction of propagation of light


  • Size: 25 x 3.5 mm


Loading chart data...

Optical Density

Loading chart data...

Semrock Spectral Plot Info

Request a Demo


Ask the Expert

If you’re interested in the products shown here, or have questions about something you can’t find on our website, please get in touch through the form below.

Our knowledgeable sales team will be happy to help. We can normally source exactly what you need, or work with you to come up with custom solutions.

Alternatively, just call +44 (0) 1933 461 666 and ask to speak to the Photonics team.