Kr-Ion Laser Mirrors

  • 45º Angle of Incidence
  • Ravg > 99.7% from 520 nm to 647 nm


Ø1" Kr-Ion Laser Mirror


Ø19 mm Kr-Ion Laser Mirror

Back Side
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Item # NB07-J11 NB1-J11
Wavelength Range 520 - 647 nm
Reflectance Ravg > 99.7%
Angle of Incidence 45°
Substrate Material Fused Silica
Front Surface Flatness λ/10
Diameter Ø19 mm Ø25.4 mm
Diameter Tolerance +0.0 / -0.1 mm
Clear Aperture >80% of Diameter
Back Surface Fine Grounda
Thickness 6.0 ± 0.2 mm
Parallelism ≤3 arcmin
Surface Quality 10-5 Scratch-Dig
  • A fine ground back surface is frosted and will diffuse light that is not reflected by the mirror's front surface.


  • 45° Angle of Incidence
  • Ravg > 99.7% from 520 to 647 nm

The Kr-Ion laser line mirror has a specialized coating that provides a high reflectance over the 520 - 647 nm wavelength range. These mirrors are suitable for use with the output beam from large-frame, high-powered CW (continuous wave) Kr-Ion lasers.

Our Ø19 mm mirror is specifically designed to fit our Polaris® Fixed Optic Mounts for laser system design and other OEM applications. This diameter provides a larger clear aperture than Ø1/2" optics while allowing the mounts to maintain a Ø1” footprint.

Click to Enlarge

Click Here for Data from 200 nm to 25 µm
Optic Cleaning Tutorial
Optical Coatings

Posted Comments:
nsj31  (posted 2014-10-27 12:59:35.577)
Hi, Could you please let me know the reflectance of this mirror at 400-410 nm range? I need it to be AR coated in this range and with reflectance in 520-650 nm. Cheers.
besembeson  (posted 2014-10-30 01:59:11.0)
Response from Bweh at Thorlabs USA: We actually have this data on the website. Just below the plot at the following link is the excel data between 200nm and 25um: I have also sent this to you by email.
bdada  (posted 2011-10-25 23:23:00.0)
Response from Buki at Thorlabs: Thank you for your interest in Thorlabs products. The NB1-J11 is designed to provide an average of 99.7% across a wavelength range of 520-647nm. We have broadband dielectric mirrors with a 400 - 750nm coating that provides an average of 99% reflectivity. We will contact you to see if our broadband mirror could be suitable for your application.
info  (posted 2011-10-22 19:50:01.0)
Please could you supply a coating curve for this mirror please (NB1-J11) for the 400-700nm range? Many Thanks.
Greg  (posted 2011-01-13 08:04:42.0)
A response from Greg at Thorlabs to kyle.frische: We currently do not offer a Kr-Ion mirror for 406 - 413 nm. However, our -E02 coated mirrors offer better than 99% reflectance from 400 nm to 750 nm.
kyle.frische  (posted 2010-12-29 13:07:34.0)
I need a Kr-Ion mirror for 406-413nm Krypton lines.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
NB07-J11 Support Documentation
NB07-J11Ø19 mm Kr-Ion Laser Mirror, 520-647 nm, 45° AOI
NB1-J11 Support Documentation
NB1-J11Ø1" Kr-Ion Laser Mirror, 520-647 nm, 45° AOI