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:
Anzhou Wang  (posted 2022-03-16 15:51:38.043)
Hi. What is the damage threshold for this mirror? I am considering to use this mirror for high power pulsed laser. Thx
cdolbashian  (posted 2022-03-25 08:48:27.0)
Thank you for reaching out to us regarding this damage threshold inquiry. We do not have a general damage threshold to share here, but I have emailed you directly to learn more about your laser parameters. Given those values, we should be able to determine whether or not your laser will be compatible with these mirrors.
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