Diffuser Kits

  • Mounted Ø1" Ground Glass Diffuser Kit (Grits: 120, 220, 600, 1500)
  • Mounted Ø1" Engineered Diffuser Kit (Square, Circular, and Line Scatter Shapes)



Engineered Diffuser


Ground Glass Diffuser


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Diffuser Selection Guide
Ground Glass Diffusers
Standard Diffusers N-BK7 Substrate Unmounted, Uncoated 350 nm to 2.0 µm
Unmounted, AR Coated 350 nm - 700 nm
650 nm - 1050 nm
Mounted, Uncoated 350 nm - 2.0 µm
UVFS Substrate Unmounted, Uncoated 185 nm - 2.0 µm
Diffuse Reflectors N-BK7 Substrate Unmounted, UV-Enhanced Aluminum Coated 250 nm - 450 nm
Unmounted, Protected Silver Coated 450 nm - 20 µm
Unmounted, Protected Gold Coated 800 nm - 20 µm
Alignment Disks
Engineered Diffusers
Diffuser Kits

Thorlabs' Diffuser Kits each contain a selection of mounted N-BK7 Ground Glass or Engineered Diffusers™. Our N-BK7 Ground Glass Diffusers are ideal for general purpose applications, while our Engineered Diffusers offer much more controlled diffusion in various distribution patterns. The diffusers in each kit come in SM1-threaded (1.035"-40) mounts, which are engraved with the item number and a brief description.

N-BK7 Ground Glass Diffusers
N-BK7 Ground Glass Diffusers provide an economical solution for a variety of applications requiring a diffuse Gaussian-like distribution. These diffusers are offered in 120, 220, 600, and 1500 grit polishes. A finer grit (e.g. 1500) has a small diffusion pattern, while a coarser grit (e.g. 120) will have a larger diffuser pattern. The DGK01 Diffuser Kit includes four Ø1" mounted ground glass diffusers, with one diffuser in each grit polish, as well as a Ø1" mounted ground glass alignment disk and a labeled storage box.

Engineered Diffusers
Thorlabs and RPC Photonics' Engineered Diffusers offer numerous advantages over traditional diffusers, providing unmatched control over light dispersion patterns and high transmission efficiency. These diffusers are transmissive from 380 to 1100 nm, and produce square, circular, or line distribution patterns with a high transmission efficiency. The EDK01 Engineered Diffuser Kit includes five Ø1" mounted diffusers, with one diffuser for each intensity profile, and a labeled storage box. For more detailed information on Engineered Diffuser technology and performance, please read our Optical Diffusers Catalog Presentation.

Posted Comments:
Matthew Bohn  (posted 2022-06-30 15:36:48.823)
1/2" diffuser plate?
ksosnowski  (posted 2022-07-01 12:02:55.0)
Thanks for reaching out to Thorlabs. Currently we only offer the 1" diffusers in the kits as these are the most popular items. We do sell 1/2" and 2" diffusers for many of the versions however and you can view the full selection here: https://www.thorlabs.com/navigation.cfm?guide_id=17.

Mounted Ground Glass Diffuser Kit

  • Material: N-BK7 (Uncoated)
  • SM1-Mounted for Easy Integration
  • Four Different Grit Levels (See Table Below)
  • Gaussian-Like Intensity Profile
  • Ground Glass Alignment Disk Included

Please see our full web presentation for mounted diffusers for performance graphs and more detailed specifications for the diffusers included in this kit.

Ground Glass Diffuser Common Specificationsa
Diffuser Diameter Ø25.4 mm (Ø1")
DIffuser Thickness 2.0 mm (0.079")
Clear Aperture >90%
Surface Flatness of Smooth Side (@ 633 nm) <4λ
Surface Quality of Smooth Side 80-50 Scratch-Dig
Parallelism <3 arcmin
DG10-1500-H1-MD Alignment Disk Specifications
Optic Diameter Ø25.4 mm (Ø1")
Optic Thickness 2.0 mm (0.079")
Center Hole Diameter Ø1 mm (Ø0.04")
Grit 1500
  • These specifications do not apply to the alignment disk, Item # DG10-1500-H1-MD
DGK01 Contents
Item # Description
DG10-120-MD Ø1", SM1-Mounted N-BK7 Ground Glass Diffuser, 120 Grit
DG10-220-MD Ø1", SM1-Mounted N-BK7 Ground Glass Diffuser, 220 Grit
DG10-600-MD Ø1", SM1-Mounted N-BK7 Ground Glass Diffuser, 600 Grit
DG10-1500-MD Ø1", SM1-Mounted N-BK7 Ground Glass Diffuser, 1500 Grit
DG10-1500-H1-MD Ø1", SM1-Mounted Ground Glass Alignment Disk, 1500 Grit
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
DGK01 Support Documentation
DGK01Ø1", SM1-Mounted N-BK7 Ground Glass Diffuser Kit, 5 Pieces

Mounted Engineered Diffuser Kit

  • Five Intensity Profiles Included
  • Square, Circular, and Line Scatter Shapes
  • Transmission Spectrum: 380 - 1100 nm
  • Achromatic Performance
  • High Transmission Efficiency

For details about the technology, specifications, and performance of the diffusers included in this kit, please see our full web presentation for Engineered Diffusers.

Engineered Diffuser Common Specifications 
Diffuser Material Injection Molded ZEONOR
Design Wavelength 400 - 700 nm (Achromatic)
Transmission Spectrum 380 - 1100 nm
Diffuser Diameter Ø25.4 mm (Ø1")
Diffuser Thickness 1.5 mm (0.06")
Incident Beam Size ≥0.5 mm
Clear Aperture 95% of Diameter
Index of Refraction 1.53
EDK01 Contents
Item # Description
ED1-C20-MD Ø1", SM1-Mounted 20° Circle Pattern Engineered Diffuser
ED1-C50-MD Ø1", SM1-Mounted 50° Circle Pattern Engineered Diffuser
ED1-S20-MD Ø1", SM1-Mounted 20° Square Pattern Engineered Diffuser
ED1-S50-MD Ø1", SM1-Mounted 50° Square Pattern Engineered Diffuser
ED1-L4100-MD Ø1", SM1-Mounted 0.4° x 100° Line Pattern Engineered Diffuser
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
EDK01 Support Documentation
EDK01Ø1", SM1-Mounted Engineered Diffuser Kit, 5 Pieces