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Intra-volume marking with the laser makes it possible to locally modify the refractive index of transparent materials. This modification allows you to inscribe 3D patterns to functionalize or to create a decorative effect in the material.

The characteristics of the intra-volume marking process:

Benefits Intra-volume marking


  • Localized
  • Dust free
  • High 3D resolution
  • Colour variation
Performance Intra-volume marking


  • Variation in index up to 0.01 depending on the materials
  • Precision of 1 μm in XYZ directions
  • Custom 3D patterns
Throughput Intra-volume marking


  • Processing speed: up to 100 mm.s-1 for index change
  • Colouring process speed: 1.5 m.s-1


Laser workstation - Intra-volume marking

Laser workstation

  • Pulses: femtosecond, picosecond and nanosecond
  • Wavelengths: infrared and visible
  • Numerical aperture from 0.2 to 0.4
  • DXF, JPEG implementation
Surface condition Intra-volume marking

Surface condition

Unmodified surface


Materials used for intra-volume marking:

  • Polymer
  • Organic glass
  • Doped glass
  • Industrial glass

Process sheet

Intra-volume marking

Intra-volume marking

Areas of application

  • Phase mask
  • Optical microscopy
  • Ophthalmic optics
  • Anti-counterfeiting
  • Bottle making
  • Watchmaking
  • Automobile


Associated products or services