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Photothermal instruments
Low absorption tests in solids, liguids, gases
- space and time-resolved
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Photothermal systems

Based on Photothermal Common-Path Interferometer (PCI) concept

The instrument
  • Detects the thermal effect of absorption.
  • Insensitive to scattering.
  • Has moderate 3D resolution:
    • test substrate behind the coating, interface between bonded parts
    • make 2D or 3D maps of absorption patterns
  • Can be used to monitor induced, time-dependent absorption:
    • gray tracks,
    • laser-induced transparency (bleaching),
    • initial stages of optical damage, etc.
Custom made systems
If you have any special requirements for materials characterization or you'd like to integrate PCI in your quality control system or you are just looking for a bit different resolution, spectral range, scanning speed or any other parameter which our standard Solano and Quad instruments do not meet we'll be glad to consider your inquiry!
Common applications
Initial stages of optical damage to glasses and crystals
- blanks
- OH groups
- Surface defects and surface contamination of substrates: fused silica, sapphire, LiNbO3, KTP and TeO2
3D map of bulk absorption (glasses and crystals)
- Longitudinal front-back surface scans
- Absorption in interfaces
- Absorption losses in multi-layered HR dielectric mirrors and AR coatings deposited onto fused silica, BK7, sapphire and other substrates
- Spatial transverse resolution
60-80 m
- Spatial longitudinal resolution
0.6 mm*
- 2D map of surface absorption
Induced absorption effects
- Green light-induced IR absorption in lithium niobate/tantalate family of crystals including periodically-poled crystals
- Optical bleaching in organic dyes
- Gray track kinetics and gray track shape in KTP family of crystalss
* approximate number (depends on the type of tested optical material)
Stanford Photo-Thermal Solutions
Tel.: +1 408 898-0446

E-mail: info@stan-pts.com
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