ISO LIDT Certification Test (21254-1,3)

This technique is designed to separate good and bad optics when end-use irradiation conditions are known. The procedure is fast and non-destructive for good optical elements.

Laser Damage Certification (Pass/Fail Test) explained:

Use this test for:

  • Checking/certifying laser damage performance of the entire production batch;
  • Check purchased optic’s quality before use in critical applications;
  • Inspect whether optical element meets qualifications;
  • Validation of optics lifetime predictions;

Test description

To perform the Pass/Fail certification test procedure several test sites (minimum – 1, typically – 10, best – as many as possible) are selected on the test area. Each of those sites is then interrogated with a fixed laser irradiation level. In case all test sites survive irradiation without damage sample is certified as good enough for further use. Otherwise, the component does not meet the specifications and cannot be used anyway.

Known limitations and risks:

  • False-negative results are possible if optical element has low defect density (use raster scan instead);
  • False-negative results are possible if there is a delayed fatigue effect (use extended irradiation dose if possible);
  • No information about the actual LIDT;

Most popular test parameters for this test

Wavelength Pulse duration(1) Repetition rate Pulses per irradiation level
1064 nm 8-10 ns 100 Hz 1 000
532 nm 5 ns 100 Hz 1 000
355 nm 5 ns 100 Hz 1 000
Custom Check all availability or configure your own at

(1) effective pulse duration measured at Full Width Half Maximum


Check out all available testing capabilities. Identify your system in our “Available testing conditions” table.

Test bundles and packages

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  • Optics Characterization Bundle for CW regime at 1070 nm
    The testing package consists of multiple tests, which are carefully selected to address optics characterization issues at the CW regime.
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  • Lifetime + Certification Bundle for Industrial Grade fs-ps Laser Optics
    The package consists of several tests carefully selected to address optics certification for critical applications.
    Find out more

more tools
and useful information

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  • Testing conditions

    Check out all available laser damage testing conditions (wavelengths, pulse regimes, environments, and more).
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  • Laser Damage infobase

    Check out a useful glossary of terms and simple explanations related to the main topics of laser damage terminology.
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  • Online Fluence calculator

    Check out a calculator equipped with laser-related calculus that is frequently required in practice: such as laser fluence.
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  • Downloads and docs

    Here you can download all information about laser damage testing available at Lidaris.
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  • New client guide

    Here you will find usefull guidlines and suggestions for everyone, who is new the laser damage field.
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  • Orders FAQ

    Fast way to find out about test samples prepration, handling, and shipping.
    Find out more


Feel free to let us know if you have any concerns. We can always help you with choosing the right solution for your specific needs.