GB/T 16601.4-2017Lasers and laser-related equipment -- Test methods for laser-induced damage threshold -- Part 4: Inspection, detection and measurement (English PDF)

Foreword

GB/T 16601 "Laser and laser related equipment laser damage threshold test method", divided into the following four parts.

--- Part 1. Definitions and general principles;

--- Part 2. Threshold determination;

--- Part 3. Laser power (energy) withstandability is convinced;

--- Part 4. Inspection, detection and measurement.

This part is the fourth part of GB/T 16601.

This part is drafted in accordance with the rules given in GB/T 1.1-2009.

This section uses the redrafting method to modify the laser damage threshold for lasers and laser-related equipment using ISO/T R21254-4.2011 Test Methods Part 4. Inspection, Detection and Measurement.

The technical differences between this part and ISO/T R21254-4.2011 and their reasons are as follows.

---About the normative reference documents, this part has made technical adjustments to adapt to China's technical conditions, adjustments the situation is reflected in Chapter 2, "Regulatory References", and the specific adjustments are as follows.

- Replaced ISO 11145 with GB/T 15313-2008 modified to adopt international standards;

- Replaced ISO 21254-1 with GB/T 16601.1-2017 modified to adopt international standards;

Introduction

Laser damage threshold detection procedures often require techniques that are sensitive to surface inspection and damage detection. Typical detection in the protocol, each sample was examined microscopically prior to testing to assess its surface quality and grade of disease. S to 1 damage test Various online monitoring schemes can be applied during the irradiation of the sample.

Examples of such methods include detection of scattered light in a sample test area, acquisition of sample plasma radiation, or a photothermal detection scheme.

In most cases, the detection system is directly connected to the laser source to quickly interrupt laser irradiation of the sample after the damage has occurred. this is okay Avoid catastrophic damage to the sample and accurately determine the number of laser pulses at the time the damage first occurred. And tested continuously in the process, the direct information of the damage state can be processed to determine the optimal value of the subsequent test laser energy, and the uncertainty of the detection is reduced.

For the same reason, complex detection schemes based on direct imaging and online image processing are often used in 1-to-1 damage testing equipment.

After the sample is irradiated with laser pulses, appropriate inspection techniques are used to identify the damage points and obtain information on the mechanism of the damage. In order to obtain Accurate damage thresholds are necessary for testing test points because this is the ultimate and most sensitive assessment of the damage state.

This section describes the inspection techniques for optical surfaces before and after damage testing and the damage detection techniques integrated in the detection equipment. Headquarters the damage detection method described by the sub-division is an example of a damage test solution that has been tested and often applied to detection equipment. This section the application of other solutions that can be used for optical component damage detection or inspection is not excluded.

Laser and laser related equipment laser damage threshold Test methods - Part 4. Inspection, detection and measurement

1 Scope

This part of GB/T 16601 specifies methods for inspection, detection and measurement of laser damage on the surface and inside of optical components.

This section applies to the inspection, detection and measurement of laser damage on the surface and internal of optical components.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 15313-2008 Laser terminology (ISO 11145:2006, MOD) GB/T 16601.1-2017 Laser and laser related equipment - Test methods - Part 1 . Definitions and general (ISO 21254-1:2011, MOD)

3 Terms and definitions

The terms and definitions defined in GB/T 15313-2008 and GB/T 16601.1-2017 apply to this document.

4 Damage detection method