GB/T 11297.1-2017 in English
VALIDTest method for wavefront distortion of laser rods
- Issued on:2017-05-31
- Implemented on:2017-12-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$136.00
《GB/T 11297.1-2017激光棒波前畸变的测量方法》由339-1（工业和信息化部（电子））归口，主管部门为工业和信息化部（电子）。
Introduction
1. Background of standard formulation and analysis of technological evolution
GB/T 11297.1-2017 "Measurement method of wavefront distortion of laser rods" is an important standard for the laser field, replacing the old version GB/T 11297.1-2002. The new standard has made important revisions in terms of test conditions, requirements for laser rods to be tested, and test equipment.
2. Comparative analysis of standard frameworks
| Standard version | Test conditions | Requirements for tested laser rods | New content |
|---|---|---|---|
| GB/T 11297.1—2002 | - Temperature: $25^\circ\mathrm{C}\pm2^\circ\mathrm{C}$ - Relative humidity: ≤80% | - Parallelism better than $50''$ - No specific end face pitting and scratch restrictions | No measurement precision requirements |
| GB/T 11297.1—2017 | - Temperature: $22^\circ\mathrm{C}\pm5^\circ\mathrm{C}$ - Relative humidity: ≤85% | - Parallelism better than or equal to $30''$ - End surface pitting diameter φ0.004mm~φ0.1mm, number less than $0.8D_\mathrm{0}$ | Increase measurement precision requirements (≤10%) |
3. Interpretation of standard technical specifications
3.1 Test conditions and environmental control
Test temperature: $22^\circ\mathrm{C}\pm5^\circ\mathrm{C}$, to ensure that the thermal expansion coefficient of the laser rod material has an acceptable range on the wavefront distortion.
Relative humidity: ≤85%, to prevent moisture in the air from affecting the test accuracy.
3.2 Requirements for the laser rod to be tested
- End face parallelism: better than or equal to $30''$, to ensure the accuracy of wavefront distortion measurement;
- End face perpendicularity to the rod axis: better than or equal to $5^\prime$, to reduce the influence of optical path deviation;
- End face cleanliness: no obvious dust and stains, to avoid optical interference.
4. Implementation Suggestions
Test equipment selection:It is recommended to use a digital wavefront interferometer with a resolution of 128×128 pixels or above to ensure that the measurement accuracy requirements are met.
Environmental control:The test should be carried out in a constant temperature and humidity environment. It is recommended to use professional equipment to maintain stable laboratory conditions.
Data processing:According to equations (1) and (2), the test wavelength is converted to the working wavelength of the laser rod to ensure the accuracy of the measurement results.
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