GB/T 43690-2024
Method for measuring the diffraction efficiency of imaging diffractive optical elements (English Version)
- Standard No.
- GB/T 43690-2024
- Language
- Chinese, Available in English version
- Release Date
- 2024
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China CN / GB
- Latest
- GB/T 43690-2024
- Introduction
1. Background and significance of the standard
GB/T 43690-2024 "Measurement method of diffraction efficiency of imaging diffractive optical elements" is one of the important standards in my country in the field of photonics and optical testing technology. The standard was drafted by Changchun University of Science and Technology, Institute of Space Information Innovation, Chinese Academy of Sciences and other institutions, aiming to provide a unified technical specification for the performance evaluation of imaging diffractive optical elements.
2. Comparative analysis of standard frameworks
Standard dimensions GB/T 43690—2024 International comparison Measurement principle Based on Fraunhofer diffraction and Bessel function analysis Consistent with ISO international standards, some details are more specific Scope of application Diffraction efficiency measurement of imaging diffractive optical elements Covering more complex optical system test scenarios Technical indicators Light source wavelength accuracy ±0.1%, strict environmental control requirements (temperature ±0.5℃, humidity ≤70%) On par with international leading standards 3. Core Technology Interpretation
Diffraction efficiency calculation formula: Formulas (1) and (2) used in the standard are the key to measurement. The pinhole aperture is used to optimize the main diffraction order energy ratio, combined with the energy analysis of the reference light path, to ensure high-precision measurement results.
4. Implementation Suggestions and Precautions
4.1 Calibration Instrument Requirements
- Ensure that the number of effective digits of the photodetector is not less than 4 decimal places
- The dimensional accuracy of the spatial filter and the pinhole aperture must meet the calculation requirements of the formula
- Light source wavelength stability test: It is recommended to use a continuously tunable laser for calibration
4.2 Experimental Environment Control
- The laboratory temperature is recommended to be maintained at 20℃±0.5℃ and the humidity is ≤70%
- The surface of the optical component needs to be cleaned regularly to prevent dust from interfering with the measurement results
- When adjusting the optical path, ensure that the center alignment error of all optical components does not exceed λ/4
4.3 Data Processing Suggestions
- Take the average value of at least 3 measurements to reduce the impact of accidental errors
- Fill in the parameter settings and result analysis of each set of experiments in detail in the data record table
- Performance evaluation based on the deviation between the theoretical calculated value and the actual measured value (Δη(λ))
GB/T 43690-2024 history
- 2024 GB/T 43690-2024 Method for measuring the diffraction efficiency of imaging diffractive optical elements
