一种基于空间成像系统的高精度光斑测试系统及方法
By using a spot measurement method based on a space imaging system, and utilizing a lens combination and a CCD camera to measure the far-field divergence angle of the spot, the problem of inaccurate measurement of the emitted spot in optical communication is solved, high-precision spot measurement is achieved, and the coupling efficiency and signal-to-noise ratio of the optical communication system are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- LIOBATE TECH LTD
- Filing Date
- 2022-09-27
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies make it difficult to accurately measure the size of the emitted light spot, resulting in low coupling efficiency, high energy consumption, and reduced signal-to-noise ratio in optical communication systems. This is mainly due to the mismatch between the emitted light spot and the designed light spot caused by differences in materials, processes, and environment.
A high-precision spot testing method based on a spatial imaging system is adopted. By selecting appropriate lens combinations and calibration processes, the far-field divergence angle of the spot is measured using a CCD camera, and the Gaussian spot size is derived. This includes the parameter configuration of high-magnification objectives, Fourier lenses, imaging lenses, and CCD cameras. Stray light is filtered out by combining variable apertures and Kohler lenses.
It enables precise measurement of light spots of micron-scale light-emitting elements, with a measurement range covering sub-millimeter to sub-micron and wavelengths covering visible light to near-infrared. The measurement error is within 5%, and it is applicable to both active and passive optical devices, improving the accuracy of optical research and engineering design.
Smart Images
Figure CN115628686B_ABST