Three -dimensional phase measurement of transparent gas by high -speed digital holographic tomography system

被引：2

作者：

Xia, Peng ^{[1
]}

Ri, Shien ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Res Inst Measurement & Analyt Instrumentat, Natl Metrol Inst Japan NMIJ, Tsukuba, Ibaraki 3058568, Japan

来源：

OPTICS AND LASERS IN ENGINEERING | 2023年 / 168卷

基金：

日本学术振兴会;

关键词：

Holographic tomography; Phase measurement; Off-axis multiplexing; High-speed 3D imaging; REFRACTIVE-INDEX; TEMPERATURE; INTERFEROMETRY; RETRIEVAL; FLAMES;

D O I：

10.1016/j.optlaseng.2023.107656

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A high-speed digital holographic tomography system based on off-axis multiplexed recording is proposed for fast three-dimensional (3-D) phase measurements of transparent gasses. Object beams pass through the object at 0, 45, 90, and 135 degrees and interfere with the reference beam to form a hologram that is recorded by a single camera. The phase information of each optical path is reconstructed by the Fresnel diffraction integral calculation, and then the 3-D phase information of the object can be obtained by the simple back-projection algorithm. The recording speed of the system depends entirely on the frame rate of the camera. In the experiments, we successfully measured the 3-D phase information of an asymmetric gas flow with the proposed system at 65 frames per second.

引用

页数：7

共 43 条

[11] Three-dimensional imaging of distribution of refractive index by parallel phase-shifting digital holography using Abel inversion [J].