使用双LED照明和透镜孔径作为刀口的双向纹影成像
Bidirectional schlieren imaging using dual-LED illumination and a lens aperture as a knife-edge
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中文总结 AI 辅助
本文提出利用透镜孔径作为刀口并采用双LED照明，通过控制LED亮度实现水平和垂直纹影截止的加权组合，借助Arduino板实现与相机帧同步的快速切换，获得无串扰的双向纹影图像，并可通过后处理生成彩色序列。
中文摘要 AI 辅助
在这封信中，我们证明了采用透镜孔径作为刀口（LAKE）并使用两个相同的LED具有沿两个截止方向获得纹影图像的独特优势。可以控制LED亮度，在每个相机帧上获得水平和垂直纹影截止图像的期望加权和。通过价格实惠且可编程的Arduino板为LED供电，可以实现与相机帧精确同步的水平和垂直纹影截止之间的快速切换，从而产生无串扰的纹影图像序列。此外，经过少量后处理，这种单色图像序列可以轻松转换为彩色双向纹影图像序列。
英文摘要
In this letter, we demonstrate that employing the Lens Aperture as a Knife-Edge (LAKE) with two identical LEDs has the distinct advantage of obtaining schlieren images along two cutoff orientations. It is possible to control LED brightness to obtain a desirable weighted sum of both horizontal and vertical schlieren cutoff images on each camera frames. Powering the LED sources by an affordable and programmable Arduino board enables a rapid switch between the horizontal and vertical schlieren cutoff that is exactly synced to the camera frames, resulting in crosstalk-free schlieren image sequence. Furthermore, with a little postprocessing, this monochrome image series can be easily transformed into a colorful sequence of bidirectional schlieren images.
发表机构
- Indian Institute of Technology Delhi（印度德里理工学院）
机构由 AI 辅助整理，请以论文原文为准。
