| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10408768 | Optics and Lasers in Engineering | 2005 | 11 Pages |
Abstract
In this paper, we present a novel method for testing the long focal length lens of large aperture, which is realized by calculating the angle of moiré fringe formed by Talbot image of two Ronchi gratings. A scanning method was developed to measure the focal length with the collimated lights projected on the different aperture position of the lens. Experiment data demonstrates that this method can be applied to the real-time long focal length measurement with high accuracy.
Related Topics
Physical Sciences and Engineering
Engineering
Electrical and Electronic Engineering
Authors
Hou Changlun, Bai Jian, Hou Xiyun, Sun Chen, Yang Guoguang,