Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1541893 | Optics Communications | 2007 | 6 Pages |
Abstract
We propose an experimental method to coherently mosaic two planar diffraction gratings. The method uses a Twyman–Green interferometer to guarantee the planar parallelism of the two sub-aperture gratings, and obtains the in-plane rotational error and the two translational errors from analysis of the far-field diffraction intensity patterns in two alignment wavelengths. We adjust the relative attitude and position of the two sub-aperture gratings to produce Airy disk diffraction patterns in both wavelengths. In our experiment, the repeatability of in-plane rotation adjustment was 2.35 μrad and that of longitudinal adjustment was 0.11 μm. The accuracy of lateral adjustment was about 2.9% of the grating period.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Yao Hu, Lijiang Zeng, Lifeng Li,