✦ LIBER ✦
A simple real-time method for checking parallelism between the two gratings in Talbot interferometry
✍ Scribed by Qian Liu; Ryoji Ohba
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 203 KB
- Volume
- 175
- Category
- Article
- ISSN
- 0030-4018
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✦ Synopsis
A simple and practical detection method for the tilt-angles between the two non-parallel grating planes in the Talbot interferometry is proposed. It uses a pair of the cross-gratings and can simultaneously measure the two small angles with respect to the axes parallel to the line directions of the grating. The method is suitable not only for real-time measurement but also for automatic checking by digital Talbot interferometry based on the computer processing. The theoretical analyses coincide with experimental results.