Focal length measurement by calculating Fourier transform spectrum interference fringes of symmetric double circular apertures
- Received Date: 1999-07-26
- Accepted Date: 1999-12-22
- Available Online: 2001-01-25
Abstract: A method of focal length measurement by calculating Fourier transform spectrum interference fringes of symmetric double circular apertures with small distance is presented.The setup is simple with high accuracy.The principle is described and the error is analyzed.The consistent experimental results are also given in the paper.