Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1540672 | Optics Communications | 2008 | 5 Pages |
Abstract
A method based on double imaging is proposed for three-dimensional focus manipulation. A thin birefringent plate placed behind a focusing lens was applied to generate two foci with a separation smaller than the original DOF. Depth of focus enlargement of 227% was achieved without serious degradation in lateral resolution. Experimental results obtained by using a confocal arrangement were in good agreement with theory. Both theoretical considerations and experimental results showed that in non-paraxial case the ordinary and extraordinary foci could not be excited independently.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Miklós Erdélyi, Miklós Bereznai, Gábor Gajdátsy, Zsolt Bor,