Holographic axilens: high resolution and long focal depth
- 1 April 1991
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 16 (7) , 523-525
- https://doi.org/10.1364/ol.16.000523
Abstract
We report a novel aspheric holographic optical element, the holographic axilens, for achieving extended focal depth while keeping high lateral resolution. The element is designed according to special optimization techniques and recorded as a computer-generated hologram. The results for a specific element, which has a depth of focus of 30 mm, a lateral resolution of 80 μm, a focal length of 1250 mm, and a diameter of 12.5 mm at a wavelength of 633 nm, are presented.Keywords
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