期刊
REVIEW OF SCIENTIFIC INSTRUMENTS
卷 88, 期 9, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5000508
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资金
- ARO
- NxGen
- Corning
The production of orbital angular momentum (OAM) by using a q-plate, which functions as an electrically tunable spatial frequency filter, provides a simple and efficient method of edge contrast in biological and medical sample imaging for histological evaluation of tissue, smears, and PAP smears. An instrument producing OAM, such as a q-plate, situated at the Fourier plane of a 4f lens system, similar to the use of a high-pass spatial filter, allows the passage of high spatial frequencies and enables the production of an image with highly illuminated edges contrasted against a dark background for both opaque and transparent objects. Compared with ordinary spiral phase plates and spatial light modulators, the q-plate has the added advantage of electric control and tunability. Published by AIP Publishing.
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