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- Ekberg, Mats, 1961, et al.
(författare)
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Multilevel phase holograms manufactured by electron-beam lithography
- 1990
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Ingår i: Optics Letters. - 0146-9592 .- 1539-4794. ; 15, s. 568-569
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Tidskriftsartikel (refereegranskat)abstract
- Ten-level transmission phase holograms (kinoforms) manufactured in one resist layer by electron-beam lithography are reported for the first time to the authors' knowledge. The measured hologram diffraction efficiencies were 70% for the two resist materials used. This corresponds to 82% of the maximum theoretical value for these holograms and is, to the authors' knowledge, the highest reported to date
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- Engström, David, 1976, et al.
(författare)
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Beam steering with four-level phase-modulating SLM
- 2002
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Ingår i: in OSA TOPS, Vol 75, Diffractive Optics and Micro-Optics, OSA Technical Digest, Postconference Edition. ; 75, s. 14-16
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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- Gosch, M., et al.
(författare)
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Parallel dual-color fluorescence cross-correlation spectroscopy using diffractive optical elements
- 2005
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Ingår i: Journal of Biomedical Optics. - : SPIE-Intl Soc Optical Eng. - 1083-3668 .- 1560-2281. ; 10:5
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Tidskriftsartikel (refereegranskat)abstract
- Dual-color cross-correlation spectroscopy allows the detection and quantification of labeled biomolecules at ultra-low concentrations, whereby the sensitivity of the assay correlates with the measurement time. We now describe a parallel multifocal dual-color spectroscopic configuration employing multiple avalanche photodiodes and hardware correlators. Cross-correlation curves are obtained from several dual-color excitation foci simultaneously. Multifocal dual-color excitation is achieved by splitting each of two laser beams (488 and 633 nm) into four sub-beams with the help of two 2 X 2 fan-out diffractive optical elements (DOES), and subsequent superposition of the two sets of four foci. The fluorescence emission from double-labeled biomolecules is detected by two 2 x 2 fiber arrays.
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