6533b7dafe1ef96bd126eac9
RESEARCH PRODUCT
Pulse-frequency-modulated high-frequency-carrier diffractive elements for pattern projection
Jari TurunenJukka P. PekolaEero Tervonensubject
PhysicsDiffraction0303 health sciencesbusiness.industryGeneral Engineering01 natural sciencesAtomic and Molecular Physics and Opticslaw.invention010309 optics03 medical and health sciencessymbols.namesakeOpticsFourier transformModulationlaw0103 physical sciencessymbolsPhotolithographybusinessLithographyFrequency modulationRealization (systems)Linear phase030304 developmental biologydescription
An efficient two-stage algorithm is presented for the synthesis of high-frequency-carrier diffractive elements. First, an on-axis phase-only stripe-geometry element with an unconstrained profile along each stripe is designed by an iterative Fourier transform algorithm. In the second stage, a steep linear phase term is added, and the profile is hard-clipped along each stripe. The result is a binary, pulse-frequency-modulated element suitable, e.g. , for a resonance-domain realization, which permits the elimination of the twin image. Experimental results are provided by direct-write electron-beam lithography and optical lithography, using both fully and partially coherent illumination.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1994-08-01 | Optical Engineering |