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12 October 1994 Spiral diffractive optical elements
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Proceedings Volume 2169, Nonconventional Optical Imaging Elements; (1994)
Event: International Colloquium on Nonconventional Optical Imaging Elements, 1993, Rydzyna-Rokosowo, Poland
Conventional diffractive optical elements with symmetry of revolution like spherical zone plate or axicons are modified by an addition of linear phase change n(theta) along the angular coordinate, where n is a natural number. In consequence of such manipulation the zone borders convert from circles into spirals and the elements modified in this way exhibit a dark dip in the center of the intensity distributions of their diffraction fields, in some cases (e.g. for n equals 1) smaller than the position of the first minimum of the respective distribution of the conventional case. The new family of elements is illustrated by examples of a spiral zone plate as well as spiral linear and logarithmic axicons, and their possible applications in alignment techniques are discussed.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Zbigniew Jaroszewicz and Andrzej Kolodziejczyk "Spiral diffractive optical elements", Proc. SPIE 2169, Nonconventional Optical Imaging Elements, (12 October 1994);


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