We present and analyze new multifocal optical elements based on an annular distribution of the transmittance. These elements provide selectable number of foci and can be designed to work between two fixed positions or even to provide extended focal depth. The energy of the foci can be modulated through a single parameter that controls the area of each ring. In our study we analyze the quality of the peaks and also the limit number of foci that can be obtained. The properties shown by these elements make them usable in instrumental optics or in ophthalmic optics, as new intraocular implants, where multifocal elements are required. The implementation has been done on a twisted nematic spatial light modulator, thus allowing real time reconfiguration of the element.
© 2008 Optical Society of America
OSA Recommended Articles
Multifocus microscopy with precise color multi-phase diffractive optics applied in functional neuronal imaging
Sara Abrahamsson, Rob Ilic, Jan Wisniewski, Brian Mehl, Liya Yu, Lei Chen, Marcelo Davanco, Laura Oudjedi, Jean-Bernard Fiche, Bassam Hajj, Xin Jin, Joan Pulupa, Christine Cho, Mustafa Mir, Mohamed El Beheiry, Xavier Darzacq, Marcelo Nollmann, Maxime Dahan, Carl Wu, Timothée Lionnet, J. Alexander Liddle, and Cornelia I. Bargmann
Biomed. Opt. Express 7(3) 855-869 (2016)
Equations on this page are rendered with MathJax. Learn more.