Recent progress in variafocal liquid crystal diffractive lens

Xabier Quintana Arregui; Javier Pereiro-García; Olga Blanco Fernández; Byron Ganazhapa; Morten A. Geday; José Manuel Otón Sánchez; Manuel Caño García

doi:10.1117/12.3022341

18 June 2024 Recent progress in variafocal liquid crystal diffractive lens

Xabier Quintana Arregui, Javier Pereiro-García, Olga Blanco Fernández, Byron Ganazhapa, Morten A. Geday, José Manuel Otón Sánchez, Manuel Caño García

Author Affiliations +

Proceedings Volume PC13016, Liquid Crystals Optics and Photonic Devices; PC130160K (2024) https://doi.org/10.1117/12.3022341
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

In this talk, we’ll discuss our latest findings on cascaded spiral diffractive lenses (cSDL) based on liquid crystal (LC) technology. Our lenses are notable for their low voltage requirements (less than 10Vrms), direct addressing capabilities, and wide aperture (greater than 25mm OD). They also boast high fill factors (over 98%) and a broad tunable focal range (over 4 Diopters). Each of the two cascaded devices are standard LC cells, created using a single direct laser writing lithographical process on a conventional transparent ITO covered glass substrate. We’ll also share our recent work with dual frequency materials and the application of these lenses in zoom systems and dynamic achromatic image capture, highlighting our progress in reducing the haze often present in diffractive liquid crystal lenses, and other high resolution devices. We’ll showcase implementations with both 24 and 72 electrodes, which allow for quasi analogue tuning across the entire tuning range. Keywords: Liquid Crystal, flat lens, adaptive optics, diffractive optics, optical vortex, orbital angular momentum

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Xabier Quintana Arregui, Javier Pereiro-García, Olga Blanco Fernández, Byron Ganazhapa, Morten A. Geday, José Manuel Otón Sánchez, and Manuel Caño García "Recent progress in variafocal liquid crystal diffractive lens", Proc. SPIE PC13016, Liquid Crystals Optics and Photonic Devices, PC130160K (18 June 2024); https://doi.org/10.1117/12.3022341

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KEYWORDS

Liquid crystals

Lenses

Adaptive optics

Image resolution

Laser frequency

Laser processing

Multiphoton lithography

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