Multiplexed lenses written onto a liquid crystal display for depth of focus increasing

In this work we propose different types of combination of several diffractive lenses written onto a single programmable liquid crystal display (LCD) in order to increase the depth of focus (DOF) of the imaging system. Each lens is designed in such a way that lenses with consecutive focal lengths pro...

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Detalles Bibliográficos
Autores principales: Campos, J., López-Coronado, O., Iemmi, C., Escalera, J.C., Gimeno, R., Yzuel, M.J.
Formato: CONF
Materias:
Diffractive optics
Lens design
Liquid-crystal devices
Spatial light modulators
Image processing
Lenses
Light modulation
Multiplexing
Optical transfer function
Depth of focus (DOF)
Liquid crystal devices
Random multiplexing
Liquid crystal displays
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0277786X_v6311_n_p_Campos
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:In this work we propose different types of combination of several diffractive lenses written onto a single programmable liquid crystal display (LCD) in order to increase the depth of focus (DOF) of the imaging system. Each lens is designed in such a way that lenses with consecutive focal lengths provide amplitude distributions along the axis that overlap. The lenses are spatially multiplexed onto the LCD following different schemes: by sectors, by rings and randomly. We compare experimentally the Point Spread Function (PSF) in transversal planes along the optical axis with a single lens and with the designed multiplexed lenses. The intensity profiles are also compared. The random multiplexing is the combination technique that brings the best results in terms of DOF.

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