Using phase-corrected Bessel beams to cut glass substrates with a chamfered edge.

Ultrafast laser cutting of a glass substrate at an oblique angle is demonstrated using a phase-corrected Bessel beam. Simulations are used to predetermine the ideal phase of the incident Bessel beam such that an unaberrated Bessel beam is formed inside the tilted substrate. Additional corrections to the beam such as shortening, moving the intensity of the beam within the substrate, and the formation of an elliptical focal spot were necessary to ensure consistent chamfering of the substrate and are discussed herein.

Nonmechanical zoom system through pressure-controlled tunable fluidic lenses.

We have developed a variable-power zoom system that incorporates fluidic lenses and has no moving parts. The designed system applies two single-chamber plano-convex fluid singlets, each with their own distinct design, as well as a conventional refractive lens. In this paper, we combine the two fluid elements to form a variable-power telescope, while the fixed lens enables image formation.

Adjustable hybrid diffractive/refractive achromatic lens.

We demonstrate a variable focal length achromatic lens that consists of a flat liquid crystal diffractive lens and a pressure-controlled fluidic refractive lens. The diffractive lens is composed of a flat binary Fresnel zone structure and a thin liquid crystal layer, producing high efficiency and millisecond switching times while applying a low ac voltage input. The focusing power of the diffractive lens is adjusted by electrically modifying the sub-zones and re-establishing phase wrapping points.