Electrically tunable gradient-index lenses via nematic liquid crystals with a method of spatially extended phase distribution.
Sign Up to like & getrecommendations! Published in 2019 at "Optics express"
DOI: 10.1364/oe.27.032398
Abstract: The dilemma between tunable range of a lens power and an aperture size in gradient-index (GRIN) type of liquid crystal (LC) lenses is well known due to the limitation of birefringence of LC martials and… read more here.
Keywords: electrically tunable; grin lens; liquid; via nematic ... See more keywords
Detecting spatial chirp signals by Luneburg lens based transformation medium.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.453937
Abstract: Gradient refractive index (GRIN) lens-based chirp signal chirpiness detection usually relies on the fractional Fourier transform (FRFT) functionality of a quadratic GRIN lens and is limited by paraxial conditions. In this paper, a non-FRFT mechanism-based… read more here.
Keywords: optics; lens based; chirp; grin lens ... See more keywords
Design of a confocal dispersion objective lens based on the GRIN lens.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.473451
Abstract: Spectral confocal technology utilizes the principle of dispersion to establish the precise coding relationship between spatial position and wavelength in the axial focal point. The axial dispersion produced by the dispersion lens will affect the… read more here.
Keywords: dispersion; grin lens; dispersion objective; objective lens ... See more keywords
Mechanically loaded GRIN lens for endoscopy.
Sign Up to like & getrecommendations! Published in 2023 at "Optics express"
DOI: 10.1364/oe.485554
Abstract: Endoscopic techniques are broadly used in medicine. Small diameter endoscopes are either made as fiber bundles or, beneficially, as graded index lenses. Fiber bundles can withstand a mechanical load during their use but the GRIN… read more here.
Keywords: mechanically loaded; grin; lens endoscopy; loaded grin ... See more keywords
High Refractive Index GRIN Lens for IR Optics
Sign Up to like & getrecommendations! Published in 2023 at "Materials"
DOI: 10.3390/ma16072566
Abstract: Infrared gradient refractive index (GRIN) material lenses have attracted much attention due to their continuously varying refractive index as a function of spatial coordinates in the medium. Herein, a glass accumulation thermal diffusion method was… read more here.
Keywords: index; high refractive; index grin; optics ... See more keywords