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Gradient-index (GRIN) optics is the branch of optics covering optical effects produced by a gradient of the refractive index of a material. Such gradual variation can be used to produce lenses with flat surfaces, or lenses that do not have the …

May 13, 2024 · Thorlabs' gradient-index (GRIN) lenses are available for imaging applications in which the region of interest is inaccessible with a microscope objective. These GRIN lens can be implanted deeply into a target specimen with minimal invasiveness and load.

Generalized GRIN: what is the ray path through arbitrary n(r)? Let’s take a break from optics ... The Hamiltonian formulation is a set of dierential equations describing the trajec-tories of particles that are subject to a potential (force.) The trajectory is described in terms of the particle position q(t) and momentum p(t).

There are three basic GRIN media: axial, radial, and spherical. This has to do with the distribution of the refractive index inside the media. Of course, more complex GRIN media involve mixture of those distributions.

An alternative operation principle is that of a gradient index lens (GRIN lens), where the thickness is usually constant, while the refractive index varies in the radial direction. It is also possible (but not common) to combine both operation principles, …

Gradient Index (GRIN) Rod Lenses feature plane optical surfaces and achieve focus via a continuous change of the refractive index within the lens material.

new polymer GRIN optics include single lenses inspired by cephalopod (octopus) eyes and a three-lens, wide field of view, optical system for a surveillance sensor.

Sep 19, 2019 · We show how birefringence in the GRIN cascades can generate vector vortex beams and foci, and how it can be used advantageously to improve axial resolution.

Jun 15, 2015 · IR-GRIN optical elements designed with simultaneous optical power and chromatic correction can reduce the number of elements in wideband systems, making multi-band IR imaging practical for platforms including small UAVs and soldier handheld, helmet or weapon mounted cameras.

Topics: Geometrical aberrations (cont.): astigmatism, field curvature, distortion; optical design demo; GRadient INdex (GRIN) optics: quadratic and axial profile; introduction to the Hamiltonian formulation. Instructors: George Barbastathis, Colin Sheppard