Ads
related to: eyeglass lenses high indexwarbyparker.com has been visited by 100K+ users in the past month
Search results
Refine eyeglass lenses high index
Results from the WOW.Com Content Network
High-index plastics (thiourethanes) Refractive index (n d): 1.600–1.740; Abbe number (V d): 42–32 (higher indexes generally result in lower Abbe numbers) Density: 1.3–1.5 (g/cm³) UV cutoff: 380–400 nm; High-index plastics allow for thinner lenses.
For lenses (such as eye glasses), a lens made from a high refractive index material will be thinner, and hence lighter, than a conventional lens with a lower refractive index. Such lenses are generally more expensive to manufacture than conventional ones.
CR-39 is about half the weight of glass with an index of refraction only slightly lower than that of crown glass, and its high Abbe number yields low chromatic aberration, altogether making it an advantageous material for eyeglasses and sunglasses. A wide range of colors can be achieved by dyeing of the surface or the bulk of the material.
Vertex distance is the distance between the back surface of a corrective lens, i.e. glasses (spectacles) or contact lenses, and the front of the cornea. Increasing or decreasing the vertex distance changes the optical properties of the system, by moving the focal point forward or backward, effectively changing the power of the lens relative to ...
In optics and lens design, the Abbe number, also known as the V-number or constringence of a transparent material, is an approximate measure of the material's dispersion (change of refractive index versus wavelength), with high values of V indicating low dispersion.
A gradient-index lens with a parabolic variation of refractive index (n) with radial distance (x). The lens focuses light in the same way as a conventional lens. Gradient-index (GRIN) optics is the branch of optics covering optical effects produced by a gradient of the refractive index of a material.
Ad
related to: eyeglass lenses high index