Ads
related to: high index 1.74 vs 1.67 lenses reviews consumer reportsThe quality of the glasses was outstanding. - Bizrate
- Try The GlassesUSA App
Need your prescription? Get Our App
Live Try-on With The App
- 50% Off Progressive Lens
Best in Class, Custom Made Lenses
Use Coupon Code: PROG50
- Designer Glasses Sale
Ray Ban, Oakley, Gucci, Prada
Save up to 50% Off Lens Upgrades
- Try the Frame Finder Quiz
Personalized Frame recommendations
Find your Perfect Pair in 60 Sec!
- Try The GlassesUSA App
Search results
Results from the WOW.Com Content Network
High-index: 1.60 ≤ n d < 1.74; Very high index: 1.76 ≤ n d; This is a general classification. Often for marketing purposes, materials with n d values that are at or above 1.60 can be referred to as "high-index". Likewise, Trivex and other borderline normal / mid-index materials may be referred to as mid-index.
A typical polymer has a refractive index of 1.30–1.70, but a higher refractive index is often required for specific applications. The refractive index is related to the molar refractivity, structure and weight of the monomer. In general, high molar refractivity and low molar volumes increase the refractive index of the polymer. [1]
In optics and lens design, the Abbe number, also known as the Vd-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 Vd indicating low dispersion.
The refractive index of water at 20 °C for visible light is 1.33. [1] The refractive index of normal ice is 1.31 (from List of refractive indices). In general, an index of refraction is a complex number with real and imaginary parts, where the latter indicates the strength of absorption loss at a particular wavelength. In the visible part of ...