NAS-21
CH4 (Methane) (C6H11NO)n (Poly(N-isopropylacrylamide), PNIPAM)
PS - Polystyren
So what does this mean? Features 100% UV protection.
(C2ClF3)n (Polychlorotrifluoroethylene, PCTFE)
C2H3N (Acetonitrile)
1.59 INDEX LENS Made with premium polycarbonate. C4H9OH (Butanol) LIQUIDS
C5H11OH (Pentanol, amyl alcohol) C3H6(OH)2 (Propylene glycol) (C2H6OSi)n (Polydimethylsiloxane, PDMS) Other people search for polycarbonate high index because they need polycarbonate, but they think that “polycarbonate” and “polycarbonate high index” are synonymous. (C6H10O5)n (Cellulose)
C2H6 (Ethane) Your email address will not be published. (C3H4O2)n (Polylactic acid, PLA)
As high index lenses have matured, polycarbonate was kicked out of the high index category and moved into a “mid index” category, which is between standard plastic and high index. C4H8OS (Oxathiane)
METALS C6H6 (Benzene) C2H5OH (Ethanol) 2009: n 0.437 … C2H4 (Ethylene) Clear understanding of different lens indexes: All inclusive frames are generally …
Our goal is to provide our customers with affordable, top-of-the-line prescription safety and prescription eyewear. C6H14 (Hexane) C4H10O3S (Diethyl sulfite, DES) CH2Cl2 (Dichloromethane) Sultanova et al. CHBr3 (Bromoform)
Rx-Safety.com is a family-owned and – run optical lab and online store. CH4N2O (Urea) Required fields are marked *. MISCELLANEOUS, Page C8H5KO4 (Potassium hydrogen phthalate, KHP)
Since polycarbonate is 1.58 index, it is considered a “mid index” lens.
Dispersion properties of optical polymers, Acta Physica Polonica A 116, 585-587 (2009) (fit of the experimental data with the Sellmeier dispersion formula: Mikhail Polyanskiy), [Expressions for n] CCl4 (Carbon tetrachloride)
Generally, the index number ranges from 1.50 to 1.74 where 1.74 index is considered to be the thinnest lens. OTHER - miscellaneous materials High index lenses have a refractive index.
C7H17O3P (Diisopropyl methylphosphonate, DIMP)
C8H18 (Octane) In general, we recommend high index over polycarbonate for its longevity, thinness, and lightness.
PLASTICS
Hopefully, this removes some of the confusion while you’re shopping for eyeglasses and comparing lens materials. Polycarbonate high index lenses are a bit of a paradox.
Refractive index [ i ] n = 1.5848 Wavelength, µm n, k 0.5 0.6 0.7 0.8 0.9 1 1.56 1.57 1.58 1.59 1.6 1.61 1.62 RefractiveIndex.INFO PLASTICS PC - Polycarbonate Durable and impact-resistant.-4.25 to -6.75 or +4.25 to +6.75-2.25 to -3.00 or +2.25 to +3.00 [CSV - comma separated] The refractive index of polycarbonate is about 1.58, but most optical professionals nowadays consider 1.60 to be the lowest refractive index that can be called “high index”.
C3H9O3P (Dimethyl methylphosphonate, DMMP) (C16H14O3)n (Polycarbonate, PC) [TXT - tab separated]
CRYSTALS Refractive index [ i ] n = 1.4906 Wavelength, µm n, k 0.5 0.6 0.7 0.8 0.9 1 1.48 1.485 1.49 1.495 1.5 1.505 RefractiveIndex.INFO (C5H8O2)n (Poly (methyl methacrylate), PMMA) Sultanova et al. C9H8O (Cinnamaldehyde) Save my name, email, and website in this browser for the next time I comment.
C3H7OH (Propanol) The refractive index of current spectacle lens materials ranges from 1.498 (CR-39 plastic) to 1.74 (a specific variety of high-index plastic). CHCl3 (Chloroform) MAIN - simple inorganic materials C2H4O2 (Acetic acid)
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3D - selected data for 3D artists, Book Zhang et al.
C9H10O3 (Ethyl salicylate) 3D - selected data for 3D artists, Book
PMMA - Poly(methyl methacrylate) CH3OH (Methanol) The straight answer is no, but the long answer is: they used to. ORGANIC - organic materials Optorez1330 (C8H8)n (Polystyrene, PS) C6H12 (Cyclohexane) 2020: n,k 0.4-20 µm, N. Sultanova, S. Kasarova and I. Nikolov. So for the same prescription power and lens design, a … Refractive index [ i ] n = 1.5848 Wavelength, µm n, k 0.5 0.6 0.7 0.8 0.9 1 1.56 1.57 1.58 1.59 1.6 1.61 1.62 RefractiveIndex.INFO (C16H14O3)n (Polycarbonate, PC) Sultanova et al.
Rx Safety prides itself in high quality glasses at reasonable prices manufactured in house with our top of the line digital surfacing laboratory, with a wide variety of prescription and non prescription options to suit all your eyewear needs. (C6H12)n (Polymethylpentene, PMP)
OTHER - miscellaneous materials
C6H3Cl3 (Trichlorobenzene, TCB) (C37H24O6N2)n (Polyetherimide, PEI), Page PC - Polycarbonate
C4H8O2 (Ethyl acetate, EtOAc, EA) High index lenses have a refractive index (ability to bend light) of 1.60 or higher.
Polycarbonate lenses have an index of refraction of 1.59, and will generally be about 20% thinner than standard plastic lenses. C11H12O2 (Ethyl cinnamate)
C4H8O2 (Dioxane) C8H8 (Styrene)
ZeonexE48R, N. Sultanova, S. Kasarova and I. Nikolov. 2009: n 0.437-1.05 µm (C2H4)n (Polyethylene, PE, HDPE)
C7H8 (Toluene)
Dispersion properties of optical polymers, Acta Physica Polonica A 116, 585-587 (2009) (fit of the experimental data with the Sellmeier dispersion formula: Mikhail Polyanskiy), [Expressions for n] It’s still pretty common for people to search around for a high index polycarbonate lens, and the most common reason is that they’re actually looking for a high index plastic lens. C7H16 (Heptane)
C2H4(OH)2 (Ethylene glycol) Although rounded to 1.00 refractive index, it still has a value greater than 1.00. Do polycarbonate high index lenses exist? C3H6O (Acetone) 2009: n 0.437-1.05 µm
Polycarbonate lenses also provide you with protection from 100% … Your email address will not be published. MAIN - simple inorganic materials C6H5NO2 (Nitrobenzene)
[Full database record], RefractiveIndex.INFO website: © 2008-2020 Mikhail Polyanskiy, refractiveindex.info database: public domain via CC0 1.0, NO GUARANTEE OF ACCURACY - Use on your own risk. (C5H8O2)n (Poly(methyl methacrylate), PMMA) Shelf The perturbations in the atmosphere are a result of the refractive index not being exactly 1.00 and different pockets of heat … (C10H8O4)n (Polyethylene terephthalate, PET) C8H19NO (Diisopropylaminoethanol, DIPA)
(C2H4O)n (Polyvinyl alcohol, PVA) [TXT - tab separated] GLASS - glasses C8H8O3 (Methyl salicylate) Standard plastic lenses are around … Shelf C12H14O4 (Diethyl phthalate, DEP)
(C2H3Cl)n (Polyvinyl chloride, PVC) Cellulose PVP - Polyvinylpyrrolidone (C6H9NO)n (Polyvinylpyrrolidone, PVP) C2H6OS (Dimethyl sulfoxide, DMSO)
C5H12 (Pentane)
C5H12O2 (Pentanediol)
GLASS - glasses C3H5(OH)3 (Glycerol)
ORGANIC - organic materials [Full database record], RefractiveIndex.INFO website: © 2008-2020 Mikhail Polyanskiy, refractiveindex.info database: public domain via CC0 1.0, NO GUARANTEE OF ACCURACY - Use on your own risk. C2H2 (Acetylene)
GLASS [CSV - comma separated]
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