What is the approximate index of refraction and abbe value for Trivex lenses?

What is the approximate index of refraction and abbe value for Trivex lenses?

• A. n=1.523, abbe=58.9
• B. n=1.498, abbe=58
• C. n=1.586, abbe=30
• D. n=1.53, abbe=44

Answer: (D)

Trivex lenses combine a moderate refractive index with a mid-range Abbe value. The index of refraction tells you how much light is bent when entering the lens material, and for Trivex it’s about 1.53. The Abbe value reflects dispersion—how much different wavelengths spread out as they pass through the material (lower Abbe means more chromatic aberration). Trivex is known to have an Abbe around 44, which is better than the low-Abbe of polycarbonate but lower than CR-39’s high dispersion. So the pairing of n ≈ 1.53 with Abbe ≈ 44 matches Trivex, while the other options align with other materials (for example, CR-39 around 1.498 with Abbe ~58; polycarbonate around 1.586 with Abbe ~30; crown glass near 1.523 with Abbe ~59).

Trivex lenses combine a moderate refractive index with a mid-range Abbe value. The index of refraction tells you how much light is bent when entering the lens material, and for Trivex it’s about 1.53. The Abbe value reflects dispersion—how much different wavelengths spread out as they pass through the material (lower Abbe means more chromatic aberration). Trivex is known to have an Abbe around 44, which is better than the low-Abbe of polycarbonate but lower than CR-39’s high dispersion.

So the pairing of n ≈ 1.53 with Abbe ≈ 44 matches Trivex, while the other options align with other materials (for example, CR-39 around 1.498 with Abbe ~58; polycarbonate around 1.586 with Abbe ~30; crown glass near 1.523 with Abbe ~59).