Chromatic aberration is primarily influenced by which property of lens material?

Chromatic aberration is primarily influenced by which property of lens material?

• A. Abbe value
• B. Back vertex power
• C. Refractive index
• D. Surface curvature

Answer: (A)

Chromatic aberration occurs because different wavelengths of light bend by different amounts as they pass through a lens. This wavelength-dependent dispersion is captured by the material’s Abbe value. A higher Abbe value means the material disperses less across the spectrum, reducing chromatic aberration; a lower Abbe value means more dispersion and more chromatic blur. The back vertex power and surface curvature influence where the focal point lies and the shape of the image, but they don’t change how much the material’s refractive power varies with wavelength. The refractive index tells you how much light bends in general, but not how that bending changes with wavelength. So the Abbe value is the property that primarily governs chromatic aberration.

Chromatic aberration occurs because different wavelengths of light bend by different amounts as they pass through a lens. This wavelength-dependent dispersion is captured by the material’s Abbe value. A higher Abbe value means the material disperses less across the spectrum, reducing chromatic aberration; a lower Abbe value means more dispersion and more chromatic blur. The back vertex power and surface curvature influence where the focal point lies and the shape of the image, but they don’t change how much the material’s refractive power varies with wavelength. The refractive index tells you how much light bends in general, but not how that bending changes with wavelength. So the Abbe value is the property that primarily governs chromatic aberration.