In the lateral chromatic aberration formula CA = (dD)/v, what does the variable d denote?

In the lateral chromatic aberration formula CA = (dD)/v, what does the variable d denote?

• A. Distance from the optical center
• B. Power of the lens
• C. Abbe value
• D. CA value

Answer: (A)

The main idea here is that lateral chromatic aberration depends on how far you are from the optic axis. Different wavelengths are dispersed by the lens, causing a lateral shift that grows as you move away from the center of the lens. In the formula CA = (dD)/v, the variable d represents the distance from the optical center (the lens center). As you measure color displacement farther from the center (larger d), the lateral chromatic aberration increases. The other factors, D and v, scale or translate that displacement, but they do not identify the positional variable itself. If you’re right at the center (d = 0), there’s essentially no lateral color shift.

The main idea here is that lateral chromatic aberration depends on how far you are from the optic axis. Different wavelengths are dispersed by the lens, causing a lateral shift that grows as you move away from the center of the lens.

In the formula CA = (dD)/v, the variable d represents the distance from the optical center (the lens center). As you measure color displacement farther from the center (larger d), the lateral chromatic aberration increases. The other factors, D and v, scale or translate that displacement, but they do not identify the positional variable itself. If you’re right at the center (d = 0), there’s essentially no lateral color shift.