rl.bhat said:
The main issue with using a simple glass lens is that it can cause chromatic aberration, which is when different colors of light are refracted at different angles, resulting in blurry or distorted images.
Chromatic aberration affects white light by causing it to separate into its component colors, resulting in a rainbow-like effect around the edges of objects in the image.
Yes, chromatic aberration can be corrected by using multiple lenses with different refractive indices, such as achromatic or apochromatic lenses. These lenses are designed to minimize the separation of colors and produce a clearer image.
Another issue with using a simple glass lens is spherical aberration, which occurs when light rays passing through the edges of the lens are refracted differently than those passing through the center, resulting in blurring or distortion of the image.
Spherical aberration can be addressed by using aspherical lenses, which are designed to minimize the differences in refraction between the center and edges of the lens. Additionally, using a combination of lenses can also help reduce spherical aberration.