Tuesday, 18 November 2014

optics - Cause of Spherical Aberrations


What is the cause of spherical aberrations in lenses? I know that it's due to the differing width of the lens, but I don't understand/know the physics of why the lens width affects the focal distance of the light ray. I've seen a lot of optics before, but presently about all I know is that we posit that lenses obey $$\frac{1}{f} = \frac{1}{O} + \frac{1}{I}\tag{1}$$ where $f$ is the focal distance, $I$ is the image distance, and $O$ is the object distance.


So how do we see that the lens width should have an effect on the focal distance?




No comments:

Post a Comment

Understanding Stagnation point in pitot fluid

What is stagnation point in fluid mechanics. At the open end of the pitot tube the velocity of the fluid becomes zero.But that should result...