- #1
tommyers
- 58
- 0
Hi,
If I have a diverging light source, incident on a biconvex lens used for focusing the beam to a point.
How would one calculate the optimum distance between the lens and the beam source for optimum focusing? May question arises because I would expect the lens to be more efficient at focusing if the diverging beam covered the entire surface area of lens as opposed to a small spot on the lens surface, as would be the case if the source and lens were moved closer together.
Obviously, if the diverging beam spread the entire surface area and more, then optical power would be lost, right?
Any useful equations or links?
Regards,
Tom
If I have a diverging light source, incident on a biconvex lens used for focusing the beam to a point.
How would one calculate the optimum distance between the lens and the beam source for optimum focusing? May question arises because I would expect the lens to be more efficient at focusing if the diverging beam covered the entire surface area of lens as opposed to a small spot on the lens surface, as would be the case if the source and lens were moved closer together.
Obviously, if the diverging beam spread the entire surface area and more, then optical power would be lost, right?
Any useful equations or links?
Regards,
Tom