Blitzy89
- 11
- 0
Hello. I've been struggling with this problem for some time, and honestly I do not know how to solve it.
Two positive lenses are to be used as a laser beam expander. An axial 1.0 mm diameter beam enters the short focal length positive lens, which is followed by a somewhat longer focal length positive lens, from which it emerges with a diameter of 8.0 mm. Given that the first lens has a 50.0 mm focal length, determine the focal length of the second lens and the separation between the lenses
I suppose that yi=1.0mm; yf=8.00mm;f1=50.0mm
Focal length of system = f
1/f = 1/f1 + 1/f2
Magnification of image Mt=(yf/yi) (per lens)
I tried to solve this by combining the two lenses as a system, but I can't find an answer that makes sense.
Any help is greatly appreciated.
Thank you
Homework Statement
Two positive lenses are to be used as a laser beam expander. An axial 1.0 mm diameter beam enters the short focal length positive lens, which is followed by a somewhat longer focal length positive lens, from which it emerges with a diameter of 8.0 mm. Given that the first lens has a 50.0 mm focal length, determine the focal length of the second lens and the separation between the lenses
I suppose that yi=1.0mm; yf=8.00mm;f1=50.0mm
Homework Equations
Focal length of system = f
1/f = 1/f1 + 1/f2
Magnification of image Mt=(yf/yi) (per lens)
The Attempt at a Solution
I tried to solve this by combining the two lenses as a system, but I can't find an answer that makes sense.
Any help is greatly appreciated.
Thank you