Figure shows a beam expander made with two coaxial converging lenses of focal lengths f1 and f2
Question:
Figure shows a beam expander made with two coaxial converging lenses of focal lengths f1 and f2 and separation d = f1 + f2. The device can expand a laser beam while keeping the light rays in the beam parallel to the central axis through the lenses. Suppose a uniform laser beam of width Wi =2.5 mm and intensity Ii = 9.0 kW/m2 enters a beam expander for which f1 = 12.5 cm and f2 = 30.0 cm. What are?
(a) Wf and
(b) If of the beam leaving the expander?
(c) What value of d ts needed for the beam expander if lens I is replaced with a diverging lens of focal length f1 = ?? 26.0cm?
Fantastic news! We've Found the answer you've been seeking!
Step by Step Answer:
Related Book For
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
Question Posted: