A grating with lines per millimetre sits in the front focal plane of a lens of focal…
PHYSICS · Multi-part · Fermi University Physics · Optics & Photonics · Fourier optics and image formation · Fourier optics and image formation
What an Instrument Can See, Ch The lens as a Fourier transformer
Problem
A grating with ν0=80 lines per millimetre sits in the front focal plane of a lens of focal length f=200mm. The illumination is a plane wave of vacuum wavelength λ=532nm.
((a)) Find the spacing between adjacent diffraction orders in the back focal plane.
((b)) Find the distance from the axis of the n=+3 order.