ECE 460 Fall 2008
http://light.ece.uiuc.edu/ECE460/
Homework 7
Due in class on Tuesday Oct 28, 2008
1. Problem 2.5-4 in text
2. Problem 2.5-5
3. Problem 2.5-6
4. A bright field microscope (NA=0.65 objective, 100X total magnification) is used to image a
square profile amplitude grating of period d, i.e. the transmission t(x)=0 or 1, for the white
and dark regions, respectively.
The illumination is a plane wave beam from a HeNe laser of 0.6 microns wavelength. The
microscope can be modeled by 2 lenses, as shown in Section 4.1. of the notes.
a. What is the resolution of the microscope?
b. Describe and sketch the field at the Fourier plane of the objective and the image plane
of the microscope, as d varies from 100 microns to 100 nanometers.
d