Spring 2008
OPTI 523 – Optomechanical Design and Analysis
Problem 3: Vacuum window
Design an optical window to a vacuum chamber.
Requirements:
6 in diameter clear aperture
/4 rms wavefront distortion ( = 633 nm)
1 atm pressure on the outside (10-6 Torr on the inside)
Transmit light from 0.4 – 0.7 µm
Thermal: inside the chamber is 77K
Interface: Mate with a 10” diameter stainless steel flange:
10” ID
12” OD
(10.25” diameter O-ring)
11” diameter bolt circle, 18 bolts, 3/8”
A) Write the requirements for window.
B) Perform preliminary design.
a. Specify the window
b. Sketch the geometry
Show how to estimate performance and survival
C) Complete the design. Provide solution as a technical report.
Problem 3 1