Date:  July 23rd, 2002
Author: David E. Sproles

Problem:
    Given fixed input and output angles of light rays, determine a method of rotation for a diffraction grating (of known parameters and specified orientation) such that the output point recieves only one wavelenth, specified by the orientation of the grating and this output wavelength varies linearly with an adjustment via this method of rotation.  (simplified monochrometer setup capable of executing a Littrow configuration calculation as well as other configurations.)
    This document is designed to answer general as well as project specific questions.  The specific project is increasing the tuning precision of a dye-laser using two diffraction gratings to select for wavelength.  Extant and proposed mounting-schemes are developed. The mathematica file that generated this html is located here (~8.9 MB)

Note: This document assumes an understanding of diffraction and a rudimentary understanding of diffraction gratings.

Also:  The following package must be loaded in order to execute error-fitting sections.  The second and third lines are to get rid of  "spellling error" messages.

[Graphics:Images/index_gr_1.gif]

Resolution requirements on rotation method

Construction of grating configuration and related equations in a monochrometer

Fitting data to linear variation of θ across a large range (λ=700nm, Δλ = ±400nm) using existing monochrometer specifications

Fitting data to linear variation of θ across a small range (Δλ = ±30nm) using dye-laser grating specs

Enter the Sine-Bar...

Current Melles Griot mounts for gratings (do we already have a sinebar?)

Implementation of an actual Sine-Bar for us...

Random calculations (extras)


Converted by Mathematica      July 23, 2002