US 6,982,789 B1 | ||
Monochromator system and applications thereof | ||
Duane E. Meyer, Lincoln, Nebr. (US) | ||
Assigned to J.A. Woollam Co. Inc., Lincoln, Nebr. (US) | ||
Filed on Aug. 08, 2003, as Appl. No. 10/637,051. | ||
Application 10/637051 is a continuation in part of application No. 09/531877, filed on Mar. 21, 2000, granted, now 6,535,286. | ||
Claims priority of provisional application 60/431489, filed on Dec. 06, 2002. | ||
Int. Cl. G01J 3/12 (2006.01) |
U.S. Cl. 356—331 | 7 Claims |
1. A monochromator system for selecting a small range of wavelengths in a polychromatic beam of electromagnetic radiation,
which monochromator system functionally sequentially comprises within in a substantially enclosed space containing enclosing
means having vertical, longitudinal and lateral dimensions:
source means for providing of a beam of electromagnetic radiation;
first slit providing means;
first mirror;
first stage comprising a plurality of gratings, each of which can be rotated into a functional position;
second mirror providing element;
second slit providing means;
third mirror;
second stage comprising a plurality of gratings, each of which can be rotated into a functional position;
fourth mirror;
order sorting filter means;
pin hole providing means;
and further comprises beam chopper means after said source means for providing of a beam of electromagnetic radiation;
said source means for providing a beam of electromagnetic radiation comprising both Xenon and Deuterium Lamps and source selecting
mirror and motion imparting means for selecting therebetween;
said second mirror being laterally present between said first mirror and said second stage which comprises a plurality of
gratings, and said third mirror being laterally positioned between said first stage which comprises a plurality of gratings
and said fourth mirror,
said first mirror and second mirror and said second stage comprising a plurality of gratings as a group being longitudinally
removed from said first stage which comprises a plurality of gratings and said third mirror and said fourth mirror;
there being first electromagnetic radiation blocking baffle means positioned between said source means for providing of a
beam of electromagnetic radiation and said first stage comprising a plurality of gratings;
there being second electromagnetic radiation blocking baffle means positioned between said second mirror providing element
and said second stage comprising a plurality of gratings;
there being third electromagnetic radiation blocking baffle means positioned between said third mirror providing element and
said first stage comprising a plurality of gratings;
there being fourth electromagnetic radiation blocking baffle means positioned between said first and second mirrors;
there being fifth electromagnetic radiation blocking baffle means positioned between said third and fourth mirrors;
there being sixth electromagnetic radiation blocking baffle means positioned between said second stage comprising a plurality
of gratings and said pin hole providing means;
such that in use a beam of electromagnetic radiation provided by said source means for providing of a beam of electromagnetic
radiation is:
caused to pass through said first slit;
reflect from said first mirror;
interact with one of said plurality of gratings on said first stage which is rotated into a functional position;
reflect from said second mirror;
pass through said second slit;
reflect from said third mirror;
interact with one of said plurality of gratings on said second stage which is rotated into a functional position;
reflect from said fourth mirror, proceed through order sorting filtering means;
said beam of electromagnetic radiation further being chopped by said chopping means;
with monochromator selected wavelengths being caused to exit through said pinhole;
the improvements being that:
said Deuterium lamp is mounted on a stage which enables three dimensional X-Y-Z positioning motion controlled from outside
said enclosing means;
said beam chopping means, source selecting mirror and motion imparting means, first slit providing means, first stage comprising
a plurality of gratings and associated rotation imparting means, second slit providing means, second stage comprising a plurality
of gratings and associated rotation imparting means, all have electrical plug-in/socket means;
and a mother printed circuit board which provides traces which in use carry electrical energy to said source selecting mirror
motion imparting means, said first slit providing means, said first stage comprising a plurality of gratings and associated
rotation imparting means, said second slit providing means, said second stage comprising a plurality of gratings and associated
rotation imparting means; conductive traces on said mother printed circuit board providing access at a socket means which
is extended outside said substantially enclosed space defining enclosing means.
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