Variable width slit mechanism for use in a scanning monochromator
Abstract
Abstract IN A SCANNING MONOCHROMATOR OF THE DIFFRACTION GRATING TYPE, AN IMPROVED SLIT MECHANISM IS PROVIDED ADJACENT THE MONOCHROMATOR ENTRANCE AND EXIST PORTS. EACH SLIT MECHANISM INCLUDES A PAIR OF CLOSELY SPACED PARALLEL SLIT EDGES AND, ADDITIONALLY, INCORPORATES A PARALLELOGRAM ARRANGEMENT. THE PARALLELOGRAM ARRANGEMENT PERMITS THE SLIT EDGES FORMING A SLIT TO BE MOVED RELATIVELY TOWARD AND AWAY FROM ONE ANOTHER TO VARY THE SLIT WIDTH, BUT THE EDGES ARE ALWAYS MAINTAINED IN VERY ACCURATE PARALLELISM. A UNIQUE DRIVE ARRANGEMENT CONNECTS THE INLET PORT SLIT MECHANISM AND THE OUTLET PORT SLIT MECHANISM SO THAT AN INCREASE OR DECREASE IN THE SLIT WIDTH OF ONE CAUSES A CORRESPONDING INCREASE OR DECREASE IN THE SLIT WIDTH OF THE OUTER. A FURTHER UNIQUE DRIVE ARRANGEMENT PERMITS THE DIFFRACTION GRATING TO BE ADJUSTED AT EITHER NORMAL SCANNING SPEED OR AT RAPID SPEED.
Inventors
- 👤 Jack A Haines
Bibliographic Details
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