Spectrometer
Abstract
Abstract AN F/1 SPECTROMETER HAS ENTRANCE AND EXIT SLITS, EACH TEN MILLIMETERS HIGH AND FIFTY MICRONS WIDE, WHICH ARE PARALLEL TO ONE ANOTHER AND SPACED THREE MILLIMETERS APART. A PARABOLIC COLLIMATING MIRROR OF THIRTY CENTIMETERS FOCAL LENGTH REFLECTS LIGHT FROM THE ENTRANCE SLIT ONTO A DISPENSING MOSAIC OF NINE GRATINGS EACH RUILED WITH 1200 GROOVES PER MILLIMETER. THE GRATINGS ARE MOUNTED ON THREE PARALLEL AXES AND A DRIVE LINKAGE ROTATES ALL THE GRATINGS SIMULTANEOUSLY THROUGH EQUAL ANGLES. THE MIDDLE GRATING HAS AN APERTURE THROUGH WHICH LIGHT PASSES BETWEEN THE ENTRANCE AND EXIT SLITS AND THE COLLIMATING MIRROR. BEHIND THE EXIT SLIT IS MOUNTED AN ELLIPTICAL REFLECTOR THAT HAS FOCAL POINTS SPACED FIFTY EIGHT MILLIMETERS APART ALONG AN AXIS AT AN ANGLE OF 34* 40'' TO THE PLANE OF THE ENTRANCE-EXIT SLIT OPTICS FOR CONCENTRATING LIGHT PASSING THROUGH THE EXIT SLIT ON A PHOTOMULTIPLIER.
Inventors
- 👤 Richard Keith Brehm
- 👤 Charly Dany Allemand
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |