Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1987-02-27
1989-07-25
Willis, Davis L.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01B 902
Patent
active
048507091
ABSTRACT:
Fabri-Perot spectroscopy method comprises a step of directing a light beam at a first refraction angle to a first Fabri-Perot interference plate and a step of directing a light beam transmitted through the first Fabri-Perot interference plate to a second Fabri-Perot interference plate at a second refraction angle, and Fabri-Perot spectroscopy apparatus comprises Fabri-Perot interference plates, a control device for changing a spacing between the Fabri-Perot interference plates, a first optical device for directing a light beam to the first Fabri-Perot interference plate at a first refraction angle, a second optical device for directing the light beam transmitted through the Fabri-Perot interference plate at a second refraction angle different from the first refraction angle to the second Fabri-Perot interference plate, and a seal for externally sealing the Fabri-Perot interference plates. Gas for protecting the Fabri-Perot interference plates is filled in the sealed space.
REFERENCES:
patent: 3967211 (1976-06-01), Itzkan et al.
patent: 4076422 (1978-02-01), Kohno
patent: 4525067 (1985-06-01), Hernandez
Rees, et al., "A Stable Rugged, Capacitance-Stabilized Piezoelectric Scanned Fabry-Perot Etalon", J. Phys. E.: Sci. Instru., vol. 14, No. 11, pp. 320-325, 11/81.
L. N. Durvasula et al., Pressure Scanned Three-Pass Fabry-Perot Interferometer, Applied Optics, vol. 17, No. 20, Oct. 15, 1978, pp. 3298-3303.
D. Rees et al., Stable and Rugged Etalona for the Dynamics Explorer Fabry-Perot Interferometer . . . , Applied Optics, vol. 21, No. 21, Nov. 1, 1982, pp. 3896-3912.
J. G. Winter, Servocontrol of a Fabry-Perot Interferometer, J. Phys. E.: Sci. Instrum, vol. 18, 1985, pp. 505-509.
Ban Mikichi
Hara Kazuhiko
Kakuchi Osamu
Ohtsuka Masaru
Shiba Osamu
Canon Kabushiki Kaisha
Koren Matthew W.
Willis Davis L.
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