Boots – shoes – and leggings
Patent
1991-12-09
1993-10-12
Black, Thomas G.
Boots, shoes, and leggings
36457102, 356345, 356319, G01J 3453
Patent
active
052531830
ABSTRACT:
A device according to the present invention includes an interferometer which produces interference fringes from light received from a light source. The interference fringes are imaged onto a photo-diode array which transforms the imaged interference fringes into a single set of electric signals. The single set of electric signals is digitized and stored as a group of consecutive data points which represent an interferogram signal containing a DC component. The data points are processed to obtain moving average values representing the DC component of the interferogram signal. The moving average values are subtracted from the data points to obtain a clean interferogram signal which is Fourier-transformed to obtain a spectrogram of the light source.
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T. H. Barnes; "Photodiode array Fourier transform spectrometer with improved dynamic range"; Applied Optics vol. 24, No. 22, Nov. 15, 1985.
Inoue Masaru
Matsui Shigeru
Black Thomas G.
Hitachi , Ltd.
Zanelli Michael
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