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Machine translation
1. (WO1981001464) METHOD AND APPARATUS FOR OBTAINING DERIVATIVES OF PHOTOMETRIC SIGNALS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/001464    International Application No.:    PCT/AU1980/000092
Publication Date: 28.05.1981 International Filing Date: 19.11.1980
IPC:
G01N 21/27 (2006.01), G06J 1/00 (2006.01), H03H 17/04 (2006.01)
Applicants:
Inventors:
Priority Data:
1387/79 19.11.1979 AU
Title (EN) METHOD AND APPARATUS FOR OBTAINING DERIVATIVES OF PHOTOMETRIC SIGNALS
(FR) PROCEDE ET DISPOSITIF POUR OBTENIR DES DERIVEES DE SIGNAUX PHOTOMETRIQUES
Abstract: front page image
(EN)Method and apparatus for obtaining derivatives of photometric signals in spectroscopy wherein an analogue signal characteristic of a sample (12) is converted to a digital signal which is differentiated using an approximation algorithm in a non-recursive digital filter (18) operating at predetermined differentiating intervals. The derivative is then low pass filtered in a recursive digital filter (23) at filtering intervals shorter than the differentiating intervals to reconstruct an interpolated derivative.
(FR)Procede et dispositif pour obtenir des derivees de signaux photometriques en spectroscopie ou un signal analogique caracteristique d"un echantillon (12) est converti en un signal digital qui est differencie grace a un algorithme d"approximation dans un filtre digital non recurrent (18) fonctionnant a des intervalles predetermines de differentiation. La derivee est ensuite filtree a travers un filtre passe bas dans un filtre recurrent digital (23) a des intervalles de filtrage plus courts que les intervalles de differentiation de maniere a reconstruire une derivee interpolee.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)