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AssigneeDe La Rue International Limited
InventorsHansjorg Klock, Robert Jones, Michael Stuart Hazell
Estimating the term…
An optical detection device for validating bank rates has several input apertures, an imaging device (12), a diffraction grating (15.1, 15.2, 15.3) associated with each input aperture (11.1, 11.2, 11.3) and a detection array (17). The diffraction grating (15.1, 15.2, 15.3) is rotated at angle of e.g. 45 degrees relative to the orientation of the linear detection array (17). This arrangement enables the spectra of multiple points to be measured simultaneously. The angle of rotation, the pitch of the apertures (11.1, 11.2, 11.3) and a pitch of the diffraction grating (15.1, 15.2, 15,3) are selected in such a way that the spectra of sad multiple points are contiguously mapped onto the detection array (17) has a single linear array of color sensitive detection pixels. The acxis of the linear array is offset with respect to an optical axis (7) of the optical detection device.
Optical detection device in particular for spectroscopic measurements comprising at least one input aperture, an imaging device, at least one diffraction grating associated with the at least one input aperture and a linear detection array, characterized in that the grating lines of the diffraction grating (15.1, 15.2, 15.3) extend at an acute angle relative to the longitudinal axis of the linear detection array (17).
Device for validating bank notes comprising;
Method for the spectral analysis of an area of detection of an object, comprising the steps of:
Dependencies are inferred from the claim text.