Abstract: A device and method for detecting fluorescent evidence, including fingerprints. The device and method use a pair of matched filters, a source of noncoherent light, and a light intensifier to detect the wavelength-shifted luminescence from fluorescent substances. The light source and a first filter illuminate the substances with a light of predetermined band width. The second filter and the light intensifier detect and increase the luminance of the reflected light, shifted to a longer wavelength by luminescence from the florescent substances. The device may be hand-held and portable. The intensified light image may be displayed locally and/or may be transmitted to a remote receiver and displayed so that evidence may be detected remotely.

Abstract: A device and method for detecting fluorescent evidence, including fingerprints. The device and method use a pair of matched filters, a source of noncoherent light, and a light intensifier to detect the wavelength-shifted reflections from fluorescent substances. The light source and a first filter illuminate the substances with a light of predetermined band width. The second filter and the light intensifier detect and increase the luminance of the reflected light, shifted to a longer wavelength by reflection from the florescent substances. The device may be hand-held and portable.

Abstract: The disclosed apparatus is an electro-optical fingerprint copier.The apparatus uses a camera with one or more lenses to copy the impression made by the ridges on the tips of fingers and thumbs. These impressions are useful as a means for identification since no two persons have the same pattern of ridges.The apparatus also includes an automatic chart feeder, positioning and releaser, an automatic shutter control and lense system to position fingers. The features make possible the processing of an accurate fingerprint chart in a very short time.

Abstract: The disclosed apparatus is an electro-optical fingerprint photocopier to copy fingerprints of a person.This apparatus uses a camera with one or more lenses to photocopy the impression made by the ridges on the tips of the fingers and thumbs. These impressions are useful as means for identification since no two persons have the same ridges pattern.This apparatus also includes an automatic chart feeder, positioning and releaser, an automatic shutter control and concave-convex lenses to position the fingers. The features make possible the processing of an accurate fingerprint chart in a very short time.The apparatus shall be especially used in the identification of persons, in the military, naval, police and immigration services, and in various commercial transactions. Also, shall be used by schools and other learning institutions for the proper identification of students.