Patent ID: 7098469
Filing Date: 2006-08-29
Classification: G01J,G01N

Abstract:
1. A light source for detecting forensic residues at a site that are not detectable under ambient lighting, said light source comprising: a thin walled housing member having an interior space including a frontal opening and a rear base; a rechargeable battery operatively removably mounted on said rear base; a handle member selectively removably attached to either a top surface or a bottom surface of said housing member; a source of white light mounted in said frontal opening; means including switch means carried on said housing member for electrically connecting said source to said battery; a reflector member surrounding said source for receiving illumination from said source and projecting reflected illumination forwardly; a cylindrical housing assembly including a frontal lens connected with said housing member at said frontal opening for receiving said reflected illumination from said reflector member and forwardly projecting illumination in a shallow angle beam; a transverse slot formed in said housing assembly and intersecting said reflected illumination; a first slide member slidable in said slot between a plurality of detented positions, said slide member having a first set of a plurality of wavelength filters for selectively illuminating certain of said forensic residues wherein one of said filters is interposed in said reflected illumination in one of said selected positions; an air inlet opening in said housing assembly immediately behind said slide member; an outlet opening in said housing member adjacent said base; and fan means in said housing member adjacent said outlet opening, said fan means being effective for drawing air through said inlet opening across said slide member and over said light source for maintaining cooling of said housing interior and said filters during operation.