Abstract: A combination laryngoscope and video display for providing images of the area ahead of the laryngoscope to facilitate insertion without damaging the surrounding tissue; the laryngoscope having a detachable blade and a rigid, detachable light and image guide attachment device for providing illuminating light ahead of the blade and for detecting the reflected light.

Abstract: A coupling device for a light and image guiding system that is keyed to prevent incorrect attachment of light and image guides and an interlock that lockingly engages the light and image guides together in an engaged position, the coupling device attached to a portable camera unit that translates optical signals into an electronic format for display.

Abstract: An endoscopic or microscopic apparatus for diagnosis by means of a light-induced reaction in biologic tissue “in vivo” which is created by a photo-amboceptor or by autofluorescence is provided. The inventive apparatus is characterized by the feature that at least one reference wavelength &lgr;r is provided which is longer by up to 2&Dgr;&lgr; at maximum or smaller than the wavelength &lgr;s at the point of intersection.

Abstract: A testing or setting device for a PDD or PDT system or for training on such a system, which includes a lighting system, is provided with a housing in which the PDD or PDT system can be at least partially accommodated. The device is characterized in that a tissue phantom is installed in the housing in such a way that the surface of the tissue phantom can be at least partially lit by the lighting system and observed by the observation system, and that the tissue phantom includes at least one luminescent area. A tissue phantom, appropriate for use in the invention's device, has at least one luminescent area and is characterized by the fact that it has at least one additional area, whose luminescent characteristics differ from those of the first luminescent area.