Abstract: The present invention relates to an apparatus for detecting tumorous tissue comprising at least one excitation light source 12, which first excitation light source 12 emits a first excitation light 34 of a wavelength of between 300 nm and 314 nm and includes at least one optical fiber 14 for guiding the first excitation light 34 to an object field 18 of the tissue 16 to be examined, and at least one lens 24 for projecting an auto-fluorescence signal and/or a remission signal 20 of the tissue 16, generated by the first excitation light 34, to a CCD or ICCD chip of a camera 22, as well as a data processing system 28 for processing the signals transmitted by the camera 22, said lens 24 being capable of processing UV light and being designed such that at least two images 48, 50 from different spectral regions of the fluorescent object field 18 are generated and projected to the CCD or ICCD chip, of which at least one image 48, 50 represents the UV range and another, different wavelength range of the auto-fluoresc

Abstract: A gas laser and a dedusting unit thereof are provided. The gas laser comprises a tube containing a gas mixture including a laser gas and preferably a buffer gas. The tube preferably comprises a cylindrical inner wall. A discharge unit is inserted into the tube and has two elongated electrodes defining an electrical gas discharge gap therebetween for providing an electric gas discharge between said electrodes to generate laser light. A circulation means is included in the tube for generating a gas flow within the tube that passes through the discharge gap. A dedusting unit is mounted along the inner cylindrical wall of the tube in such a manner that only a bypass flow which is a part of the gas flow within the tube passes through the dedusting unit.

Abstract: An adjustable mounting unit for an optical element of a gas laser is provided. The typical gas laser for which the mounting unit will be used comprises a tube having a first end wall at one end and a second end wall at the other end, an optical axis extending longitudinally through the tube, and a port in the first end wall through which the optical axis passes. The mounting unit includes a rigid support structure having an aperture therein and an optical element mounted within the aperture. In addition, at least three adjustable mounting devices are used to attach the support structure to the laser tube. The mounting points are preferably selected so that they are displaced in an axial direction by substantially the same amount due to dimensional changes in the laser occurring during operation of the laser. When attached to the laser, the rigid support is spaced apart from the laser tube to allow for the adjustment of the angular positioning of the optical element.

Abstract: The present invention relates to an apparatus for detecting tumorous tissue comprising at least one excitation light source 12, which first excitation light source 12 emits a first excitation light 34 of a wavelength of between 300 nm and 314 nm and includes at least one optical fiber 14 for guiding said first excitation light 34 to an object field 18 of the tissue 16 to be examined, and at least one lens 24 for projecting an auto-fluorescence signal and/or a remission signal 20 of said tissue 16, generated by means of said first excitation light 34, to a CCD or ICCD chip of a camera 22, as well as a data processing system 28 for processing the signals transmitted by said camera 22, said lens 24 being capable of processing UV light and being designed such that at least two images 48, 50 from different spectral regions of said fluorescent object field 18 are generated and projected to the CCD or ICCD chip, of which at least one image 48, 50 represents the UV range and another, different wavelength range of sai