Abstract: A metallic hollow structural part, whose inner geometry is matched to at least one metallic insert supported thereat and pre-profiled to the finished condition, which is secured at the hollow structural part under predetermined heat influence, especially a turbine blade with a cooling insert. The insert is made of memory material and upon exceeding a predetermined temperature threshold value, abuts without play at the inner geometry. The hollow structural part and the insert can be fixedly connected with each other metallurgically or in the way of the "memory effect".

Abstract: An optical examining apparatus, particularly an isochromatic multiplier, with two optical elements, particularly partly light-transmitting mirrors arranged at a distance and at a definite angle to one another which enclose an object-receiving space, whereby the object is to be inserted between the two mirrors at a definite distance and/or in a defined angular position; an object carrier is thereby mounted at the edge or enclosure of at least one of the optical elements, which is provided with receiving and holding surfaces and fastening means for the object and which is adjustable in the angular position of the receiving and holding surfaces with respect to the plane of one and/or the other optical element; the object carrier thereby projects with its receiving surfaces and fastening means between the two optical elements.