Abstract: In a method for manufacturing a blazed grating from a prefabricated initial blazed grating, a blazed grating the substrate of a first material of which has a surface, which has an initial surface profile having an initial blaze angle, is provided. An auxiliary layer of a second material is applied onto the surface of the substrate, wherein the second material is different from the first material. The auxiliary layer is removed at least partially by means of etching, wherein the etching is carried out at least until the etching simultaneously acts on the auxiliary layer and on the initial surface profile of the substrate. A ratio between an etching rate for the auxiliary layer and an etching rate for the substrate is adjusted such that the initial blaze angle is reduced to a final blaze angle. Further, a blazed grating manufactured in that way and an optical device having such a blazed grating, are described.

Abstract: There is provided a grating apparatus for filtering wavelengths ?100 nm. The grating apparatus includes multiple individual grating elements having grating lines. The individual grating elements are positioned one behind another on a curved support surface in relation to a plane spanned by the grating apparatus in a direction of beans of a light bundle that is incident on the grating apparatus.

Abstract: A method for manufacturing an optical element having at least one surface with an optically effective structure, from a substrate, is described, wherein the substrate is provided, an auxiliary layer is applied onto the substrate, a surface structure is formed on a surface of the auxiliary layer, and the auxiliary layer is ion beam etched such that the surface structure of the auxiliary layer is transferred to the substrate in order to obtain the optically effective structure of the optical element.

Abstract: A Littrow grating (1) comprises a multiplicity of parallel diffraction structures (3) succeeding one another periodically. The latter are arranged on a support (2) defining a base area (4). A diffraction structure (3) comprises a blaze flank (5) inclined towards the base area (4) substantially at the Littrow angle (&dgr;). In addition the diffraction structure (3) comprises a counter-flank (6) which forms with the blaze flank (5) at the apex of a diffraction structure (3) an apex angle (&agr;) which is less than 90°. The counter-flank (6) comprises at least two substantially plane area sections (7, 8). The latter extend, bordering one another and inclined relative to one another through an angle of inclination (&bgr;), parallel with the extension direction of the diffraction structure (3). Due to the inclination of the at least two area sections (7, 8) relative to one another, the counter-flank (6) exhibits all in all a concave surface viewed from the light incidence side.

Abstract: A diffraction grating (1) has a multiplicity of parallel diffraction structures succeeding one another periodically. The latter are arranged on a support (2) and each incorporate a slat (3) extending from a base area (4) of the support (2). Said slat has a substantially rectangular cross-section. The width w of the slat (3) comes to less than 100 nm, preferably between 20 nm and 60 nm, more preferably in the area of 50 nm. Advantageous uses of the diffraction grating (1) are obtained e.g. in a Littrow configuration, preferably in third order of the incident light beams (8), in particular at a light wavelength that is less than 250 nm.

Abstract: A diffraction grating (1) has a multiplicity of parallel diffraction structures succeeding one another periodically. The latter are arranged on a support (2) and each incorporate a slat (3) extending from a base area (4) of the support (2). Said slat has a substantially rectangular cross-section. The width w of the slat (3) comes to less than 100 nm, preferably between 20 nm and 60 nm, more preferably in the area of 50 nm. Advantageous uses of the diffraction grating (1) are obtained e.g. in a Littrow configuration, preferably in third order of the incident light beams (8), in particular at a light wavelength that is less than 250 nm.

Abstract: A Littrow grating (1) comprises a multiplicity of parallel diffraction structures (3) succeeding one another periodically. The latter are arranged on a support (2) defining a base area (4). A diffraction structure (3) comprises a blaze flank (5) inclined towards the base area (4) substantially at the Littrow angle (5). In addition the diffraction structure (3) comprises a counter-flank (6) which forms with the blaze flank (5) at the apex of a diffraction structure (3) an apex angle (&agr;) which is less than 90°. The counter-flank (6) comprises at least two substantially plane area sections (7, 8). The latter extend, bordering one another and inclined relative to one another through an angle of inclination (&bgr;), parallel with the extension direction of the diffraction structure (3). Due to the inclination of the at least two area sections (7, 8) relative to one another, the counter-flank (6) exhibits all in all a concave surface viewed from the light incidence side.

Abstract: A conveyor belt tool for repairing a broken conveyor belt which has sliding clamps to match the tool size to the belt width and thickness.