Abstract: A holding device for an optical element in an objective has a mount that is connected to the objective, on the one hand, and at least indirectly to the optical element, on the other hand. Arranged between the mount and the optical element is a reinforcing element whose coefficient of thermal expansion corresponds substantially to the coefficient of thermal expansion of the optical element.

Abstract: A holding device for an optical element in an objective has a mount that is connected to the objective, on the one hand, and at least indirectly to the optical element, on the other hand. Arranged between the mount and the optical element is a reinforcing element whose coefficient of thermal expansion corresponds substantially to the coefficient of thermal expansion of the optical element.

Abstract: A process for producing a reflection-reducing interference layer system is provided, in which a stack of layers is formed by applying to a surface of a substrate several layers which have alternately a high refractive index and a low refractive index, and a nanoporous final layer is applied to the stack of layers by vapour deposition of the material of the final layer at an oblique angle relative to the normal of the top layer of the stack of layers such that the refractive index of the final layer is lower than the refractive index of the top layer of the stack of layers.

Abstract: A method for producing an optical element or part of an optical element having a base body, including:—providing a mold body (21, 1000, 2000) which has a surface corresponding to the geometry of the optical element;—depositing a layer system (7) including at least one separation layer system (15, 1010, 2010) on the surface of the mold body (21, 1000, 2000);—electroforming a base body (4, 1030, 2030) on the layer system (7); and—detaching at least the base body from the mold body (21, 1000, 2000) at the separation layer system (15, 1010, 2010).

Abstract: A holding device for an optical element in an objective has a mount that is connected to the objective, on the one hand, and at least indirectly to the optical element, on the other hand. Arranged between the mount and the optical element is a reinforcing element whose coefficient of thermal expansion corresponds substantially to the coefficient of thermal expansion of the optical element.

Abstract: An assembly includes a holder (5), an optical component (1) transmitting radiation in a first region of ultraviolet (UV) radiation adhered to the holder by an adhesive (4), the adhesive being hardenable by radiation of a second region of ultraviolet radiation, a first layer (3) disposed between the optical component and the adhesive, and a second layer (2) for enhancing adhesion between the optical component and the first layer. The first layer is capable of transmitting radiation of the second region of UV radiation and obstructing to a high degree transmission of UV radiation of the first region by at least one of absorption and reflection. The optical component has a transmitting zone and the first layer is located outside of the transmitting zone. The second layer for enhancing adhesion between the optical component and the first layer is disposed between the first layer and the optical component.