Abstract: The invention relates to a method for assembling two or more mirror plate stacks into a rigid unit in turn comprising a plurality of mirror plates and a base plate onto which the plurality of mirror plates are stacked. To improve assembly accuracy of the mirror plates, a base plate is provided with a first mirror plate mounted thereto, a handling tool is provided with a second mirror plate and a spacer is provided to a first surface of the second mirror plate and positioned to align the second mirror plate with the first mirror plate. This alignment is based on a measured position and shape of the first mirror plate to compensate for a deviation from a pre-defined position and shape. The plates are then attached to each other with the spacer; the handling tool is removed and the position and shape of the second mirror plate is measured.

Abstract: The invention relates to a method for assembling a mirror plate stack 30 comprising a plurality of mirror plates 10 and a base plate 13 onto which the plurality of mirror plates are stacked. Additionally, the invention relates to a method for assembling two or more mirror plate stacks into a rigid unit.

Abstract: The invention provides an optical reflector element (1) for a beam of X-rays (RX) or of gamma-rays or of high-energy particles at grazing incidence, the element being constituted by a stack of superposed silicon plates (10-12). Each plate (10-12) has a reflecting top face (101-121) possibly coated with a metallic film, a multilayer or a dispersive grating and a bottom face carrying ribs (100-120) forming spacers between two successive plates (10-11, 11-12), and defining determined spacing between two successive reflecting faces (101-121). The invention also provides optical instruments comprising several such elements, in particular a type I Wolter telescope comprising two mirrors in tandem having respective paraboloid and hyperboloid surfaces of revolution or a conical approximation thereof or a Kirkpatrick-Beaz system.

Abstract: The invention provides an optical reflector element (1) for a beam of X-rays (Rx) or of gamma-rays or of high-energy particles at grazing incidence, the element being constituted by a stack of superposed silicon plates (10-12). Each plate (10-12) has a reflecting top face (101-121) possibly coated with a metallic film, a multilayer or a dispersive grating and a bottom face carrying ribs (100-120) forming spacers between two successive plates (10-11, 11-12), and defining determined spacing between two successive reflecting faces (101-121).