Abstract: Reflecting device (1) for adjustably reflecting light, such as sunlight, comprising a transparent first wall (3), a transparent second wall (40), which is arranged substantially parallel to and at a distance from the first wall (3), and a regulating layer (7), which is provided with a duct (10), which is bounded between the first wall (3) and the second wall (40), and which regulating layer (7) substantially allows light which impinges on the first wall (3) through to the second wall (40) if the duct (10) is filled with a transparent liquid (9) and reflects light which impinges on the first wall (3) if the duct (10) is empty, the regulating layer (7) being provided with a structure (11) which is prismatic in cross section, characterized in that, the reflecting device is provided with a third wall (41), which is arranged substantially parallel to and at a distance from the second wall (40), and a second regulating layer (7?), which is provided with a second duct (10?), which is bounded between the second wall

Abstract: A device for optically detecting fluid comprises several optical fibres, each of which is provided with a sensor end and an opposite coupling end. Each of the sensor ends is provided with an optical sensor having reflective properties which depend on the concentration of the fluid to be detected at the sensor. The device comprises a light source, a detector and an optical body. The coupling ends of the optical fibres are connected to the optical body at a distance from one another. The light source and the detector are arranged on the optical body in such a manner that light is conducted from the light source through the optical body and is coupled at the coupling ends of the optical fibres and light which is reflected by the optical sensor and which is ejected from the coupling ends of the optical fibres is conducted through the optical body and is received by the detector.

Abstract: A thin film device includes an active layer (4), wherein the active layer has optical properties that change by adding and removing hydrogen, and includes a Mg-transition metal layer, or rare earth based layer, the active layer being provided on one side with a protective layer (3) that is hydrogen, oxygen and water vapor permeable and liquid water impermeable, and has hydrophobic surface properties. The thin film can further include a Pd catalyst layer (5) disposed between the active layer (4) and the protective layer (3). The thin film device can be used in a switchable mirror wherein the optical properties of the mirror can be changed by adding/removing hydrogen to/from the active layer.

Abstract: Reflecting device (1) for adjustably reflecting light, such as sunlight, comprising a transparent first wall (3), a transparent second wall (40), which is arranged substantially parallel to and at a distance from the first wall (3), and a regulating layer (7), which is provided with a duct (10), which is bounded between the first wall (3) and the second wall (40), and which regulating layer (7) substantially allows light which impinges on the first wall (3) through to the second wall (40) if the duct (10) is filled with a transparent liquid (9) and reflects light which impinges on the first wall (3) if the duct (10) is empty, the regulating layer (7) being provided with a structure (11) which is prismatic in cross section, characterized in that, the reflecting device is provided with a third wall (41), which is arranged substantially parallel to and at a distance from the second wall (40), and a second regulating layer (7?), which is provided with a second duct (10?), which is bounded between the second wall

Abstract: A switchable mirror device includes active layer (4) wherein the active layer changes its optical properties by adding/removal of hydrogen and includes a Mg-transition metal layer, or an Y or rare earth based layer the active layer being provided on one side with a further protective layer (3) including a hydrogen and oxygen permeable and water impermeable layer, characterized in that the layer is liquid water impermeable and water vapor permeable and has hydrophobic surface properties. A pd catalyst layer (5) may be disposed between the active layer (4) and the protective layer (3).

Abstract: Optical switching device comprising a substrate on which a magnesium transition metal layer such as a magnesium nickel metal layer is provided. At supplying of hydrogen the magnesium transition metal layer is, starting from the substrate, converted to a magnesium transition metal hydride layer. This has optical properties different from the magnesium transition metal layer. The change in optical properties viewed from the transparent substrate side can change from reflective to transparent wherein a black phase is in between. To obtain and maintain this black phase is relatively critical. However, there are many applications in which such a black phase could be very useful. In order to be able to obtain a stable black phase according to the invention it is proposed to have a relatively thin magnesium metal layer for example of 50 nm at the maximum and to provide an auxiliary layer on top of the magnesium transition metal layer.