Eta Sa Manufacture Horlogere Suisse

Asulab S.a.

Csem Centre Suisse D'electronique Et De Microtechnique Sa&#x2014;recherche Et D&#xe9;veloppement

Toralf Scharf

Pierre-André Meister

Lionel Paratte

Fabien Blondeau

André Zanetta

Wilfried Noell

Roland Bitterli

Joachim Grupp

Rolf Klappert

Christophe Ballif

Hans Peter Herzig

Peter Kipfer

Jordi Escarre

Christian Bohley

In the present invention a new solar photovoltaic module is proposed comprising: a silicon based photovoltaic element; an intermediate layer deposited on said photovoltaic element to the incident light side; an interference filter deposited on the incident light side of said intermediate layer; a front element disposed on the incident light side of said interference filter. Said intermediate layer has a transparency of at least 90% for infrared light between 780 nm and 1200 nm and said interference filter is corrugated and composed of a multilayer comprising a plurality of dielectric layers designed to transmit at least 75% of the total incident solar infrared light between 780 nm and 1200 nm, and to reflect and diffuse incident visible solar light such that the perceived color of said reflected and diffused visible light by any observer positioned anywhere to the incident light side of said solar photovoltaic module and looking towards the front element of said solar photovoltaic module is defined by a Y10 tristimulus value not lower than 50 defined by an x value of 0.20 to 0.45 and a y value of 0.20 to 0.45 in a chromaticity diagram of a CIE 1964 Yxy color system using a white light source measured with a D65 light source with a 10-degree angular field.

Solar photovoltaic module

Assembly element () made in a plate of brittle material, including an aperture () provided for the axial insertion of an arbour (). The inner wall () of the aperture () includes elastic structures (), which are etched into the plate and which each include at least one support surface () for gripping the arbour () radially in order to secure the assembly element () relative to the arbour (). The assembly element () includes a first series (S) of elastic structures () etched in a top layer () of the plate and a second series (S) of elastic structures () etched in a bottom layer () of the plate. A timepiece may be fitted with this assembly element.

Assembly element including two series of elastic structures and timepiece fitted with the same

Assembly element made in a plate of brittle material, such as silicon, in particular for a timepiece, including an aperture provided for the axial insertion of an arbour, the inner wall of the aperture including elastic structures which are etched into the plate and which each include at least one support surface for gripping the arbour radially in order to secure the assembly element relative to the arbour. Each elastic structure is formed by a fork which is connected to the inner wall of the aperture by a bridge of material and which includes two branches extending, on either side of the bridge of material, generally towards the arbour. Each branch includes a support surface in proximity to the free end thereof. The invention also proposes a timepiece fitted with an assembly element of this type.

Assembly element including fork shaped elastic structures and timepiece including the same

Assembly element () made in a plate of brittle material, including an aperture () provided for the axial insertion of an arbour (), the inner wall () of the aperture () including elastic structures (), which are etched into the plate to grip the arbour () radially. Each elastic structure () includes a first rectilinear elastic strip (L) which extends along a tangential direction relative to the arbour (). According to the invention, each elastic structure () is formed by a radial stack of several parallel elastic strips.

Assembly element including two superposed strip shaped elastic structures and timepiece fitted with the same

An optical device ( ) is provided using at least one film ( ) of cholesteric liquid crystal to reflect at least one predetermined wavelength band from an incident light. This device is characterized in that a non zero birefringence gradient is present in a portion or the entire thickness of said film. The gradient may be obtained in particular by superposing layers ( ) having increasing or decreasing respective birefringence coefficients. The birefringence gradient has the effect of removing the lateral bands of the reflection spectrum, hence making the color of the reflected light more brilliant and more saturated. The effect is particularly advantageous in the case of the color red, for which the lateral band located on the yellow side is perceived strongly by the human eye.

Bragg reflection optical device and methods for the manufacturing thereof

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Neuchâtel, Switzerland

Toralf Scharf