Abstract: The present invention relates to a device for the delivery of products out of fans for forming a shingled product stream. The invention uses at least one endless chain lead around a drive shaft of a fan arrangement. The chain links of the chain are equally spaced from one another. The fan arrangement uses multiple fans disposed on a drive shaft in spaced relation. The invention has at least one endless chain, having chain links with a projection, and which chain is arranged between the fans. The projections of the chain links touch and guide the front edges of printed products in the pockets and, during common movement of the fans and chain, change the position of the products in the pockets of the fans.

Abstract: A thermal detector with a monolithic structure comprises a layer of material sensitive to infrared radiation and an insulating layer constituted by a thermostable polymer that can be deposited as a thin layer and has a microporous structure. This insulating layer enables the thermal decoupling of the sensitive layer from the substrate comprising reading circuits with which the detector is provided. The performance characteristics of currently used monolithic infrared detectors can thus be substantially improved through the notable reduction of the thermal losses in the sensitive layer. This is achieved through the greatly reduced thermal conductivity of the layer of dielectric polymer. Application to infrared imaging devices.

Abstract: A diffusing display screen resulting from the combination of a cell comprising a polymer dispersed liquid crystal material which can be made diffusing, and of a cell comprising an electrochromic material which can be made absorbing and reflecting. Outside the operating mode, the display screen according to the invention has the advantage of being transparent, and thus capable of being fixed onto any surface (window, wall, etc.).

Abstract: The invention relates to the obtaining of a structure generating non-linear electrooptical effects, the effects being due to molecules or inter-molecular groupings possessing a non-linear susceptibility and the orientation of the molecules or groupings being induced by an applied electric field. According to the invention, the orientation of the molecules or inter-molecular groupings (5) is obtained by of a dielectric having a permanent polarisation such as an electret (6).

Abstract: Disclosed is an optical component for applications in integrated optics, including a substrate that supports a stack of three polymer layers: a lower layer deposited on the substrate, a central layer and an upper layer, the lower and upper layers having optical indices smaller than that of the central layer which is electrooptical and designed to convey a light beam, the lower layer or the upper layer possessing zones having indices of different values to create a zone of confinement of the light beam in the central layer.

Abstract: An infrared detector based on pyroelectric material, of the type associated with a reading circuit prepared on a semiconductor substrate, the substrate also supporting conductive blocks designed to transmit the electrical signals generated by the pyroelectric material towards the reading circuit. Each conductive block corresponds to a picture element or pixel, wherein the detector is formed by a layer of pyroelectric material deposited on that side of the semiconductor layer having the conductive blocks. The pyroelectric material has a thermal conductivity of K<1 W/m..degree.K., a counter-electrode covering the layer of pyroelectric material on the side opposite the conductive blocks.

Abstract: In a method of construction of an electrooptical display screen and especially a liquid-crystal screen, a control point of an image element is provided with a coupling element of ferroelectric material between an electrode and a control lead.

Abstract: The invention pertains to organic compounds of the tetrahiafulvalene type made amphiphillic by substitution of the radicals R.sup.1 and R.sup.2 meeting one of the following conditions:R.sup.1 is a hydrophilic group and R.sup.2 is a hydrophobic group,R.sup.1 is a hydrophobic group and R.sup.2 is a hydrophilic group,R.sup.1 is an aromatic group and R.sup.2 is a group having a long carbon-containing chain with a hydrophobic nature and a hydrophilic end.These organic compounds can form Langmuir-Blodgett films which are made anisotropically conductive by doping.

Abstract: A Langmuir-Blodgett film comprises at least one layer of amphiphilic molecules which are of two different types. The first type comprises molecules that are active in nonlinear optics. The second type consists of molecules that are inert or active in nonlinear optics. The mixture of these two types of molecules, in specified proportions, gives a film capable of radiating, perpendicular to the substrate, an optic wave which is a second harmonic with reference to an exciting wave.

Abstract: A piezoelectric transducer including a polarized piezoelectric material film, which also has a reinforcing material incorporated into the mass and which prevents any deformation of the film in certain given directions.The invention also relates to a pressure sensor using such a transducer.This sensor can be used both as a pressure sensor and as a pressure gradient measuring device.