Asulab S.a.

Other

Ciba-geigy Corporation

Ams Sensors Singapore Pte. Ltd.

Heptagon Micro Optics Pte. Ltd.

Hans Peter Herzig

Joachim Grupp

Markus Rossi

Moshe Doron

Matthias Gloor

Rolf Klappert

Alireza Yasan

Jean-Charles Poli

Peter Kipfer

Juan Manuel Teijido

Ali Naqavi

Hartmut Rudmann

Steven Mark Barnard

Bassam Hallal

Daniel Pérez Calero

Martin Lukas Balimann

Julien Boucart

Alfredo E Bruno

Toralf Scharf

Hendrik Volkerink

Mai-Lan Elodie Boytard

William B Hugle

Martial Geiser

Beat Krattiger

Philipp Müller

Rene Dandliker

Daniel Infante Gómez

Christian Bohley

Philipp Mueller

Markus Ehrat

Alfredo Emilio Bruno

Daniel Infante Gomez

Philippe Nussbaum

Reinhard Volkel

Daniel Perez Calero

An apparatus for producing structured light comprises a first optical arrangement which comprises a microlens array (L) comprising a multitude of transmissive or reflective microlenses () which are regularly arranged at a lens pitch P and an illumination unit for illuminating the microlens array. The illumination unit comprises an array (S) of light sources () for emitting light of a wavelength L each and having an aperture each, wherein the apertures are located in a common emission plane which is located at a distance D from the microlens array. For the lens pitch P, the distance D and the wavelength L, the following equation applies P=2LD/N, wherein N is an integer with N&#x2265;1. High-contrast high-intensity light patterns can be produced. Devices comprising such apparatuses can be used for depth mapping.

Apparatus for producing patterned illumination using arrays of light sources and lenses

An apparatus for producing structured light comprises a first optical arrangement which comprises a microlens array comprising a multitude of transmissive or reflective microlenses which are regularly arranged at a lens pitch P and an illumination unit for illuminating the microlens array. The illumination unit comprises an array of light sources for emitting light of a wavelength L each and having an aperture each, wherein the apertures are located in a common emission plane which is located at a distance D from the microlens array. For the lens pitch P, the distance D and the wavelength L, the following equation applies=2wherein N is an integer with N&#x2267;1. High-contrast high-intensity light patterns can be produced.

Apparatus for producing patterned illumination including at least one array of light sources and at least one array of microlenses

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

Solid optical guide ( ) with microprisms ( ) of refractive index n, for uniformly illuminating a surface ( ) in grazing incidence at an angle &thgr; in which a plane angle &dgr; of the cross-section develops with respect to the surface ( ) a substantially perpendicular face ( ) and a substantially parallel face ( ), in which microprisms ( ) are structured in hollows, one facet ( ) of said microprisms oriented towards the face ( ) has its edge ( ) formed with the parallel face ( ) inclined at an angle {right arrow over (&agr;)} with respect to the axis of the guide and its edge ( ) formed with the perpendicular face ( ) inclined at an angle {right arrow over (&ggr;)} with respect to the perpendicular to the surface to be illuminated, the values {right arrow over (&agr;)} and {right arrow over (&ggr;)} being determined from characteristics n, &thgr; and &dgr; of the guide.

Device for the oriented illumination of a surface by a microprism guide

Optical detection apparatus for chemical analyses of small volumes of

The invention concerns a liquid crystal display device intended, in particular, to form a colour image display screen, of the type including: a first substrate which is transparent on a front side situated on the side of the viewer; and a second substrate arranged on a back side facing the first substrate and extending parallel to the latter. The first substrate is connected to the second substrate in order to delimit between them a cavity in which at least one film of liquid crystal is arranged. The liquid crystal has at least a first state in which it reflects the light of a range of wavelengths of a predetermined colour and at least a second state in which it is transparent. The surface of each substrate facing the other substrate includes electrodes to allow the liquid crystal to pass at least from the first state to the second state or conversely, by selective application of a control voltage to the electrodes. The liquid crystal display includes a filter absorbing at least the visible neighbouring wavelengths of the range of wavelengths of the predetermined colour and the closest to the wavelength 555 nm with the exception of the wavelengths of said predetermined colour. The filter is arranged on the side of the viewer with respect to the film of liquid crystal.

Liquid crystal display device intended, in particular, to form a color

Illumination device for the dial (4) of a display device formed by a case (1) sealed by a crystal (8) arranged above the dial (4) and held by a fitting ring (9), said device including at least one light source (13, 33, 35, 43, 53) arranged in at least one recess arranged in at least one light guide (20, 30, 40, 50) positioned at the periphery of the dial (4), said guide having a polished internal surface (21) oriented towards the dial (4) and an external surface (22) held in a space delimited by the dial (4), the crystal (8) and the inner wall (10) of the fitting ring (9), characterised in that all or part of said external surface (22) of the guide is arranged to allow a progressive increase along the guide (20, 30, 40, 50) of the quantity of light diffused by said external wall gradually as one moves away from one of the light sources (13, 33, 35, 43, 53).

Uniform illumination device for the dial of a display device

Microlithography techniques have provided a means for the development of many useful devices from microcircuits, which made the computer era possible, to micromechanical devices such as motors that are only a few tens of microns across. A new use of a microdevice is presented here which serves to 'payback' the art of microlithography as it is a significant contribution thereto. The device of the invention is a unique microdevice made with advanced microlithography techniques which when completed can be used as a new exposure tool for microlithography. A lens array can be as thin as 1/40 of the thickness of the page that this text is printed on, yet have thereon an arrangement of optical lenses powerful enough to replace very sophisticated and bulky, million dollar precision optics. An array of lenses can be fabricated with binary optical device and other techniques. The array having unlimited area and field of regard can be used as an exposure tool for very large area microdevices such as flat panel displays without the requirement of step and repeat operations which severely limit the throughput and yield in modern manufacturing methods.

Lens array photolithography

An interferometric apparatus for monitoring changes of the refractive index of An interferometri1capillary tubes comprising a source of coherent light, which is arranged with respect to a capillary tube which is part of a capillary liquid chromatographic system or a capillary electrophoretic system, such that the coherent light beam strikes the capillary tube about perpendicular to its longitudinal extension. In the forward direction of the coherent light beam, behind the capillary tube, the apparatus comprises a photoelectric detector for monitoring a resulting interference fringe pattern and the shifts thereof, which is connected to an evaluation electronics. Between the light source and the capillary tube there is arranged a beam splitting optical element for generating a converging probe beam, which travels along a probe beam axis and strikes the capillary tube at its bore, and a converging reference beam, which travels along a reference beam axis, that extends generally parallel to the probe beam axis and is located in close vicinity to the probe beam axis, and which does not strike the capillary bore.

Interferometric apparatus for monitoring changes of the refractive index

Growing community of inventors

Neuchâtel, Switzerland

Hans Peter Herzig