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

Bishop Innovation Limited

Csem Centre Suisse D'electronique Et De Microtechnique Sa - Recherche Et Developpment

Csem Centre Suisse D'electronique Et De Microtechnique Sa

Peter Masa

David Hasler

Pascal Heim

Edoardo Franzi

Eric Grenet

Alessandro Mortara

Friedrich Heitger

Christian Piguet

Ross Stanley

Jean-Marc Masgonty

Philippe Vuilleumier

Christiane Gimkiewicz

A position measurement system for determining 2D displacement or position of a mobile element with respect to a reference frame, including: a point light; an optical mask having transparent and opaque areas defining a repetitive pattern on at least one side of its surfaces; an imager, fixed to a mobile element, including integrated electronic circuits allowing detection, computing and analyzing of a shadow projected by the optical mask. The position measurement system includes an optical diffuser plate between the light source and the mask. The imager, mask and diffuser plate form an assembly so as to produce a light spot created by the scattering of the incident light beam emitted by the light source on the diffuser plate. The mask positioned between the diffuser plate and imager, produces a shadow on the imager, allowing to compute and provide 2D position of the mobile element relative to the fixed reference frame.

Positioning device comprising a light beam

A system measures the position of a light source in space using an imager and transparent surface with a pattern on top. The pattern consists of a repetitive pattern and a distinctive element. The system achieves sub-micron precision. It also handles the measurement of several light sources simultaneously, and the measurement of the position of a retroreflector instead of the light.

Measurement system of a light source in space

A method for working out the angular position of a rotating element, by using at least one fixed light source emitting a light beam in the direction of a fixed sensor, arranging the light source with respect to the rotating element and sensor to induce an interaction between the beam and sensor, and providing a value of the angular position dependent of the sensor's output signal. The method including:

Method for working out the eccentricity and the angular position of a rotating element and device for carrying out such a method

Method for working out the angular position of a rotating element, using at least one light source emitting a light beam in the direction of a fixed sensor and computing elements for processing an output signal of the sensor, includes:

Method for working out the angular position of a rotating element and device for carrying out such a method

Method for determining the position and/or displacement of a mobile element with respect to a fixed frame, includes using a fixed light source emitting a light beam, arranging the source with respect to the mobile element and a sensor to induce an interaction between the beam and sensor, using a concave mirror, integral in movement with the mobile element, for reflecting the beam in direction to the sensor, arranging on the path of the beam a fixed optical mask which presents a two dimensional regular pattern interlaced with an absolute code, detecting and processing the image casted by the mask on the sensor, computing the displacement value of the image on the sensor and using the computed displacement value for computing and providing the position and/or the displacement in at least one direction of the mobile element in dependence of the image's displacement.

Measurement system for optical touch trigger or scanning probe with a concave mirror

A one-dimension position measurement system includes: a first ruler having a first one-dimension binary code sapplied thereon, a camera for acquiring a picture of a portion of the code s, the portion having a length of I bits, and some processing elements. Each codeword of length I of the one-dimension code sis unique within the whole code s. A codeword ais read from the acquired picture, and the processing elements are implemented for computing an absolute position p of the codeword aof the code sfrom: (I). An ad-hoc interpolation method is used to obtain a precision way below the distance between two bits of the codewords. The code smay be applied on the ruler by using some geometric primitives, a geometric primitive for encoding a '1' being different from a geometric primitive for encoding a '0', both having the same horizontal projection. The horizontal projection is then used for fine interpolation, achieving nanometer-scale resolution.

One-dimension position encoder

A neural network having layers of neurons divided into sublayers of neurons. The values of target neurons in one layer are calculated from sublayers of source neurons in a second underlying layer. It is therefore always possible to use for this calculation the same group of weights to be multiplied by respective source neurons related thereto and situated in the underlying layer of the neural network.

Method and a system for calculating the values of the neurons of a neural network

An electronic circuit for a capacitive flash analog to digital converter for converting the ratio of first and second analog signals into a digital code representation using an array of parallel capacitive comparator branches. Each branch computing one bit of the digital code simultaneously according to its array index. The first analog signal is applied as a voltage difference between first signal nodes comprising a first positive signal node and a first negative signal node. The second analog signal is, applied as a voltage difference between second signal nodes comprising a second positive signal node and a second negative signal node.

Capacitive flash analog to digital converter

An electronic circuit for measuring the position of a spatially periodic intensity pattern of incident radiation includes an array of detectors ( ); two or more correlator units ( ) each having arrays of capacitors ( ) connected to a buffer ( ); and a phase angle computing unit ( ). The pitch of the array of detectors ( ) is smaller than the pitch of the incident intensity pattern so that the latter is oversampled, yielding high accuracy. The detector outputs ( ) are weighted by respective fixed capacitance values ( ) which vary periodically along arrays of capacitors ( ), and a weighted sum of outputs for each correlator unit ( ) is output at its respective buffer ( ). The capacitance values ( ) of respective correlator units ( ) are mutually offset by a predetermined phase shift. The analog computation using capacitor arrays ( ) is fast and energy efficient, and can be implemented as a VLSI circuit.

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Onnens, Switzerland

Peter Masa