Fastree3d Sa

Stefan Thomas Keller

Bruno Penlae

Lucio Carrara

Ting Gong

The invention relates to a method of an optimal arrangement in time and space of nmultiple laser emitters and a detector for a remote sensing application, comprising setting a target time unit integration time t; &#x2014;translating said time unit integration time into a reduced time &#x3c4;and its corresponding power increase factor &#x3b7;; &#x2014;repeating for every emitter k of said plurality of nemitters the steps of: &#x2014;waiting for a given offset duration t; &#x2014;activating both the laser emitter k, with a power output corrected by &#x3b7;, and the detector for a duration of &#x3c4;; &#x2014;deactivating said emitter k and detector after duration &#x3c4;; &#x2014;flagging emitter k to be kept off for the subsequent duration t=t&#x2212;&#x3c4;. The invention further relates to a device implementing said method.

Method and device for optimizing the use of multiple emitters and a detector in an active remote sensing application

The invention relates to a method of an optimal arrangement in time of a laser emitter and a detector for a remote sensing application, comprising: &#x2014;setting a target time unit integration time t; &#x2014;translating said time unit integration time into a reduced time &#x3c4;and its corresponding power increase factor &#x3b7;; &#x2014;activating both the laser emitter, with a power output corrected by &#x3b7;, and the detector for a duration of &#x3c4;; &#x2014;deactivating the emitter and detector after duration &#x3c4;; &#x2014;keep emitter and detector off for the subsequent duration t=t&#x2212;&#x3c4;.The invention further relates to a device implementing said method.

Method and device for optimizing the use of emitter and detector in an active remote sensing application

A method for measuring a distance to a target in a multi-user environment, comprising: irradiating the environment by a series of light pulses, wherein this series of light pulses is emitted by a battery of at least two or a single light source device emitting on at least two different wavelengths, the light pulses being emitted at a determined repetition rate and with a determined randomly selected wavelength; collecting pulses reflected or scattered from the environment to at least one detector equipped with a wavelength filter whose pass band corresponds to the selected emitted wavelength; assigning a timestamp at the detection of a pulse by at least one chronometer connected to the detector, said timestamps corresponding to the time of arrival (TOA); determining the statistical distribution of said time of arrivals; determining the distance to the target from said statistical distribution.

Method and device for measuring a distance to a target in a multi-user environment using at least two wavelengths

The invention relates to a remote sensing device comprising a detector with a predefined field of view (FOV); and an emitter emitting pulses of light with an overall divergence angle &#x3b8;in the retinal hazard region which further comprises at least one diffuser wherein the divergence angle after the diffuser is &#x3b8;; and at least one lens configured to transform the light from said diffuser to a determined divergence angle matching the FOV of the detector, or to a virtual image of predefined size appropriate in magnitude given the divergence in order to ensure the most restrictive position regarding eye-safety to be at the same position for pulsed and (quasi-)continuous wave operation; and to emit the transformed light. The invention further discloses a smartphone comprising such a remote sensing device characterized by its improved eye-safety properties for myopic people.

Apparatus for beam shaping the pulsed laser emission of a remote sensing operating at wavelengths in the retinal hazard region

A method for measuring a distance to a target in a multi-user environment by means of at least one sensor, comprising: irradiating the environment by means of a series of radiation pulses, wherein series of radiation pulses are emitted at a determined repetition rate and with a determined random delay; collecting pulses that are reflected or scattered from the environment to at least a detector connected to at least one chronometer; assigning a timestamp at every detected pulse on the detector; subtracting the added delay from every registered timestamp coming from the chronometer, the result corresponding to the time of arrival; determining the statistical distribution of said time of arrival; determining the distance to the target from said statistical distribution.

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Le Mont-sur-Lausanne, Switzerland

Stefan Thomas Keller