avantes

International Application Overview

  • International Application Number: PCT/NL2024/050037

  • International Publication Number: WO 2024/158289 A1

  • Publication Date: 02 August 2024

  • Filing Date: 29 January 2024

  • Applicant: AVANTES B.V., Apeldoorn, Netherlands

  • Inventors: Peter Edwin Sportel, Alexander Leonardus Lambertus Broekhof, Kenny Efraim van Norden, Ronald Roerdink, Tetyana Vitaliyivne Tolpekin

  • Agent: Lisa Claire Lucie Imbernon, Arnold & Siedsma, The Hague

Patent Classifications

  • International Patent Classification (IPC): G01J 3/02, G01J 3/04, G01J 3/18, G01J 3/28

  • Designated States for national protection: Includes various countries across Europe, Asia, and more.

Title and Abstract

  • Title: Spectrometer with Adjustable Sensitivity

  • Abstract: Describes an optical spectrometer designed to analyze optical signals, featuring a movable optical aperture device that allows for adjustments in spectral sensitivity without altering resolution.

Key Technical Features

  • Optical Aperture Device: Receives and selects a portion of the input optical signal, generating a secondary optical signal that varies based on its positioning relative to an optical element.

  • Functionality: The spectrometer adjusts the surface area of the second optical signal impinging on an optical element to modify sensitivity levels easily.

Applications of Spectroscopy

  • Used extensively for analyzing electromagnetic signals across various ranges: ultraviolet (UV), visible (VIS), near-infrared (NIR), and infrared (IR).

  • Common applications include:

    • Color measurements

    • Concentration determination of chemical components

    • Electromagnetic radiation analyses

Operational Insights

  • Throughput Limitations: Typically constrained by the input slit or detector pixel size. Effective optical system design requires matching the etendue of the light source with optical receivers.

  • Spectral Resolution: Determined by the input slit, diffraction grating, and detector. These components together define how many spectral peaks can be resolved.

  • Sensitivity Measurement: Defined by light sensitivity, which indicates how much light is needed to produce a detectable signal, and how this varies over the wavelength spectrum.

Invention Objectives

  • Provide improved spectrometers where spectral sensitivity can be adjusted independently of resolution, allowing for a homogeneous adjustment across the spectral range.

Calibration Method for the Spectrometer

  • Steps include:

    1. Measuring the spectral response of the spectrometer.

    2. Adjusting the aperture device to match a reference spectral response iteratively until the desired sensitivity is achieved.

    3. Fix the aperture device in position once calibration is complete.

Conclusion

  • The invention pertains to optical spectrometer technology that facilitates enhanced analysis accuracy through adjustable sensitivity parameters, providing flexibility and performance optimization in diverse applications.