Spectrometer and method for analyzing a light sample using a spectrometer

Patent metadata

Field	Value
Publication number	US-11366014-B2
Application number	US-201916589371-A
Country	US
Kind code	B2
Filing date	Oct 1, 2019
Priority date	Oct 2, 2018
Publication date	Jun 21, 2022
Grant date	Jun 21, 2022

Abstract

A spectrometer including at least one light-coupling element, a variable entrance slit, a dispersive element, a detector element and a control and evaluation unit. The object of providing a spectrometer having improved measuring characteristics is achieved in that the variable entrance slit is implemented by a first spatial modulation element including a plurality of pixels, wherein the individual pixels can be arranged independently of one another by the control and evaluation unit, wherein the individual pixels are arranged in order to implement the entrance slit during operation in such a manner that at least part of the light incident from the light-coupling element is passed on to the dispersive element.

First claim

What is claimed is:

1. A spectrometer for analyzing a light sample comprising:
at least one light-coupling element;
a variable entrance slit;
a dispersive element for separating the light samples into its spectral components;
a detector element; and
a control and evaluation unit comprising a controller and an analyzer for determining a spectrum of the light sample,
wherein the variable entrance slit is located before the dispersive element and is implemented by a first spatial modulation element comprising a plurality of individual pixels which are independently arrangeable relative to one another by the control and evaluation unit, and
wherein the individual pixels are arranged in order to implement the entrance slit during operation in such a manner that at least part of the light incident from the light-coupling element is passed from the variable entrance slit on to the dispersive element so that the entrance slit has a width that is variable depending on a measurement situation occurring during operation.

2. The spectrometer according to claim 1 , wherein the first spatial modulation element is configured as a first micro-mirror array, and wherein the plurality of pixels are implemented by a plurality of micro-mirrors.

3. The spectrometer according to claim 1 , wherein the at least one light-coupling element is designed as an optical waveguide or as an optical waveguide bundle.

4. The spectrometer according to claim 1 , wherein the first spatial modulation element is located on the optical path in front of the dispersive element and, furthermore, between the dispersive element and the detector element, the pixels are arranged in a first partial region of the first spatial modulation element that, during operation, the light incident from the light-coupling element is at least partially transmitted to the dispersive element, and that the pixels are arranged in a second partial region of the first spatial modulation element that, during operation, the spectral components of the light sample to be examined are sequentially directed onto the detector element.

5. The spectrometer according to claim 1 , characterized in that a second spatial modulation element comprising a plurality of pixels is provided, wherein each pixel can be separately arranged by the control and evaluation unit, wherein the second spatial modulation element is arranged on the optical path between the dispersive element and the detector element, wherein the control and evaluation unit deflects the plurality of pixels of the second spatial modulation element during operation such that the spectral components of the light sample to be examined are sequentially deflected onto the detector element.

6. The spectrometer according to claim 1 , wherein the detector element is configured as an individual detector.

Assignees

• Krohne Messtechnik Gmbh

Inventors

• Fritsch Thomas

Classifications

• G01J3/04

  Slit arrangements {slit adjustment} · CPC title

• G01J3/0218 Primary

  using optical fibers · CPC title

• G01J3/10

  Arrangements of light sources specially adapted for spectrometry or colorimetry · CPC title

• G01J3/0237

  Adjustable, e.g. focussing · CPC title

• G01J3/502 Primary

  using a dispersive element, e.g. grating, prism · CPC title