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Optical systems for analyzing media

An optical system and medium technology, applied in the field of optical systems, can solve problems such as inability to be guaranteed

Active Publication Date: 2019-11-12
ENDRESSHAUSER CONDUCTA GMBHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This cannot be guaranteed due to component tolerances and tolerances in the assembly process and requires subsequent calibration

Method used

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  • Optical systems for analyzing media

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Experimental program
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Embodiment Construction

[0019] figure 1 A simplified diagram of the optical system 1 is shown. The optical system 1 comprises a light source 3 designed as an LED for emitting a light beam 4 and a first diaphragm 6 for limiting the light beam 4 of the light source 3 . The lens 7 produces the imaging of the first diaphragm 6 , wherein the second diaphragm 8 delimits the light beam 4 of the lens. The light beam traverses the medium 2 and reaches the receiver 5 . The optical system produces an image of the first aperture 6 on the receiver 5 by means of the lens 7 .

[0020] The optical system 1 is dimensioned in such a way that the diameter of the second aperture 8 corresponds to the image size of the first aperture 6 on the receiver 5 . Via the diameter of the first diaphragm 6 and the selected image scale, the diameter of the beam bundle at the end of the measuring path can be determined. The light beam 4 is thus limited by the diameter of the image of the first diaphragm 6 on the receiver 5 and th...

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Abstract

The invention relates to an optical system for analyzing a medium. The optical system (1) includes a light source (3) which is intended for transmitting a light beam (4) which penetrates the medium (2), a receiver (5) for receiving the light beam (4), at least one diaphragm (6) which is intended for limiting the light beam (4) of the light source (3), at least one lens (7) which is intended for projecting the at least one diaphragm (6) to the receiver (5), and at least one second diaphragm (8) which is disposed between the at least one lens (7) and the medium (2).

Description

technical field [0001] The invention relates to an optical system for analyzing media. Background technique [0002] For the analysis of media, especially liquids, in process measurement technology, automatic analyzers are often used. The determination of the measured variable is often carried out in the facility by means of optical, for example photometric or spectroscopic measurements. [0003] Light-emitting diodes are widely used light sources for optical measurements. If the measuring path is relatively long, a defined bundle of rays from the light beam is required. The simplest solution is ray bundling from parallel beams. However, here a different problem arises. On the one hand, in the case of small diameters of the beam bundle, as it usually occurs in automatic analyzers, it can be seen as a disturbance that the light source is not a perfect point light source. Light-emitting diodes contain, for example, LED chips with a limited extent. Therefore, LEDs cannot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25
CPCG01N21/255G01N2201/062G01N2201/063G01J3/0229G01J3/42
Inventor 拉尔夫·伯恩哈特
Owner ENDRESSHAUSER CONDUCTA GMBHCO