Patent ID: 9658103
Date: 2017-05-23
CPC Classifications: G01J

Claim:
1. A measuring apparatus for measuring optical properties of a medium, comprising: at least a first light source and a second light source for transmitting light, wherein said first light source and said second light source have the same emission spectrum, and said first light source and/or said second light source transmit(s) broadbandly; one single light receiver for receiving light at least of a first received wavelength and a second received wavelength; and at least one dispersing element for bending and/or refracting light, wherein: the light transmitted by the light sources directly strikes said dispersing element and is so turned by said dispersing element that it passes the medium and then strikes said light receiver; said first light source is arranged at a first angle relative to said dispersing element and said second light source at a second angle relative to said dispersing element; said second angle differs from said first angle; said first angle is so embodied that the wavelength of the light turned by said dispersing element corresponds to the first received wavelength and said first angle is selected such that only light of the first received wavelength arrives at the receiver, wherein remaining wavelengths are bent, refracted, scattered or reflected by said dispersing element in other directions; and said second angle is so embodied that the wavelength of the light turned by said dispersing element corresponds to the second received wavelength and said second angle is selected such that only light of the second received wavelength arrives at the receiver, wherein remaining wavelengths are bent, refracted, scattered or reflected by said dispersing element in other directions.