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US 10,520,358 B2Granted
Spectrophotometer and method for carrying out a spectrophotometric measurement
AssigneeMerck Patent GmbH
InventorBernhard Guennewig
Life of this patent
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Abstract
The present invention relates to a spectrophotometer comprising a light source; and a light sensor for measuring the light emitted by the light source and passing through or reflected a sample; and being characterized by an offset generator for applying an offset value to an output of the light sensor. The invention further relates to a method for performing a related spectrophotometric measurement.
Claims13
A spectrophotometer, comprising:
- a light source;
- a light sensor for measuring the light emitted by the light source and passing through or reflected by a sample;
- an analog offset generator for applying an analog offset value to an output signal of the light sensor to reduce a signal amplitude of the output signal, wherein the analog offset generator is connected directly to the light sensor;
- and
- an analog-to-digital converter (ADC) to convert the output signal having the reduced signal amplitude into an output digital signal,
- wherein the analog offset value has an absolute value corresponding to ambient light received from the environment of the spectrophotometer.
3 more elements
A method for carrying out a spectrophotometric measurement by means of a spectrophotometer comprising a light source, a light sensor, and an offset generator, the method comprising:
- an ambient light evaluation step, including measuring the ambient light by means of the light sensor, with the light source being turned off or shaded off;
- an offset generation step, including generating an analog offset value corresponding to the ambient light measured by the light sensor that is inputted directly to the offset generator;
- a measurement step, including measuring the ambient light by means of the light sensor, while the light source is turned on or not shaded off and applying the analog offset value to an output signal of the light sensor that is directly connected to the offset generator thereby reducing a signal amplitude of the output signal;
- and
- a converting step, including converting the output signal having the reduced signal amplitude using an analog-to-digital converter (ADC) to an output digital signal,
- wherein the analog offset value has an absolute value corresponding to the ambient light from measured in the ambient light evaluation step.
3 more elements
Dependencies are inferred from the claim text.