Optical absorption spectrometry system including dichroic beam combiner and splitter

An optical absorption spectrometry system, comprising:

• a wavelength selective module configured to disperse light received at an entrance aperture, to select a sample wavelength range of the dispersed light as sample light, and to output the sample light having the selected sample wavelength range from an exit aperture;
• a sample holder configured to contain a sample that provides measurement light when illuminated by the sample light from the wavelength selective module;
• and
• a detection module configured to detect the measurement light, the detection module comprising a plurality of photodetectors configured to detect corresponding light having wavelengths within different wavelength ranges, and a dichroic beam splitter configured to transmit portions of the measurement light having wavelengths within a first range of wavelengths to one of the plurality of photodetectors and to reflect portions of the measurement light having wavelengths within a second range of wavelengths to another one of the plurality of photodetectors, the first and second ranges of wavelengths being defined by a predetermined first reflectance/transmission transition region of the dichroic beam splitter.

An optical absorption spectrometry system, comprising:

• a first light source configured to emit first light having first wavelengths within a first wavelength range;
• a second light source configured to emit second light having second wavelengths within a second wavelength range different from the first wavelength range;
• a third light source configured to emit third light having third wavelengths within a third wavelength range different from the first wavelength range and the second wavelength range;
• a first dichroic beam combiner configured to transmit a portion of the first light and to reflect a portion of the second light to provide first combined light;
• a second dichroic beam combiner configured to transmit a portion of the first combined light and to reflect a portion of the third light to provide second combined light;
• and
• a wavelength selective module configured to disperse the second combined light received at an entrance aperture, to select a sample wavelength range of the dispersed light as sample light, and to output the sample light having the selected sample wavelength range from an exit aperture for illuminating a sample.