Optical absorption spectrometry system including dichroic beam combiner and splitter

• Main Authors: HAMMER, MICHAEL RON, BOLLES, MICHAEL
• Format: Patent
• Language: English
• Published: 27.05.2015
• Subjects: COLORIMETRY; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; PHYSICS; RADIATION PYROMETRY; TESTING

An optical absorption spectrometry system including a dichroic beam combiner and a splitter is disclosed. The optical absorption spectrometry system (100, 400) includes first and second light sources, a dichroic beam combiner and a wavelength selective module. The first light source (111, 411) emits first light (113, 413) having first wavelengths within a first wavelength range, and the second light source (112, 412) emits second light (114, 414) having second wavelengths within a second wavelength range different from the first wavelength range. The dichroic beam combiner (115, 415) includes a predetermined first reflectance/transmission transition region, the dichroic beam combiner being configured to transmit a first portion of the first light and to reflect a second portion of the second light to provide combined light (116, 416a). The wavelength selective module (120, 420) is configured to disperse the combined light received at an entrance aperture (121, 421), to select a sample wavelength range of the dispersed light as sample light (123, 423), and to output the sample light having the selected sample wavelength range from an exit aperture (122, 422) for illuminating a sample.