초록 ▼

An apparatus for near infrared quantitative analysis with an infrared emitting diode (IRED) source utilizes narrow bandpass filters and silicon detectors to provide highly accurate and inexpensive measurement. A narrow bandpass filter in the light path of the IRED passes wavelengths outside the half

An apparatus for near infrared quantitative analysis with an infrared emitting diode (IRED) source utilizes narrow bandpass filters and silicon detectors to provide highly accurate and inexpensive measurement. A narrow bandpass filter in the light path of the IRED passes wavelengths outside the half power bandwidth points of the IRED. A silicon detector together with a sensitive amplifier is used to accurately measure linearly up to six decades of light sensitivity at desired wavelengths.

대표청구항 ▼

An apparatus for near infrared quantitative analysis comprising: a plurality of pulsed infrared emitting diodes (IREDs) of specific one-half power bandwidth; means for providing pulses to control the on off status of the IREDs; a highly sensitive infrared detector positioned to receive infrared ener

An apparatus for near infrared quantitative analysis comprising: a plurality of pulsed infrared emitting diodes (IREDs) of specific one-half power bandwidth; means for providing pulses to control the on off status of the IREDs; a highly sensitive infrared detector positioned to receive infrared energy reflected or transmitted through a sample; a plurality of stationary bandpass filters each selected to allow passage of a preselected wavelength band through it, which selected band is outside the one-half power bandwidth of the IRED, each of the said bandpass filters positioned between each of the said IREDs and the infrared detector; means for preforming the said quantitative analysis based on the energy received by said infrared detector.