Compact high resolution monochromatic light source for fluid sample concentration measurement
A compact light source for coupling to a movable optic probe may include a light emitting diode (LED), to generate a probe signal at a first bandwidth, an optic coupler, disposed adjacent to the LED, and arranged to couple the probe signal into the movable probe, and a narrow bandpass filter disposed to receive the probe signal at the first bandwidth, and to output the probe signal into the movable probe at a second bandwidth, less than the first bandwidth.
1 . A compact light source for coupling to a movable probe, comprising:
a light emitting diode (LED), to generate a probe signal at a first bandwidth;
an optic coupler, disposed adjacent to the LED, and arranged to couple the probe signal into the movable probe; and
a narrow bandpass filter disposed to receive the probe signal at the first bandwidth, and to output the probe signal into the movable probe at a second bandwidth, less than the first bandwidth,
wherein the LED, the optic coupler, and the narrow bandpass filter form a monochromatic light source.
2 . The compact light source of claim 1 , wherein the first bandwidth is at least 10 nm, and wherein the second bandwidth is less than 1 nm.
3 . The compact light source of claim 1 , further comprising a housing, to contain the LED, the optic coupler, and the narrow bandpass filter.
4 . The compact light source of claim 3 , further comprising a connector to reversibly couple to the movable optic probe.
5 . The compact light source of claim 1 , the probe signal comprising a monochromatic signal characterized by a wavelength in a range of ultraviolet (UV) to infrared (IR) wavelengths, and having a bandwidth of less than 1 nm after exiting the compact light source.
6 . A measurement apparatus, comprising:
a compact light source, comprising a light emitting diode (LED) to generate a probe signal; the compact light source further comprising an optic coupler disposed adjacent to the LED, and a narrow bandpass filter disposed to receive the probe signal at a first bandwidth, and to output the probe signal at a second bandwidth, less than the first bandwidth; and
a measurement instrument, to receive the probe signal, the measurement instrument comprising:
a sample vessel to contain a fluid sample, the sample vessel comprising a vessel wall;
a probe, arranged to direct the probe signal through the sample vessel, wherein the probe is movable along a probe direction with respect to the vessel wall, so as to reduce a path length of the probe signal through the fluid sample; and
a detector, disposed to receive the probe signal after passing through the vessel wall,
wherein the LED, the optic coupler, and the narrow bandpass filter form a monochromatic light source.
7 . The measurement apparatus of claim 6 , wherein the second bandwidth is less than 1 nm.
8 . The measurement apparatus of claim 6 , wherein the LED, the optic coupler, and the narrow bandpass filter are disposed within a common housing.
9 . The measurement apparatus of claim 8 , wherein the compact light source is reversibly attachable and detachable with respect to the measurement instrument.
10 . The measurement apparatus of claim 6 , wherein the measurement instrument is arranged to conduct the fluid sample through the sample vessel.
11 . The measurement apparatus of claim 6 , the probe signal comprising a monochromatic signal characterized by a wavelength in a range of ultraviolet (UV) to infrared (IR) wavelengths, and having a bandwidth of less than 1 nm after exiting the compact light source.
12 . A system to measure a concentration of a material in a fluid sample, comprising:
a compact light source, comprising a light emitting diode (LED), to generate a probe signal, an optic coupler, disposed adjacent to the LED; and a narrow bandpass filter disposed to receive the probe signal at a first bandwidth, and to output the probe signal at a second bandwidth, less than the first bandwidth;
a measurement instrument, to receive the probe signal, the measurement instrument comprising:
a sample vessel to contain a fluid sample, the sample vessel comprising a vessel wall;
a probe, having a probe tip, arranged to direct the probe signal through the sample vessel, wherein the probe is movable along a probe direction with respect to the vessel wall, so as to reduce a path length of the probe signal through the fluid sample; and
a detector, disposed to receive the probe signal after passing through the vessel wall,
wherein the LED, the optic coupler, and the narrow bandpass filter form a monochromatic light source.
13 . The system of claim 12 , the probe signal comprising a monochromatic signal characterized by a wavelength in a range of ultraviolet (UV) to infrared (IR) wavelengths, and having a bandwidth of less than 1 nm after exiting the compact light source.
14 . The system of claim 12 , wherein the LED, the optic coupler, and the narrow bandpass filter are disposed within a common housing.
15 . The system of claim 12 , wherein the compact light source is reversibly attachable and detachable with respect to the measurement instrument.
16 . The system of claim 12 , wherein the measurement instrument is arranged to conduct the fluid sample through the sample vessel.
17 . The system of claim 12 , the sample vessel further comprising:
an inlet port to admit the fluid sample;
an outlet port to conduct the fluid sample out of the sample chamber vessel; and
a transparent window disposed between the probe tip and the detector.