New Miniaturized Spectral Measurement Platforms Covering the Visible to the Mid-IR

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1 New Miniaturized Spectral Measurement Platforms Covering the Visible to the Mid-IR John Coates Coates Consulting CPAC NeSSI Workshop, November 2010

2 Paradigm Shifts in Spectroscopic Measurements: Example Spectral Sensors Traditional spectroscopic instrumentation Original implementations tend to be large and expensive Process analyzers are usually in large boxes Trend to point of measurement or sample production, process and environmental Smaller instruments favor in a distributed measurement scheme Recent trends towards portable and handheld Current trends a good fit with enabling technologies such as miniaturization, MEMS, handheld computing and wireless The GameChangers spectral sensors and detectors fully integrated devices based on solid state components

3 Key Enabling Technologies for Miniaturization and Low Cost Thin film filter technologies Bandpass filters covering from deep UV (220nm) to the mid-ir (15 m, 15,000nm) Patterned filters produced by microlithography techniques Linear variable filters currently from the long UV (350nm) to the mid-ir (15 m, 15,000nm) MEMS as applied to spectroscopy Detector arrays in the mid-ir Lasers and LEDs Broad range of LEDs from UV (250nm) to NIR (1450nm) and out to the upper mid-ir (around 3 m) QCL Mid-IR lasers Fiber optics Materials available covering from far UV to mid-ir Fiber faceplates for optical interfacing and geometry conversion

4 New Technologies Simple Photometric Engines & Applications UV-Visible Light Photometric Sensors Color-based measurements Fluorescence methods Near-Infrared Photometric Sensors Solvents, oil and petroleum products Reaction monitoring known targets Liquid products consumer products Powders and solid substrates Mid-Infrared Photometric Sensors Mid-IR Photometer includes handheld diagnostic systems Multicomponent gas analyzers Multicomponent fluid analyzers

5 Miniaturization of Spectral Measurements: The LVF Spectral Engine An Example of a Spectral Engine: - Featuring a Spatially Selective Spectral Sensor - Example can be applied to UV-vis, NIR, Raman and mid-ir Spectra Process Data Results

6 The LVF Concept: How it Works %T Mirror Spacer Mirror Substrate Wavelength The center transmission wavelength varies linearly across the length of the filter. In the example the extreme left end of the LVF transmits a narrow range of blue wavelength only (short wavelength). As you move to the right the thickness increases and a longer wavelength is transmitted. Eventually at the extreme right only a narrow band of red light (long wavelength) is transmitted.

7 The MicroPac: The First Commercial LVF Spectral Engine by OCLI/JDSU The MicroPac: An integrated spectral engine introduced in 2000/2001

8 An Example Miniaturized Visible LVF Spectrometer: The Mutoh MSE Module MSE Micro-Spectral Engine A Fully Integrated Spectrometer Module Miniaturized Light Source Fully Integrated Module (Incandescent or LED-based)

9 Embedded Application for Spectral Detector Concept: SW NIR In-Line Sensing Measurement Chamber Source MSE Fluid Fully Integrated Source Module (Incandescent or LED-based MSE Fully Integrated Microspectrometer Module Spectral range 600nm to 1050nm

10 Current Implementation of an Integrated NIR Spectral Sensor Light Sources Integrated Electronics Integrated System includes light sources Reflectance mode illustrated Reflectance Mode (Solids)

11 Packaged Sensor with Integrated Illumination

12 Integrated NIR Spectral Sensor Adapted for In-Line Liquid Monitoring NIR NeSSI Sensor Generic NeSSI

13 Spectral Sensor Adapted for Transmission Measurements Integrated Electronics Flow or disposable Cell Liquids Gases and Vapors Transmission Mode (Gases and Liquids)

14 Example Data Spectral Sensor: Common Solvents

15 Mid-Infrared Spectral Sensors: Multichannel Analyzer 1 to 16 channels Filter Mosaics Liquids or gases High-speed acquisition near realtime (0.1 second measurement cycle) for all channels Low cost, compact

16 Short Path Version Multichannel Analyzer: High Concentration Gases and Liquids Bench-top, Handheld Or Embedded Applications

17 Long Path Multichannel Gas Analyzer: Low Level Measurements Bench-top, Handheld Or Embedded Applications

18 Stand-alone or Embedded Mid-IR LVF-Based ATR Analyzer To be introduced in 2011 First in a new series Designed for embedded, benchtop and handheld applications Configurations: ATR Transmission

19 Keeping Spectroscopy Small, Simple and Low Cost! Keeping Spectroscopy Small Palm-sized Analyzers In-line sensors Embedded spectrometers Spectral detectors Spectroscopy Applications UV-Visible Spectral Detector Color and Colorimetric measurements Fluorescence and Luminescence methods Near-Infrared Spectral Detector NIR Absorption Mid-IR Spectral Detector Gas and Liquids - MEMS-based technology <$1000 Cost effective solutions UV-Vis target costs $200 (volume) SW-NIR from $25 (High Volume) LW-NIR ~$1500 (Volume) IR from $1000