WO2009034403A1 - Multi user uv-vis/nir array spectrophotometer using a fiber optic probe/sphere and photonic switches - Google Patents

Multi user uv-vis/nir array spectrophotometer using a fiber optic probe/sphere and photonic switches Download PDF

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Publication number
WO2009034403A1
WO2009034403A1 PCT/IB2007/002641 IB2007002641W WO2009034403A1 WO 2009034403 A1 WO2009034403 A1 WO 2009034403A1 IB 2007002641 W IB2007002641 W IB 2007002641W WO 2009034403 A1 WO2009034403 A1 WO 2009034403A1
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WO
WIPO (PCT)
Prior art keywords
spectrophotometer
fiber optic
optic probe
sphere
user
Prior art date
Application number
PCT/IB2007/002641
Other languages
French (fr)
Inventor
Ramesh Datla
Original Assignee
Ramesh Datla
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ramesh Datla filed Critical Ramesh Datla
Priority to PCT/IB2007/002641 priority Critical patent/WO2009034403A1/en
Publication of WO2009034403A1 publication Critical patent/WO2009034403A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • G01J3/0218—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using optical fibers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0264—Electrical interface; User interface
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/027—Control of working procedures of a spectrometer; Failure detection; Bandwidth calculation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28—Investigating the spectrum
    • G01J3/2803—Investigating the spectrum using photoelectric array detector

Definitions

  • the Spectrophotometers in any analytical laboratory are restricted to one user at a time. No one has conceived of a process of multiple users using the same spectrophotometer at same time for different analysis.
  • Fig.3 shows the first embodiment of a photonic switch with a time-slot interchanger (numeral I) using N reentrant fiber-loop memories (numeral II), as described by Thompson.
  • the 1 x N optical switch (numeral III) and the N x 1 Optical Switch (numeral IV) are series of N interconnected 1 x 2 optical switches (numeral V).
  • Each fiber loop memory includes a 2 x 2 optical switch (numeral Vl) that is implemented by lithium niobate directional couplers.
  • a clock (numeral VII), controller (numeral VIII) and drivers (numeral IX) complete the system.
  • Fig.4 illustrates the use of a 2 x 2 (numeral 1) cascade - structured integrated optical switch (numeral II) in a fiber loop delay line (numeral IV) memory (numeral III) of the type shown Fig. 3.
  • Switch Il can be used to replace some or all of the conventional directional coupler switches Vl in the fiber loop memory (numeral II) of fig.2 to significantly reduce any cross talk or the non- addressed spurious light.
  • Photometric Range 0-100% or -3 to +3 AU.
  • Photometric Accuracy 0.01% Transmission or 0.001 AU.
  • Fiber optic Probe A two way fiber optic to transmit the incident light pulse on to the sample and also returns the transmitted or reflected signal from the sample to the instrument.
  • Photonic Switch n x n (where n is > 2).
  • the present invention discloses a multi user environment for a single spectrophotometer using fiber optic probes/spheres and photonic switches.
  • the spectrophotometer and the fiber optic probe/sphere act as server/client architecture where the spectrophotometer is the server and the fiber optic probe/sphere is the client.
  • the client set up is at the user end.
  • the spectrophotometer is connected to a server computer while each user has client systems. Through the client computer each user sends the input data to the spectrophotometer through the server.
  • the relevant wavelength light for transmission or absorbance or reflectance depending on the user's requirement passes through the different input channels of the photonic switch and reaches the sample holder through the fiber optic probe or the sphere through the output channel of the photonic switch.
  • the signal from the photonic switch comes back to the output channel of the photonic switch through the two way fiber optic probe and falls on the detector of the spectrophotometer and the data is transferred to client computer through the server ' computer.
  • the switch over time from user to user in the photonic switch, in the spectrophotometer, transfer of data and usage of two fiber optic probe depends on the specifications of photonic switch chosen, This architecture finds application in any analytical lab conditions, where a spectrophotometer has to be used by multiple number of lab personnel.
  • the spectrophotometer is an array based or CCD based, in the working range of UV/VIS/NIR.
  • Fig.1 is a ⁇ block diagram showing the configuration of the multi user architecture with the instrument.
  • Fig.2 is a flow chart showing the different operations incorporated in the architecture.
  • Fig.3 is a diagram of a prior art photonic switch using a re-entrant fiber loops.
  • Fig.4 is a schematic diagram of a prior art of an optical re-entrant memory using a two-stage cascade structured integrated optical 2 x 2 switch.
  • Fig.1 is a block diagram showing the configuration of multi user architecture with the instrument, according to an embodiment of the present invention is applicable.
  • V the spectrophotometer (which is a diode array based or CCD based), acts as a server, which takes the inputs from the client PCs at the user end (U 1 to U4) through the server PC (numeral Vl) connected directly to the spectrophotometer.
  • I 1 the light source (UV/VIS/NIR) transfer light to the respective fiber optic probes (numeral IIIA)/spheres (numeral IHB) at the respective users end (U 1 to U4) through the different channels of the photonic switch (numeral II).
  • the light through the fiber optic probe falls on the sample holder and the light transmitted or reflected signal from the different samples at the respective users end depending on their respective applications passes through the respective fiber optic probes. They reach their respective channel positions in the photonic switch (numeral IV) and fall on the diode array of the spectrophotometer (numeral V).
  • the output data from the detector of the spectrophotometer from respective channels reaches the client computers (U 1 to U4) of the respective users through the server computer (numeral Vl) attached to the spectrophotometer (numeral V).
  • Fig.2 is a flowchart showing an example of the multi user environment using a spectrophotometer, photonic switch and fiber optic probe/ sphere system according to an embodiment of the present invention
  • Numerals, 1 to 6 represent the processing steps for prompting the incidence of the wavelengths of light on the sample from independent users (n no.)
  • the system shown in Fig.1 executes an initialization process and transfers the light onto different samples for the different users independently and simultaneously.
  • Numerals, 7 to 10 represent the processing steps for capturing the transmitted or reflected light based on each user's application.
  • the system shown in Fig.1 captures the signals from different users simultaneously and independently and transfers to the spectrophotometer diode array detector or CCD through the photonic switch and further to the respective client computers of the users through the spectrophotometer server computer for further processing.
  • the architecture in the patent works on the principle of computers client server architecture.
  • the Spectrophotometer is like the server and would facilitate any number (say n) of users at the same time for different analyses of their requirement through network switches. This is facilitated through the usage of a Fiber Optic Probe/Sphere and Photonic Switches.
  • a Fiber Optic Probe or Sphere based on the application is provided as a client.
  • n number of Fiber Optic Probes/Spheres would be connected through the photonic switch to the Spectrophotometer, which would facilitate the user to choose his parameters of analysis, through simultaneous wavelength sensing with appropriate software installed in the PC connected to the Spectrophotometer through regular computer network.
  • the spectrophotometer and the fiber optic probe/sphere act as server/client architecture where the spectrophotometer is the server and the fiber optic probe/sphere is the client.
  • the client set up is at the user end.
  • the spectrophotometer is connected to a server computer while each user has client systems. Through the client computer each user sends the input data to the • spectrophotometer through the server.
  • the relevant wavelength light for transmission or absorbance or reflectance depending on the user's requirement passes through the different input channels of the photonic switch and reaches the sample holder through the fiber optic probe or the sphere through the output channel of the photonic switch.
  • the signal from the photonic switch comes back to the output channel of the photonic switch through the two way fiber optic probe and falls on the detector of the spectrophotometer and the data is transferred to client computer through the server computer.
  • the switch over time from user to user in the photonic switch, in the spectrophotometer, transfer of data and usage of two fiber optic probe depends on the specifications of photonic switch chosen.
  • This architecture finds application in any analytical lab conditions, where a spectrophotometer has to be used by multiple number of lab personnel.
  • the spectrophotometer is an array based or CCD based, in the working range of UV/VIS/NIR.
  • Photometric Range 0-100% or -3 to +3 AU.
  • Photometric Accuracy 0.01% Transmission or 0.001 AU.
  • Fiber optic Probe A two way fiber optic to transmit the incident light pulse on to the sample and also returns the transmitted or reflected signal from the sample to the instrument.
  • Photonic Switch n x n (where n is > 2).

Abstract

The present patent is about a multi user UV-VIS/NIR array spectrophotometer using a Fiber Optic Probe/Sphere and Photonic Switches based on the principle of computers client server architecture, where a spectrophotometer acts as a server and the fiber optic probe/sphere acts as a client. Any number of users can operate at the same time to use the instrument for their respective analyses through simultaneous wavelength sensing with appropriate software installed in the PC connected to the Spectrophotometer through regular computer network.

Description

Multi user UV-VIS/NIR Array Spectrophotometer using a Fiber Optic Probe/Sphere and Photonic Switches
Background of the invention:
The Spectrophotometers in any analytical laboratory are restricted to one user at a time. No one has conceived of a process of multiple users using the same spectrophotometer at same time for different analysis.
Prior Art: The fiber optic channel selecting apparatus (Patent no. US6496618 B1) and photonic switches (patent no. US5103333) and Fiber Optic Channel Selecting Device (Patent no. US 6950568 B2) are already known.
Fig.3 shows the first embodiment of a photonic switch with a time-slot interchanger (numeral I) using N reentrant fiber-loop memories (numeral II), as described by Thompson. The 1 x N optical switch (numeral III) and the N x 1 Optical Switch (numeral IV) are series of N interconnected 1 x 2 optical switches (numeral V). Each fiber loop memory includes a 2 x 2 optical switch (numeral Vl) that is implemented by lithium niobate directional couplers. A clock (numeral VII), controller (numeral VIII) and drivers (numeral IX) complete the system.
Fig.4 illustrates the use of a 2 x 2 (numeral 1) cascade - structured integrated optical switch (numeral II) in a fiber loop delay line (numeral IV) memory (numeral III) of the type shown Fig. 3. Switch Il can be used to replace some or all of the conventional directional coupler switches Vl in the fiber loop memory (numeral II) of fig.2 to significantly reduce any cross talk or the non- addressed spurious light.
Over all design:
Spectrophotometer Specifications:
Multi User UV-VIS-NIR Spectrophotometer.
Spectrophotometer type Bench top:
Spectral range: 190-1100-3200 nm.
i Wavelength Interval: 0.1 nm.
Source: Xenon Flash Lamp/Deuterium/Tungsten Halogen
Measurement Mode: Absorbance and % Transmission, %Reflectance.
Measurement principle: Double Beam/Single Beam.
Photometric Range: 0-100% or -3 to +3 AU.
Photometric Accuracy: 0.01% Transmission or 0.001 AU.
Calibration: Solvents, BaSO4
Sphere Geometry: This can be D/8, D/0, 45/0, 0/45, D (hemisphere)/8, D(hemisphere)/0 Invention patent applies to all the above geometries and 180° for Transmission.
Detector: Photodiode array / CCD
Fiber optic Probe: A two way fiber optic to transmit the incident light pulse on to the sample and also returns the transmitted or reflected signal from the sample to the instrument. Photonic Switch: n x n (where n is > 2).
Summary of the invention
The present invention discloses a multi user environment for a single spectrophotometer using fiber optic probes/spheres and photonic switches.
The spectrophotometer and the fiber optic probe/sphere act as server/client architecture where the spectrophotometer is the server and the fiber optic probe/sphere is the client. The client set up is at the user end. The spectrophotometer is connected to a server computer while each user has client systems. Through the client computer each user sends the input data to the spectrophotometer through the server. The relevant wavelength light for transmission or absorbance or reflectance depending on the user's requirement passes through the different input channels of the photonic switch and reaches the sample holder through the fiber optic probe or the sphere through the output channel of the photonic switch. The signal from the photonic switch comes back to the output channel of the photonic switch through the two way fiber optic probe and falls on the detector of the spectrophotometer and the data is transferred to client computer through the server'computer. In the multi user environment, the switch over time from user to user in the photonic switch, in the spectrophotometer, transfer of data and usage of two fiber optic probe depends on the specifications of photonic switch chosen, This architecture finds application in any analytical lab conditions, where a spectrophotometer has to be used by multiple number of lab personnel. The spectrophotometer is an array based or CCD based, in the working range of UV/VIS/NIR.
Brief Description of Drawings
Fig.1 is a~ block diagram showing the configuration of the multi user architecture with the instrument.
Fig.2 is a flow chart showing the different operations incorporated in the architecture.
Fig.3 is a diagram of a prior art photonic switch using a re-entrant fiber loops.
Fig.4 is a schematic diagram of a prior art of an optical re-entrant memory using a two-stage cascade structured integrated optical 2 x 2 switch.
Description of the invention:
Fig.1 is a block diagram showing the configuration of multi user architecture with the instrument, according to an embodiment of the present invention is applicable. Referring to Fig.1, numeral V, the spectrophotometer (which is a diode array based or CCD based), acts as a server, which takes the inputs from the client PCs at the user end (U 1 to U4) through the server PC (numeral Vl) connected directly to the spectrophotometer. Numeral I1 the light source (UV/VIS/NIR) transfer light to the respective fiber optic probes (numeral IIIA)/spheres (numeral IHB) at the respective users end (U 1 to U4) through the different channels of the photonic switch (numeral II). The light through the fiber optic probe falls on the sample holder and the light transmitted or reflected signal from the different samples at the respective users end depending on their respective applications passes through the respective fiber optic probes. They reach their respective channel positions in the photonic switch (numeral IV) and fall on the diode array of the spectrophotometer (numeral V). The output data from the detector of the spectrophotometer from respective channels reaches the client computers (U 1 to U4) of the respective users through the server computer (numeral Vl) attached to the spectrophotometer (numeral V). Fig.2 is a flowchart showing an example of the multi user environment using a spectrophotometer, photonic switch and fiber optic probe/ sphere system according to an embodiment of the present invention, Numerals, 1 to 6 represent the processing steps for prompting the incidence of the wavelengths of light on the sample from independent users (n no.) When started the system shown in Fig.1 executes an initialization process and transfers the light onto different samples for the different users independently and simultaneously.
Numerals, 7 to 10 represent the processing steps for capturing the transmitted or reflected light based on each user's application. When started the system shown in Fig.1 captures the signals from different users simultaneously and independently and transfers to the spectrophotometer diode array detector or CCD through the photonic switch and further to the respective client computers of the users through the spectrophotometer server computer for further processing.
The architecture in the patent, works on the principle of computers client server architecture. The Spectrophotometer is like the server and would facilitate any number (say n) of users at the same time for different analyses of their requirement through network switches. This is facilitated through the usage of a Fiber Optic Probe/Sphere and Photonic Switches. At the desk of each user a Fiber Optic Probe or Sphere based on the application is provided as a client. Then n number of Fiber Optic Probes/Spheres would be connected through the photonic switch to the Spectrophotometer, which would facilitate the user to choose his parameters of analysis, through simultaneous wavelength sensing with appropriate software installed in the PC connected to the Spectrophotometer through regular computer network.
The spectrophotometer and the fiber optic probe/sphere act as server/client architecture where the spectrophotometer is the server and the fiber optic probe/sphere is the client. The client set up is at the user end. The spectrophotometer is connected to a server computer while each user has client systems. Through the client computer each user sends the input data to the • spectrophotometer through the server. The relevant wavelength light for transmission or absorbance or reflectance depending on the user's requirement passes through the different input channels of the photonic switch and reaches the sample holder through the fiber optic probe or the sphere through the output channel of the photonic switch. The signal from the photonic switch comes back to the output channel of the photonic switch through the two way fiber optic probe and falls on the detector of the spectrophotometer and the data is transferred to client computer through the server computer. In the multi user environment, the switch over time from user to user in the photonic switch, in the spectrophotometer, transfer of data and usage of two fiber optic probe depends on the specifications of photonic switch chosen. This architecture finds application in any analytical lab conditions, where a spectrophotometer has to be used by multiple number of lab personnel. The spectrophotometer is an array based or CCD based, in the working range of UV/VIS/NIR.
Over all design:
Spectrophotometer Specifications:
Multi User UV-VIS-NIR Spectrophotometer.
Spectrophotometer type Bench top:
Spectral range: 190-1100-3200 nm.
Wavelength Interval: 0.1 nm.
Source: Xenon Flash Lamp/Deuterium/Tungsten Halogen
Measurement Mode: Absorbance and % Transmission, %Reflectance.
Measurement principle: Double Beam/Single Beam.
Photometric Range: 0-100% or -3 to +3 AU.
Photometric Accuracy: 0.01% Transmission or 0.001 AU.
Calibration: Solvents, BaSO4
Sphere Geometry: This can be D/8, D/0, 45/0, 0/45, D (hemisphere)/8, D(hemisphere)/0 Invention patent applies to all the above geometries and 180° for Transmission.
Detector: Photodiode array / CCD
Fiber optic Probe: A two way fiber optic to transmit the incident light pulse on to the sample and also returns the transmitted or reflected signal from the sample to the instrument. Photonic Switch: n x n (where n is > 2).

Claims

What is claimed is,
1. A spectrophotometer providing a multi user environment through the use of a photonic switch and fiber optic probes/spheres.
2. The system according to claim 1 , can be used to study not limited to transmission, scattering or reflection from the sample.
3. The system-according claim 1 makes use of a server, client architecture with the spectrophotometer acting as a server and the fiber optic probes/spheres at the user end acting as clients.
4. The system according to claim 1, uses an n x n (where n > 2) photonic switch to transfer the respective chosen wavelengths of lights and modes of operation from different users (say n no.) independently and simultaneously from the spectrophotometer to the sample holder at the user's end.
5. The system according to claim 1 , captures the transmitted light or the reflected light from the sample through the two-way fiber optic probe to the photonic switch onto the diode array detector or CCD in the spectrophotometer independently and simultaneously from the multiple users.
6. The system according to claim 1 , transfers the signal from the diode array detector or CCD to the client computers independently and simultaneously through the server computer, for further data processing.
PCT/IB2007/002641 2007-09-13 2007-09-13 Multi user uv-vis/nir array spectrophotometer using a fiber optic probe/sphere and photonic switches WO2009034403A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2007/002641 WO2009034403A1 (en) 2007-09-13 2007-09-13 Multi user uv-vis/nir array spectrophotometer using a fiber optic probe/sphere and photonic switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2007/002641 WO2009034403A1 (en) 2007-09-13 2007-09-13 Multi user uv-vis/nir array spectrophotometer using a fiber optic probe/sphere and photonic switches

Publications (1)

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WO2009034403A1 true WO2009034403A1 (en) 2009-03-19

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Country Status (1)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4509212A (en) * 1983-03-10 1985-04-02 Corning Glass Works Multiple-user optical analyzer system using optical network for data transmission and control
US5085499A (en) * 1988-09-02 1992-02-04 Battelle Memorial Institute Fiber optics spectrochemical emission sensors

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4509212A (en) * 1983-03-10 1985-04-02 Corning Glass Works Multiple-user optical analyzer system using optical network for data transmission and control
US5085499A (en) * 1988-09-02 1992-02-04 Battelle Memorial Institute Fiber optics spectrochemical emission sensors

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