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Shutter Assembly with Calibration Material

a shutter assembly and material technology, applied in the direction of instruments, spectrometry/spectrophotometry/monochromators, optical radiation measurement, etc., can solve the problems of user safety, difficult to achieve an acceptable signal-to-noise ratio, and light that reflects or bounces off the sample is largely noise rather than useful signal, so as to facilitate calibration. the effect of checking

Inactive Publication Date: 2012-08-16
DIRAMED LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]An object of the present invention is to provide a shutter assembly which both protects a user and enables convenient checking of calibration while it covers a measurement window.
[0010]Another object of the present invention is to automate the process of checking the calibration for spectrometers as frequently as desired.

Problems solved by technology

Light that reflects or bounces off the sample is largely noise rather than useful signal.
It is often challenging to achieve an acceptable signal-to-noise ratio, even with well-calibrated systems.
User safety is another critical issue when using optical radiation sources, especially when a person's eyes may be exposed to potentially harmful radiation.
These mitigating techniques can be very bulky and encumbering to users.

Method used

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  • Shutter Assembly with Calibration Material
  • Shutter Assembly with Calibration Material
  • Shutter Assembly with Calibration Material

Examples

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Embodiment Construction

[0033]This invention may be accomplished by a shutter assembly for use with a spectrometer having at least one source of optical radiation, such as at least one laser, capable of generating an excitation light beam such as a laser beam with at least one desired spectral feature and having an illumination path. The shutter assembly includes a shutter having at least one of (i) at least one calibration material capable of generating a consistent spectrum within wavelengths utilizable by the spectrometer and (ii) a mirror capable of diverting at least one of the illumination path and a collection path relative to a calibration standard, such as a calibration material or a calibration light source, capable of generating a consistent spectrum within wavelengths utilizable by the spectrometer. The calibration material is carried by the shutter in some constructions and, in other constructions, forms the shutter itself. The shutter assembly further includes a mechanism capable of moving th...

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Abstract

A shutter assembly for use with a spectrometer having at least one source of optical radiation such as at least one laser capable of generating an excitation light beam having an illumination path. The shutter assembly includes a shutter having at least one of (i) at least one calibration material capable of generating a consistent spectrum within wavelengths utilizable by the spectrometer and (ii) a mirror capable of diverting at least one of the illumination path and a collection path relative to a calibration standard capable of generating a consistent spectrum within wavelengths utilizable by the spectrometer. The shutter assembly further includes a mechanism capable of moving the shutter into at least a first position in the path of the light beam and a second position out of the path of the light beam to enable a sample to be analyzed.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to U.S. Provisional Application No. 61 / 441,317 filed 10 Feb. 2011.FIELD OF THE INVENTION[0002]The invention relates to a movable shutter assembly for use with a spectrometer and more particularly to a shutter having calibration material associated with it.BACKGROUND OF THE INVENTION[0003]There has been a long-felt need for systems that accurately and non-invasively measure one or more analytes in a sample, especially for a variety of healthcare procedures. Spectroscopic systems for optically measuring blood analytes, including Raman spectroscopy for measuring glucose levels in blood or tissue of a patient, using a light source such as a laser or a laser diode, are described in U.S. Pat. No. 7,039,448 by Schlegel et al. and in U.S. Patent Publication No. 2008 / 0316446 by Higgins et al., both assigned to DIRAmed, LLC. Other non-invasive optical techniques for measuring one or more blood components are disclose...

Claims

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Application Information

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IPC IPC(8): G01J3/28G01J3/44
CPCG01J3/28G01J3/0232G01J3/0297G01J3/44G01N21/274
Inventor HIGGINS, RICHARD J.LIPP, BRIANCAUDY, DON WARREN
Owner DIRAMED LLC