Low cost combination spectral-spatial vision system

• US 20110141299A1
• Filed: 04/11/2008
• Published: 06/16/2011
• Est. Priority Date: 06/30/1999
• Status: Abandoned Application

• Current Assignee: Masten Opto-Diagnostic Company
• Original Assignee: Masten Opto-Diagnostic Company
• Inventors: Masten, Billy R.
• Application Number:
  US12/082,493
• Publication Number:
  US 20110141299A1
• Time in Patent Office: Days
• US Class Current: 348/222.1
• CPC Class Codes: G01J 3/2803 using photoelectric array detector
• CPC Class Codes: G01J 3/2823 Imaging spectrometer
• CPC Class Codes: G01J 3/42 Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry beam switching arrangements G01J3/08
• CPC Class Codes: G01N 21/31 Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry G01N21/72 takes precedence
• CPC Class Codes: G01N 21/3563 for analysing solids; Preparation of samples therefor
• CPC Class Codes: G01N 21/8806 Specially adapted optical and illumination features

Abstract

A combined spectral and spatial sensing unit having a lens for receiving light from an object or substance and for directing at least a portion thereof through a diffraction device to an area imager for creating a digital spectral image of a plurality of segments of different wave lengths of light on a first set of pixels of said imager and for creating a digital spatial image on a second set of pixels of said imager, and an analytical unit having a microprocessor for receiving each of said images and comparing same to images stored in a memory associated with said microprocessor to determine the identity, condition or other information about the object or substance. Alternatively, a portion of said light may be directed through a diffraction grating to a first imager and another portion to a second imager, each of which is associated with a microprocessor for determining the identity, condition or other information about the object or substance.

Claims

1. A combination vision system for selectively sensing spectral and/or spatial information from an object or substance and for analyzing such information to determine the identity, condition or other information about said object or substance, said system comprising:

a) a sensing apparatus for receiving light from said object or substance and for directing at said light upon a imaging system to obtain a first linear digital spectral image of at least a portion of said object or substance and a second linear digital spatial image of at least a portion of said object or substance; and

b) a digital processing unit for receiving said images and for determining the identity, condition or other information of said object or substance.

2. A combination as recited in claim 1 in which said sensing apparatus comprises

a) a lens system for directing said light through a diffraction device to divide said light into segments of wavelengths;

and

b) said imaging system comprises at least one area array that is positioned so as to receive said diffracted light; and

c) said digital processing unit receives said spectral image from a first group of pixels of said area array and said spatial image from a group of pixels perpindicular to said first group of pixels.

3. A combination as recited in claim 1 in which said digital processing unit includes a Digital Signal Processor having an algorithm for determining said identity, condition or other information from said object or substance.

4. A combination as recited in claim 1 in which a memory is associated with said digital processing unit and said memory contains at least one digital spectral image or digital spatial image for comparison with the spectral or spatial image of said object or substance to determine its identity, condition or other information.

5. A combination as recited in claim 4 in which said at least one digital or spectral comparison image is created by aiming said combination at an object or substance and activating said combination to place said object or substance in said memory as a standard of comparison.

7. A sensing and identification device with a simple setup for identifying an object or substance, said device comprising:

a) a sensor having an imager for receiving light from an object or substance and for creating a unique digital fingerprint of said object or substance;

b) a digital identifier having a first associated memory for receiving a standard digital fingerprint of said object and a second associated memory for receiving a fingerprints of subsequent objects or substances to be identified and an associated algorithm for comparing said said fingerprints of said subsequent objects or substances with said standard digital fingerprint; and

c) a switch to initiate generation of said standard digital fingerprint.