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US 5,289,006 AGranted
Thermal imaging apparatus
AssigneeAllied-Signal Inc.
InventorEli Gal
Life of this patent
Estimating the term…
Abstract
Thermal imaging apparatus including a non-linear optomechanical scanner receiving light from a scene and directing it onto an image plane, the scanner defining a non-linear scan velocity in the image plane, a SPRITE detector disposed in the image plane and including first and second spaced contacts and apparatus for applying a bias voltage across said contacts, and apparatus for varying the bias voltage across the contacts as a function of the non-linear scan velocity, thereby to compensate for the non-linearity of the optomechanical scanner.
Claims20
Scanning apparatus comprising:
- a non-linear optomechanical scanner receiving light from a scene and directing it onto an image plane, said scanner defining a non-linear scan velocity in the image plane;
- a SPRITE detector disposed in said image plane and including first and second spaced contacts and means for applying a bias voltage across said contacts;
- means for sensing the velocity of the scanner in real time as it scans across the image plane;
- and
- means for dynamically varying the bias voltage across said contacts as a function of the sensed non-linear scan velocity, thereby to compensate for the non-linearity of the optomechanical scanner.
2 more elements
Scanning apparatus comprising:
- a non-linear optomechanical scanner receiving light from a scene and directing it onto an image plane, said scanner defining a non-linear scan velocity in the image plane;
- an elongate detector disposed in said image plane and including means for performing time delay and integration therealong and means for controlling the rate of time delay and integration;
- means for sensing the velocity of the scanner in real time as it scans across the image plane;
- and
- means for dynamically varying the rate of time delay and integration of said elongate detector as a function of the sensed non-linear scan velocity, thereby to compensate for the non-linearity of the optomechanical scanner.
2 more elements
Scanning apparatus comprising:
- a non-linear optomechanical scanner receiving light from a scene and directing it onto an image plane, said scanner defining a non-linear scan velocity in the image plane;
- a SPRITE detector disposed in said image plane and including first and second spaced contacts and means for applying a bias voltage across said contacts;
- means for sensing the velocity of the scanner in real time as it scans across the image plane;
- and
- means for dynamically varying the bias voltage across said contacts as a function of the sensed non-linear scan velocity, thereby to compensate for the non-linearity of the optomechanical scanner;
- and
- wherein said apparatus is suitable for use for scanning in either of two opposite directions and includes means for selectably switching the polarity of the bias voltage across said contacts.
4 more elements
Scanning apparatus comprising:
- a non-linear optomechanical scanner receiving light from a scene and directing it onto an image plane, said scanner defining a non-linear scan velocity in the image plane;
- an elongate detector disposed in said image plane and including means for performing time delay and integration therealong and means for controlling the rate of time delay and integration;
- means for sensing the velocity of the scanner in real time as it scans across the image plane;
- and
- means for dynamically varying the rate of time delay and integration of said elongate detector as a function of the sensed non-linear scan velocity, thereby to compensate for the non-linearity of the optomechanical scanner, and
- wherein said apparatus is suitable for use for scanning in either of two opposite directions.
3 more elements
Scanning apparatus comprising:
- a non-linear optomechanical scanner receiving light from a scene and directing it onto an image plane, said scanner defining a non-linear scan velocity in the image plane;
- a SPRITE detector disposed in said image plane and including first and second spaced contacts and means for applying a bias voltage across said contacts;
- a memory providing a pre-measured indication of non-linearity of the scanner and whose output is synchronized with the motion of the scanner;
- means for varying the bias voltage across said contacts as a function of the non-linear scan velocity, thereby to compensate for the non-linearity of the optomechanical scanner.
1 more element
Scanning apparatus comprising:
- a non-linear optomechanical scanner receiving light from a scene and directing it onto an image plane, said scanner defining a non-linear scan velocity in the image plane;
- an elongate detector disposed in said image plane and including means for performing time delay and integration therealong and means for controlling the rate of time delay and integration;
- a memory providing a pre-measured indication of non-linearity of the scanner and whose output is synchronized with the motion of the scanner;
- means for varying the rate of time delay and integration of said elongate detector as a function of the non-linear scan velocity, thereby to compensate for the non-linearity of the optomechanical scanner.
1 more element
Scanning apparatus comprising:
- a non-linear optomechanical scanner receiving light from a scene and directing it onto an image plane, said scanner defining a non-linear scan velocity in the image plane;
- a SPRITE detector disposed in said image plane and including first and second spaced contacts and means for applying a bias voltage across said contacts;
- a memory providing a pre-measured indication of non-linearity of the scanner and whose output is synchronized with the motion of the scanner;
- means for varying the bias voltage across said contacts as a function of the non-linear scan velocity, thereby to compensate for the non-linearity of the optomechanical scanner;
- and
- wherein said apparatus is suitable for use for scanning in either of two opposite directions and includes means for selectably switching the polarity of the bias voltage across said contacts.
3 more elements
Scanning apparatus comprising:
- a non-linear optomechanical scanner receiving light from a scene and directing it onto an image plane, said scanner defining a non-linear scan velocity in the image plane;
- an elongate detector disposed in said image plane and including means for performing time delay and integration therealong and means for controlling the rate of time delay and integration;
- a memory providing a pre-measured indication of non-linearity of the scanner and whose output is synchronized with the motion of the scanner;
- means for varying the rate of time delay and integration of said elongate detector as a function of the non-linear scan velocity, thereby to compensate for the non-linearity of the optomechanical scanner, and
- wherein said apparatus is suitable for use for scanning in either of two opposite directions.
2 more elements
Dependencies are inferred from the claim text.