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US 12,361,239 B2Granted
Method, apparatus, and system for characterizing an optical system
AssigneeHand Held Products, Inc.
InventorsH Sprague Ackley, Si Qian, Thomas Axel Jonas Celinder, Sebastien D'Armancourt
Life of this patent
Estimating the term…
Abstract
Techniques for characterizing an optical system (for example, a printer verifier) are provided. In this regard, the optical system may be characterized for scanning a printer image. The characterization of the optical system includes determining an effective aperture size of the optical system, and correspondingly an effective resolution at which the optical system can be configured to scan a portion of the printer image according to verification requirements.
Claims20
A printer comprising:
- a printhead;
- an optical system comprising an optical sensor;
- and
- a processor in electronic communication with the optical system and the printhead, wherein the processor is configured to:
- cause the printer to print a pattern comprising bars and spaces of defined specifications;
- cause the optical sensor to scan the printed pattern;
- analyze a scanned reflectance profile (SRP) of the scanned printed pattern based on:
- determining a first width of at least one space in the scanned printed pattern;
- determining a second width of at least one bar in the scanned printed pattern;
- and
- comparing the determined first width of at least one space with the determined second width of at least one bar to validate the scanned printed pattern according to a pre-defined acceptance criterion;
- and
- record thermal management settings of the printer.
10 more elements
A method comprising:
- causing, by a processor, a printer to print a pattern comprising bars and spaces of defined specifications;
- causing, by the processor, an optical sensor to scan the printed pattern;
- analyzing, by the processor, a scanned reflectance profile (SRP) of the scanned printed pattern based on:
- determining a first width of at least one space in the scanned printed pattern;
- determining a second width of at least one bar in the scanned printed pattern;
- and
- comparing the determined first width of at least one space with the determined second width of at least one bar to validate the scanned printed pattern according to a pre-defined acceptance criterion;
- and
- recording, by the processor, thermal management settings for the printer.
6 more elements
A printer comprising:
- a printhead;
- an optical system comprising an optical sensor;
- and
- a processor in electronic communication with the optical system and the printhead, wherein the processor is configured to:
- cause the printer to print a test pattern comprising bars and spaces of defined specifications, wherein the defined specifications comprise a first set of bars, a second set of bars, a first set of spaces, and a second set of spaces;
- cause the optical sensor to scan the test pattern;
- and
- analyze the scanned test pattern based on:
- generating a scanned reflectance profile (SRP) of the scanned test pattern;
- measuring a first center position indicative of a first median reflectance value of the first set of bars in the SRP;
- measuring a second center position indicative of a second median reflectance value of the second set of bars in the SRP;
- measuring a third center position indicative of a third median reflectance value of the first set of spaces in the SRP;
- measuring a fourth center position indicative of a fourth median reflectance value of the second set of spaces in the SRP;
- and
- validating the scanned test pattern according to a pre-defined acceptance criterion by:
- comparing the first center position with the second center position;
- and
- comparing the third center position with the fourth center position.
15 more elements
Dependencies are inferred from the claim text.