Labeling methods and apparatus using energy of two wavelengths

Details Labeling methods and apparatus using energy of two wavelengths Labeling methods and apparatus using energy of two wavelengths

2011-03-29

2011-03-29

Pham, Hai C (Department: 2861)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

C347S251000

Reexamination Certificate

active

07916164

ABSTRACT:
A method of measuring a relative darkness of an image recorded on a recording medium, comprising: applying first electromagnetic energy having a first wavelength to the recording medium to record an image thereon, applying second electromagnetic energy having a second wavelength different from the first wavelength to the recorded image on the recording medium, and measuring a reflection of the second electromagnetic energy from the recorded image to determine the relative darkness of the recorded image.

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PCT Search Report dated Mar. 31, 2006, 3 pages.
Taiwan office action dated Sep. 4, 2006 with English translation, for Taiwan patent app. No. 94138101, (5 pages).

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