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US 7,803,454 B2Granted
Laser test card
AssigneeZap-It Corp., Inc.
InventorMichael P. Toepel
Life of this patent
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Abstract
A laser test card according to the present invention comprising a thin planar multi-layer material, which may be cut to a desired length and width, is exposed to a beam directed to the laser test card top surface from a laser under test, and reveals successive visibly contrasting layers under the top surface according to the incident laser beam energy at that particular point or any point of the X or Y dimension (cross-section) of the beam. In the preferred embodiment, several different layers of sharply different colors are used.
Claims12
A laser test card, comprising:
- a support board;
- a plurality of laser responsive layers disposed successively on said support board, wherein, each said layer comprises ink reduced in thickness and ultimately removed upon receipt of incident laser energy, revealing a succession of deeper, underlying layers according to incident laser energy received thereon;
- and
- a clear ink separation barrier between at least two of said of said layers, wherein said incident laser energy passes through said clear ink separation barrier and continues to reduce the thickness of the laser responsive layers disposed underneath said clear ink separation barrier.
1 more element
Dependencies are inferred from the claim text.