Method and device for detecting patterns on a substrate
First Claim
1. A device for detecting patterns on a travelling substrate travelling in a travel direction, comprising:
- a housing;
a first source of light issuing a first incidental beam toward the substrate;
a second source of light issuing a second incidental beam toward the substrate;
an optical measuring system, a photosensitive sensor respectively collecting reflected beams from the substrate wherein the optical measuring system is telecentric, the first incidental beam crosses a telecentric lighting system and the second incidental beam crosses an oblique lighting system; and
an electronic unit connected to the sensor and connected to a communication port.
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Accused Products
Abstract
Device for detecting patterns on a travelling substrate, namely on a substrate being deposited on a sheet or on web matter, wherein the substrate is a metallized foil travelling in a travelling direction. The device comprises a housing for a first incidental beam issued from a first source of light, a second incidental beam issued from a second source of light, an optical measuring system, a photosensitive sensor respectively delivering beams reflected from the substrate and an electronic unit connected to a communication port. The optical measuring system is telecentric, the first incidental beam crosses a telecentric lighting system and the second incidental beam crosses an oblique lighting system.
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Citations
8 Claims
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1. A device for detecting patterns on a travelling substrate travelling in a travel direction, comprising:
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a housing; a first source of light issuing a first incidental beam toward the substrate; a second source of light issuing a second incidental beam toward the substrate; an optical measuring system, a photosensitive sensor respectively collecting reflected beams from the substrate wherein the optical measuring system is telecentric, the first incidental beam crosses a telecentric lighting system and the second incidental beam crosses an oblique lighting system; and an electronic unit connected to the sensor and connected to a communication port. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device for detecting patterns on a travelling substrate travelling in a travel direction, comprising:
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a housing; a first source of light issuing a first incidental beam toward the substrate; a second source of light issuing a second incidental beam toward the substrate; a first beam deflector shaped and positioned for deflecting the beam from the first source of light telecentrically on an axis toward the substrate; a second beam deflector shaped and positioned to deflect the beam from the second source of light obliquely of the axis and toward the substrate; a deflection blade positioned for deflecting the reflected light from the substrate, supplied by the first and the second light sources, toward an optical system; an optical measuring system, a photosensitive sensor respectively collecting reflected beams from the substrate wherein the optical measuring system is telecentric, the first incidental beam crosses a telecentric lighting system and the second incidental beam crosses an oblique lighting system; and an electronic unit connected to the sensor and connected to a communication port.
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Specification