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Device for shielding holographic text in detected object

A detection object and detection technology, applied in the field of holographic imaging

Active Publication Date: 2015-08-05
ZHONGCHAO SPECIAL SECURITY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the influence of holographic text, it is very difficult to obtain non-holographic content printed on the surface of holographic text, or to detect the printing quality of non-holographic content.

Method used

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  • Device for shielding holographic text in detected object
  • Device for shielding holographic text in detected object
  • Device for shielding holographic text in detected object

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Experimental program
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Embodiment Construction

[0021] The embodiments according to the present application will be described in detail below with reference to the drawings.

[0022] Generally, holograms can include different types of holographic texts, such as background parts and pattern parts. The raster lines of the pattern and the raster lines of the background are usually perpendicular to each other.

[0023] In this embodiment, the hologram includes two types of hologram text, namely, the background part and the pattern part. Those skilled in the art can understand that the hologram can also include more than three types of hologram text. For the sake of simplicity In this embodiment, only the background part and the pattern part are taken as examples.

[0024] According to an embodiment of the present application, the device for shielding the holographic text in the object to be inspected includes two light sources, one of which provides light for highlighting the holographic content composed of grating lines in the backg...

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PUM

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Abstract

The invention provides a device for shielding a holographic image-text in a detected object. The holographic image-text includes first grid strokes and second grid strokes which mutually intersect. The device comprises a first light source and a second light source, wherein the first light source is used for providing beams for highlighting and displaying holographic contents composed of the first grid strokes, so as to shield the holographic contents composed of the first grid strokes; and the second light source is used for providing beams for highlighting and displaying holographic contents composed of the second grid strokes, so as to shield the holographic contents composed of the second grid strokes.

Description

Technical field [0001] This application relates to holographic imaging technology, and in particular to a device for shielding holographic graphics to obtain non-holographic content. Background technique [0002] The imaging principle of holograms is well known. A number of parallel diffraction grating lines are formed on the surface of the hologram. When the hologram is illuminated, the diffraction grating lines reflect and diffract the illuminated light to produce a colorful effect. The irradiation direction of the light has a great influence on the imaging effect of the hologram. The content of the hologram includes images, text, etc. If the light is incident from an angle perpendicular to the grating line, a clear hologram text can be produced. Observed from different angles, different colors will be seen; and if the light is parallel to When the grating line is incident at an angle, the holographic image cannot be produced, and the holographic image will become completely...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/84
Inventor 陈斌廖世鹏王继红田子纯张绍兵丁世杰
Owner ZHONGCHAO SPECIAL SECURITY TECH