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Optical sensor

A sensor, photodetector technology used in the application field of identifying and/or authenticating objects, which can solve the problems of high cost and slow reading speed

Inactive Publication Date: 2011-08-31
BAYER IP GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Barcodes are easy to copy and forge
RFID chips provide a combination of features for product tracking and anti-counterfeiting, but RFID chips are only of limited use due to their relatively high cost, slow read speed, and susceptibility to interfering electromagnetic fields

Method used

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  • Optical sensor
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Examples

Experimental program
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Embodiment Construction

[0093] Figure 1a and 1b The sensor 1 according to the invention without optics is shown in a perspective view. exist figure 2 shown in cross section from Figure 1a and 1b sensor 1.

[0094] The central element of the sensor 1 forms a block 10, which is preferably implemented in one or two pieces and serves to house all the optical components of the sensor according to the invention.

[0095] Optical components are to be understood as meaning all components of the sensor which are arranged in the beam path between the beam source and the photodetector, including the laser and the photodiode itself. Optics constitute a selection of optical components; these optics are used for beam forming and focusing. In particular lenses, apertures, diffractive optical elements etc. are referred to as optical elements.

[0096] Optical block 10 includes an exposed outer surface 18 that is oriented toward an object when detecting a characteristic reflection pattern of the object. Th...

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PUM

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Abstract

The invention relates to an optical sensor for detecting characteristic reflection patterns caused by randomly distributed and / or oriented microreflectors. The invention further relates to the use of a sensor according to the invention for identifying and / or authenticating objects.

Description

technical field [0001] The invention relates to an optical sensor for detecting characteristic reflection patterns caused by randomly distributed and / or oriented microreflectors. Furthermore, the invention relates to a use of the sensor according to the invention for identifying and / or authenticating objects. Background technique [0002] Documents, banknotes, products etc. are nowadays equipped with elements for counterfeiting that can only be copied with expertise and / or high technical effort. Such elements are referred to herein as security elements. The security element is preferably inseparably connected to the object to be secured. Attempts to separate the security element from the object preferably result in damage to the security element, whereby the security element cannot be misused. [0003] The authenticity of the object can be checked based on the presence of one or more security elements. [0004] Optical security elements - such as watermarks, specialty in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07D7/12
CPCB42D2035/22B42D2035/50B42D25/328B42D15/105G06K19/086B42D15/0013G07D7/121B42D25/29G01J1/10G07D7/12G01N21/00
Inventor M·格里希克A·巴克尔T·比尔策恩R·伊姆豪伊泽C·罗特W·斯佩特S·福吉奥卡斯
Owner BAYER IP GMBH