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Optically active materials and articles and systems in which they may be used

An optical activity and product technology, applied in optics, optical components, thin material processing, etc., can solve problems such as difficulty in accurately reading license plates

Inactive Publication Date: 2015-06-24
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the wide variety of license plates on the road today, accurate reading of license plates is becoming increasingly difficult

Method used

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  • Optically active materials and articles and systems in which they may be used
  • Optically active materials and articles and systems in which they may be used
  • Optically active materials and articles and systems in which they may be used

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0039]Utilizing thermal mass transfer technology, described in U.S. Patent Nos. 6,712,532 (Look), No. 6,246,428 (Look et al), No. On the digital license plate system described above, a roll of white reflective sheeting embedded with security features and coated with a pressure sensitive adhesive on the back is printed, which is manufactured by 3M Company (Minnesota) under the name "Digital License Plate (DLP) Sheet Material Series 9250T" (Digital License Plate (DLP) Sheeting Series 9250T) with "Ensure TM Virtual Security Thread” (Ensure TM Virtual Security Thread). The printed pattern is formed as Figures 1 to 3 The rolling hills background graphic shown in 68. In this example, the upper portion of the license plate is horizontally centered with the words "Tennessee" 60 and "The Volunteer State" 62 in smaller letters above the words "Tennessee". The printed sheet was then laminated with "Clear Protective Film 9097" film sold by 3M Company.

[0040] The printed reflectiv...

example 2

[0047] A license plate was provided as described in Example 1, except that (1) the background graphic was a wooded lake view; (2) "Explore Minnesota" was printed on the upper part of the license plate; and (3) "Wannsee State" (10,000 Lakes) is printed on the lower part of the license plate. In the approximate center of the license plate, the alphanumeric characters "NSTIG8R" are printed in the approximate center of the license plate. Figure 4 is a schematic diagram of the license plate.

[0048] In this example, the indicia was formed by centering three 0.5 inch by 0.5 inch (1.3 cm by 1.3 cm) square pieces of "Vikuiti Clear Card Filter" multilayer film perpendicular to the right side of the license plate. The square marker was secured to the license plate by the pressure sensitive adhesive tape of Example 1 and applied using hand pressure.

[0049] License plate images were captured under near-infrared light conditions using a "DSC-S85" digital camera manufactured and sold ...

example 3

[0052] A license plate as described in Example 1 was provided, except that the white reflective sheet had not been printed. Markings were sequentially formed and vertically centered on the license plate: (1) the first mark formed of commercially available multilayer infrared reflective film "CM 875" was placed on the license plate in a radial barcode shape; The second mark formed by selling multi-layer infrared reflective film "Solar Reflecting Film" (Solar Reflecting Film) is set on the license plate in the shape of the letters "I" and "R"; and (3) the third mark is set in the shape of the letter "T" Adhesion to the license plate was made by "Scotch Magic Tape", a commercially available visible light clear pressure sensitive adhesive tape sold by 3M Company. Figure 6 is a schematic diagram of the license plate.

[0053] A rectangular polyethylene terephthalate (PET) film having dimensions of 6 inches by 12 inches (15.2 cm by 30.5 cm) is placed over the license plate and the...

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Abstract

The inventors of the present application developed novel optically active materials, methods, and articles. One embodiment of the present application is an optically active article, comprising: an infrared-reflecting material positioned adjacent to an optically active substrate such that the infrared-reflecting material forms a pattern that can be read by an infrared sensor when the optically active substrate is illuminated by an infrared light source. Another embodiment of the present application relates to a method of manufacturing an optically active article, comprising: obtaining an optically active sheeting; and positioning an infrared-reflecting material on the optically active sheeting to form a pattern. The optically active article may be, for example, a license plate.

Description

technical field [0001] This patent application relates generally to novel optically active articles; methods of making and using such articles; and systems for which the articles are useful. Background technique [0002] Ideally, license plates should have an overall similar style or appearance to enable quick identification of license plates issued by different licensing agencies and to prevent counterfeiting. At the same time, license plates should provide each vehicle, each state, or each driver with a different, personalized, and unique identification number or image. Many licensing agencies offer "personalized" license plates for this purpose. Such plates allow drivers to choose an attractive or meaningful design that will be printed on their plates. The result of such "personalized" license plates is that states offer their constituents a multitude of different license plate designs. [0003] The increase in these personalized license plates has been significant. F...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R13/10C09D5/33G06V10/143
CPCG02B5/0816G02B5/128B60R13/10Y10T156/10Y10T428/24802G06V10/143G02B5/04G02B5/124G06V20/625G02B5/136G02B5/208G02B5/26G09F13/16
Inventor 罗伯特·L·W·史密森罗尔夫·W·比尔纳特
Owner 3M INNOVATIVE PROPERTIES CO