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Improvements to the method of producing lens arrays

A lens array and small lens technology, applied in the field of lens arrays, can solve problems such as loss of image contrast and blurring

Inactive Publication Date: 2016-04-27
CCL SECURE PTY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, an arbitrary defocus design of this nature is unsuitable for multiplexed lens imaging or complex moiré effects, as it may produce severe blurring and loss of image contrast

Method used

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  • Improvements to the method of producing lens arrays
  • Improvements to the method of producing lens arrays
  • Improvements to the method of producing lens arrays

Examples

Experimental program
Comparison scheme
Effect test

example

[0166] see Figure 16 , an example of a printed interlaced image 900 is shown here that is used to produce a binary "flip image" effect when paired with a suitable lens array. In the example shown, the image elements are black image elements in the form of stripes 901 interleaved with white image elements in the form of stripes 902 . In this case, the black stripes are formed by black ink printed on a transparent layer or a layer of white ink, such that the white stripes are formed by transparent areas without ink or white ink to which no black ink has been applied. As a device having the lens array in combination with picture elements 901, 902 is tilted relative to the viewer about an axis parallel to the direction of the fringes when viewed through the mirror array of lenses having a plurality of lenticular lenses 930, the device generated from the Figure 16 The transition from image 910 to image 920 shown at the upper left, where the black and white areas are reversed. ...

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PUM

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Abstract

Provided herein are a lens array for imaging a plurality of image elements in an object plane, and a method of manufacturing the lens array. The lens array includes lenslets formed in or on one side of a transparent or translucent material, while the picture elements are placed on the opposite side, and the lens array has a The distance from the apex of the lens to the target plane corresponds to the gauge thickness. Each lenslet has a set of lens parameters. The gauge thickness and / or at least one lens parameter are optimized such that each lenslet has a focal point size in the object plane that is either substantially equal to the size of the image elements or differs from the size of the image elements by a predetermined amount. value.

Description

technical field [0001] The present invention relates to improved methods for designing and manufacturing lens arrays, and to lens arrays produced thereby. Background technique [0002] Lens arrays allow many different types of optical effects to be produced. For example, a lens array focused on multiple basemap elements at its focal plane can produce an overall image that appears three-dimensional, that moves, changes magnification, or distorts with viewing angle, or that has The apparent depth out of the plane of such a lens array. A further effect can be achieved by interleaving two or more images under the lens (for example in a stripe under multiple cylindrical lenses), such that the viewer sees different images depending on the viewing angle. Such visual effects are useful in a variety of applications including displays, promotional materials, collectibles, and as optically variable devices in security documents. [0003] Lens arrays are typically fabricated from tra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B3/00B42D25/29G02B30/27
CPCG02B3/00G02B3/005G02B3/0056B42D25/29B42D25/324H04N13/305B42D25/00G02B3/0006G02B3/0037G02B30/27B42D25/351G02B30/00G02B3/0025G02B27/06G03B25/02G03B5/04B42D25/30G06F30/00G02B3/0012
Inventor 乔纳森·A·莫恩戴维·E·罗伯茨
Owner CCL SECURE PTY LTD