Method for recording data in a holographic form on a lens and a corresponding lens

Abstract

The inventive method for recording data on an optical lens (2) consists in recording a data-containing source image, in generating the hologram (3) of the image source and in recording said hologram on the lens surface portion ranging from 0.5 mm<2> to 15 mm<2>. The data can be readout by illuminating said lens by means of a light beam (101) in the hologram area. A read-out image (105, 106) which reproduces the source image and on which data is readable is formed at a distance from the lens. Said lens can be embodied, in particular in the form of an ophthalmic lens.

Description

technical field

[0001] The present invention relates to a method of writing data onto an optical lens, and to an optical lens including the data written thereon. Background technique

[0002] It is known to form holograms on optical lenses for a decorative effect. For example documents US5892600 and DE19644620A1 describe an optical lens with a hologram on its surface which is reconfigurable in the near field, which provides a decorative function which is combined with a marking effect in DE19644620A1. Document WO 01 / 23921 A1 discloses an optical lens having on its surface a set of holograms reconfigurable in the far field, which provide a decorative function.

[0003] In the present invention, the purpose of writing the hologram on the lens is to record relevant data for its production or use, without changing its use as an optical lens.

[0004] It is difficult to write data to optical lenses without hindering their use. This is because the lenses are transparent and dat...

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