Spectacle lens structure with a planar reflective outer surface

Details Spectacle lens structure with a planar reflective outer surface Spectacle lens structure with a planar reflective outer surface

1996-12-27

1999-04-06

Spyrou, Cassandra

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 32, 351 51, 351 44, G02B 532

Patent

active

058926003

ABSTRACT:
A spectacle lens structure includes a light transmitting base plate having a serrated surface defining a hologram. A thin reflective coating having a planar outer surface is provided on the serrated surface to partially reflect an incident light and allow the remaining portion of the incident light to penetrate and diffract about the serration for the formation of the holographic image. The reflective coating may be of a refractive index quite different from that of the base plate so as to provide a brazed 3-D image. If the reflective coating is made of a material having a refractive index close to the base plate, then a further coating having a high refractive index, such as ZnS, has to be provided on the reflective coating to provide a brazed 3-D image.

REFERENCES:
patent: 3623798 (1971-11-01), Sheridon
patent: 4315665 (1982-02-01), Haines
patent: 5513019 (1996-04-01), Cueli

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