Variable focal power lens combined by two optical elements and application thereof
一种光学元件、光焦度的技术,应用在晶状体领域,能够解决丧失眼睛天然调节功能等问题,达到改变光学特性的效果
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[0023] First, the principles on which these inventions are based will be explained. Figure 1 shows two optical elements 1, 2 with specific optical surfaces 3, 4 which are laterally movable, which produces a variable optical power over the central area where the optical elements 1, 2 overlap. lens. This principle is described in US-A-3 305 294 .
[0024] This lens effect is achieved by "saddle" surfaces 3, 4 on one or both sides of the optical elements 1, 2, which is a well known principle. However, it is also possible to use diffractive structures or diffraction gratings, eg according to the GRIN principle. Here, flat optical elements comprising materials with different refractive indices are used. Although it is now envisaged that the optical elements 1 , 2 translate relative to each other, the elements can also be designed such that a lens effect is achieved by rotation of the optical elements 1 , 2 relative to each other. There may or may not be a connection between the...
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