| 摘要 |
The 3-D viewing spectacles have two or more lenses, tinted on the surface or in the mass in different colours. The first lens has a filter layer able to absorb more than 80 per cent of visible light, with the colour yellow virtually completely absorbed. The second lens has a filter layer able to absorb less than 20 per cent of visible light and does not filter yellow. The 3-D viewing spectacles (1) have two or more lenses (8, 9), tinted on the surface or in the mass in different colours. The first lens (8) has a filter layer able to absorb more than 80 per cent of visible light, with the colour yellow virtually completely absorbed. The second lens (9) has a filter layer able to absorb less than 20 per cent of visible light and does not filter yellow. The lenses filter all UVB rays and almost all UVA rays, with the first lens coloured violet - made from red and blue - and the second coloured yellow.
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