| 摘要 |
The viewer consists of an optical selector (10) made from a transparent screen with its rear face covered with a network of convergent lenses (16), and a support for the coded image (18), set at a distance from and facing towards the back of the transparent screen. The screen comprises a panel (42) of glass or a transparent plastic, e.g. PMMA, with a moulded polymer coating (44), e.g. of silicone, on its rear face forming the convergent lenses. The support comprises a transparent front plate (20) and a rear supporting plate (38) with the coded image (18) between the two. Both the optical selector and the support are fitted into a rigid frame. |
