| 摘要 |
We describe methods of recording a holographic image onto holographic recording film, film bearing recorded holographic images, and apparatus for recording a holographic image onto film, in particular for security holograms. We thus describe a method of recording a holographic image onto holographic recording film (108), said holographic image comprising a 3D object (102) or a hologram of a three-dimensional (3D) object in conjunction with a multi-channel holographic image (106), the method comprising: forming a holographic recording stack by: positioning said holographic recording film (108) over a multichannel image generation device (106); positioning at least one three-dimensional (3D) object (102) under said multichannel image generation device; and providing a transparent window (106b) in said multichannel image generation device in a region above said at least one object (102); and then recording said holographic image in said holographic recording film by illuminating said stack through said holographic recording film with a laser light (110) of at least one wavelength.
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