Holographic film with first and second translucent photosensitive recording layers

A method of recording a multicolour image into a volume hologram in a holographic film, the method comprising:

• providing a carrier;
• providing a first photosensitive recording layer sensitive to one or both of red and green laser light;
• providing a second photosensitive recording layer sensitive to blue laser light;
• wherein the first and second photosensitive recording layers each are translucent or transparent to said blue laser light and said one or both of red and green laser light to allow fringe structures defined by phase modulation to be recorded independently in said first and second photosensitive recording layers;
• and
• recording a first fringe structure defined by phase modulation in said first photosensitive recording layer using one or both of said red and green laser light;
• and
• recording a second fringe structure defined by phase modulation in said second photosensitive recording layer using said blue laser light;
• wherein the colour components of said multicolour image are recorded simultaneously by simultaneously illuminating the film with said blue laser light and said one or both of said red and green laser light.

A method of manufacturing the holographic film for recording a multicolor volume hologram, the method comprising:

• providing a carrier;
• depositing onto said carrier a first photosensitive recording layer sensitive to one or both of red and green laser light;
• and
• depositing onto said carrier a second photosensitive recording layer sensitive to blue laser light;
• wherein the first and second photosensitive recording layers each are translucent or transparent to said blue laser light and said one or both of red and green laser light to allow fringe structures defined by phase modulation to be recorded independently in said first and second photosensitive recording layers.