| 摘要 |
A recording of the object (17) may be made by successively increasing wavelengths or simultaneously at the different wavelength sun a single layer photosensitive support (18), where three wavelengths are used, 488nm, 532nm and 610 nm may be selected. A reflector (9) is placed in the bram of each of the sources (5-7) in turn to send the beams along the common path (16). Alternatively, one reflector and two partial reflectors and transmitters enable three simultaneously beams. Fibre optic cables may be used with a pair of two-input couplers two produce a single beam in an optical fibre directed towards the object.
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