| 摘要 |
<p>Colour correction and exposure determn. is for a photographic machine colour printer. The system operates by integrating the three primary colours and determining the filter correction by comparison with a reference. The printer comprises a light source with reflector, condenser and heat filter. There follows three subtractive filters with their respective drive units followed by a mixer box and two diffusers. The negative is placed in a carrier with a lens. A photocell unit and shutter with servo mechanism are located below the lens. The electronic measuring circuitry is digital in operation and connected to the shutter, photo-cell unit and the three subtractive filters.</p> |
