Daylight photoplotting and film therefor

A method for plotting color images comprising the steps of:

• providing a color film having a photosensitive surface and a plurality of emulsion layers below the surface, each emulsion layer being sensitive only to predetermined wavelengths of non-visible radiant energy, the predetermined wavelengths of each emulsion being different from the predetermined wavelengths of the other emulsions, and each emulsion manifesting a distinguishable color when sensitized locations of the film are developed,
• generating a beam of non-visible radiant energy, the non-visible radiant energy within the beam including wavelengths capable of sensitizing at least one of the emulsion layers of the film to manifest a particular color when the film is developed,
• projecting the beam of non-visible radiant energy onto a spot on the surface of the color film while the film is exposed to daylight,
• moving the beam of non-visible radiant energy and the color film relative to one another to cause the spot to move to different locations on the film surface to sensitize the emulsion layers at different locations according to the desired plot of a particular color,
• generating another beam of non-visible radiant energy, the non-visible radiant energy within the beam having wavelengths capable of sensitizing at least another of the emulsion layers to manifest a color different from said particular color upon development,
• projecting the other beam onto a spot on the surface of the color film while the film is exposed to daylight, and
• moving the other beam of radiant energy and the color film relative to one another to cause the spot to move to different locations on the film surface to sensitize the other emulsion layer at different locations according to the desired plot of another color.

A method for plotting color images comprising the steps of:

• providing a color film having a photosensitive surface and a plurality of emulsion layers below the surface, each emulsion layer being sensitive only to predetermined wavelengths of non-visible radiant energy, the predetermined wavelengths of each emulsion being different from the predetermined wavelengths of the other emulsions, and each emulsion manifesting a distinguishable color different from the other emulsions when sensitized locations of the film are developed,
• generating a beam of non-visible radiant energy, the non-visible radiant energy within the beam having wavelengths capable of sensitizing all of the emulsion layers,
• projecting the beam onto a spot on the surface of the color film in visible light without shielding the visible light from the photosensitive surface of the color film;
• filtering all but one group of wavelengths corresponding to a particular color from the beam to cause the emulsion layers to be sensitized by the filtered beam and rendered capable of manifesting the particular color upon development,
• moving the filtered beam of non-visible radiant energy and the color film relative to one another to cause the spot to move to different locations on the film surface and sensitize the emulsion layers at different locations according to the desired plot of a particular colored image, and
• developing the film to form color dye in the emulsion layers at the sensitized locations and thereby produce a visible plot in color.

A method for plotting color images comprising the steps of:

• illuminating a photoplotter and film with radiant energy having wavelengths within the visible spectrum to which the film is insensitive,
• exposing plural film emulsions by generating beams of radiant energy having wavelengths within plural bands outside the visible spectrum and to which bands the emulsions are respectively sensitive to record color images, and
• moving the respective beams relative to the film to expose the film emulsions in selected locations with different colors, and
• developing the sensitized film to produce a colored image in the visible spectrum.

An apparatus for recording color images comprising:

• a color film including a sheet material and a plurality of emulsion layers in overlying relationship superimposed on and adhering to the sheet material, each emulsion layer sensitive only to exposure by predetermined wavelengths of non-visible radiant energy, the predetermined wavelengths of each emulsion being different from the predetermined wavelengths of the other emulsions, and each emulsion layer being developable to manifest a distinguishable color different from the other emulsion layers upon exposure to sensitizing radiant energy,
• a support surface on which the color film is spread without shielding from visible radiant energy,
• a source of non-visible radiant energy, the radiant energy including wavelengths to which a plurality of the emulsion layers of the color film are sensitive,
• means for projecting the radiant energy emitted from the source along a beam axis and onto a spot on the film surface,
• support means for supporting the radiant energy source and the projecting means so that the beam axis is generally perpendicular to the support surface,
• means for moving the film and spot relative to one another to expose locations on the film in accordance with a desired plot;
• and
• filtering means supported along the beam axis for selectively filtering from the beam wavelengths other than those to which a particular emulsion is sensitive so that the emulsion layers can be individually sensitized at selected locations by the filtered beam and rendered capable of manifesting a particular color upon development.