Chart viewer
OwnerGeorge E. Daneinventor
Life of this patent
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Abstract
A device to be used in a darkened cockpit of an aircraft and the like in night flying or driving conditions for supporting in the device a chart treated with a fluorescent material, the device including an ultraviolet light source, means for directing the ultraviolet light energy from the source to the upper surface of the chart causing it to glow, and a filter disposed above the chart at the upper portion of the device which allows the fluorescent glow to be viewed therethrough while preventing glare-producing light rays from leaving the device.
Claims20
A chart viewing device for viewing in a darkened environment printed matter that has been at least partially treated with a long wave ultraviolet-sensitive fluorescent material, comprising:
- a housing having an upper portion and a lower chart-supporting portion viewable from above said upper portion of said housing;
- illumination means including a long wave ultraviolet light source disposed in said housing for illuminating the upper surface of said chart-supporting portion of said housing;
- and
- filter means including a U-V filter mounted at the top of said upper portion of said housing for allowing the viewing of long wave ultraviolet light-stimulated fluorescent light produced within said housing, and for essentially preventing the transmission therethrough of ultraviolet light energy.
A viewing device for viewing in a darkened environment objects that have been at least partially treated with a long wave ultraviolet-sensitive fluorescent material, comprising:
- a housing having an outer viewing portion;
- illumination means including at least one long wave ultraviolet light source disposed in said housing for illuminating an object at least partially treated with a long wave ultraviolet-sensitive fluorescent material which gives off a fluorescent light when so stimulated;
- filter means including an ultraviolet filter mounted in said outer viewing portion of said housing for allowing the viewing of the long wave ultraviolet light-stimulated fluorescent light produced within said housing, and for essentially preventing the transmission therethrough of ultraviolet light energy.
Dependencies are inferred from the claim text.