Color-picture analyzing apparatus with red-purpose and green-purpose filters
AssigneeSharp Kabushiki Kaisha
InventorFumikazu Nagano
Life of this patent
Estimating the term…
Abstract
A color-picture reading apparatus comprises blue, red-purpose, and green-purpose fluorescent lamps, a red filter in front of the red-purpose lamp for solely passing the red radiation, a green filter in front of the green-purpose lamp for solely passing the green radiation, and a circuit for subsequently switching on and off the three lamps. Both the red filter and the green filter comprise a first filter for filtering the short wavelength radiation and a second filter for cutting the long wavelength radiation. The first filter is a glass filter and the second filter is an interference filter. All of the three lamps have a short afterglow time.
Claims5
A color picture analyzing apparatus comprising:
- first lamp means for propagating blue spectral radiation toward said color picture;
- second lamp means for directing spectral radiation inclusive of red radiation toward said color picture;
- third lamp means for directing spectral radiation inclusive of green radiation toward said color picture;
- red filter means for solely passing the red radiation, said red filter means being positioned between the second lamp means and the color picture, said red filter means comprising a first glass filter for cutting the short wavelength radiation and a first interference filter for cutting the long wavelength radiation;
- green filter means for solely passing the green radiation, said green filter means being positioned between the third lamp means and the color picture, said green filter means comprising a second glass filter for cutting the short wavelength radiation and a second interference filter for cutting the long wavelength radiation;
- and
- means for subsequently switching on and off said three lamp means.
Dependencies are inferred from the claim text.