Projection system and method comprising a fluorescence projection screen and a radiation source which can emit in the non-visible spectrum
First Claim
1. A projection system, comprising:
- a radiation source for producing electromagnetic radiation outside a visible wavelength region;
an imaging unit irradiated by the radiation source;
a projection screen having a radiation-sensitive surface capable of emitting fluorescent light in the visible wavelength region upon being excited by the electromagnetic radiation outside the visible wavelength region; and
wherein the radiation-sensitive surface is formed of a material which, irrespective of a position, emits fluorescent light of different wavelengths according to a wavelength of the excitation radiation, and wherein the radiation source emits excitation radiation of different wavelengths.
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Abstract
A projection system and method are provided, the system includes a radiation source for generating electromagnetic radiation outside the visible wavelength range, an imaging unit, which can be irradiated by the radiation source, and a projection screen having a radiation-sensitive surface which, when excited by means of the above-mentioned invisible radiation, can emit fluorescent light in the visible wavelength range. The radiation-sensitive surface is formed of a material which, irrespective of the position, emits fluorescent light of different wavelengths as a function of the wavelength of the excitation radiation, and the radiation source can emit excitation radiation of different wavelengths.
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Citations
19 Claims
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1. A projection system, comprising:
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a radiation source for producing electromagnetic radiation outside a visible wavelength region;
an imaging unit irradiated by the radiation source;
a projection screen having a radiation-sensitive surface capable of emitting fluorescent light in the visible wavelength region upon being excited by the electromagnetic radiation outside the visible wavelength region; and
wherein the radiation-sensitive surface is formed of a material which, irrespective of a position, emits fluorescent light of different wavelengths according to a wavelength of the excitation radiation, and wherein the radiation source emits excitation radiation of different wavelengths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for projecting information on a projection screen having a radiation-sensitive surface irradiated by a radiation source via an imaging unit, the method comprising the acts of:
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utilizing electromagnetic radiation outside of a visible wavelength region to irradiate the projection screen, wherein the radiation-sensitive surface of the projection screen, irrespective of a position, emits fluorescent light of different wavelengths in a visible wavelength region according to a wavelength of the excitation radiation; and
varying the wavelength of the excitation radiation outside the visible wavelength region to emit the fluorescent light of the different wavelengths.
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Specification