1. A multiple band visible light reflector, comprising:
a substrate;
a stack disposed on said substrate or on one or more intervening layers that are disposed on said substrate, wherein said stack comprises:
a first metal layer disposed in contact with said substrate;
a first dielectric layer disposed in contact with said first metal layer;
a second metal layer disposed in contact with said first dielectric layer;
a second dielectric layer disposed in contact with said second metal layer;
a third metal layer disposed in contact with said second dielectric layer;
a third dielectric layer disposed in contact with said third metal layer;
a fourth metal layer disposed in contact with said third dielectric layer; and,
a fourth dielectric layer disposed in contact with said fourth metal layer;
wherein said first dielectric layer and said second dielectric layer have a difference in thickness of at least 6 percent optical thickness;
wherein each of said first dielectric layer, said second dielectric layer, said third dielectric layer, and said fourth dielectric layer has a thickness of 40 to 100 nanometers;
wherein said reflector reflects light over the visible spectrum in at least two reflection peaks, wherein the intensity of each reflection peak is at least 45% of incident light at the same wavelength as said each reflection peak and the intensity of valleys between said reflection peaks are no more than 50% of the average intensities of said reflection peaks; and,
wherein said stack has a thickness of less than 0.5 microns.
2. The reflector of claim 1, wherein said substrate is transparent and flexible.
3. The reflector of claim 1, wherein said substrate is poly(ethylene terephthalate).
4. The reflector of claim 1, wherein said substrate has a metallized surface disposed in contact with said first metal layer.
5. The reflector of claim 4, wherein said metallized surface comprises chromium or aluminum having a thickness of at least 40 nanometers.
6. The reflector of claim 1, wherein said reflector absorbs any visible light that is not reflected.
7. The reflector of claim 1, wherein a portion of any visible light that is not reflected is transmitted.
8. The reflector of claim 1, wherein said first metal layer and said second metal layer each comprise silver.
9. The reflector of claim 1, wherein said first metal layer has a thickness of 15 to 60 nanometers.
10. The reflector of claim 1, wherein said second metal layer has a thickness of 15 to 60 nanometers.
11. The reflector of claim 1, wherein said first dielectric layer and said second dielectric layer have an optical thickness difference of at least 8%.
12. The reflector of claim 1, wherein said first dielectric layer and said second dielectric layer have an optical thickness difference of at least 10%.
13. The reflector of claim 1, wherein said first dielectric layer and said second dielectric layer comprise the same material.
14. The reflector of claim 1, wherein said first dielectric layer and said second dielectric layer comprise different materials.
15. The reflector of claim 1, wherein said first dielectric layer comprises TiO2, Nb2O5, MgF2, Ta2O5, SiO2,In2O3, SnO2, or Indium Tin Oxide, and said second dielectric layer comprises TiO2, Nb2O5, MgF2, Ta2O5, SiO2, In2O3, SnO2, or Indium Tin Oxide.
16. The reflector of claim 1, wherein said first dielectric layer comprises TiO2, Nb2O5, or SiO2 and said second dielectric layer comprises TiO2, Nb2O5, or SiO2.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. An indoor skiing ground comprising:
a ski slope with a predetermined inclination on which skiers go downhill;
a wall for surrounding said ski slope to cut off atmosphere on said ski slope from outer atmosphere;
a plurality of spray nozzles, arranged at the inner side of said wall, for generating a plurality of screens of mist, each having a predetermined shape, at upper portions of said ski slope; and
a plurality of projectors, arranged at the inner side of said wall, for projecting predetermined images on said screens of mist to be shown to said skiers.
2. The indoor skiing ground according to claim 1, wherein said plurality of spray nozzles are continuously arranged along a predetermined direction to generate the curtain-like screens of mist.
3. The indoor skiing ground according to claim 2, wherein said spray nozzles are continuously arranged along a width direction of said ski slope to generate the curtain-like screens of mist extending along said width direction, and said spray nozzles are arranged at given intervals in a downhill direction of said ski slope to form said curtain-like screens of mist in said inclination direction.
4. The indoor skiing ground according to claim 3, wherein said projectors are provided at given intervals along the inclination direction of said ski slope to project said image on each of said plurality of curtain-like screens of mist.
5. The indoor skiing ground according to claim 4, further comprising control means for selectively operating said plurality of spray nozzles and said plurality of said projectors, wherein said control means operates said spray nozzles and said projectors in accordance with a control pattern prepared depending on a predetermined scene.
6. The indoor skiing ground according to claim 5, wherein said control means controls the operation of said spray nozzles or said projectors, or both in synchronization with downhill speed of the skiers.
7. The indoor skiing ground according to claim 1, wherein the inner surface of said wall that surrounds said ski slope is formed to have a semicircular shape extending from one side portion to the other side portion, and a landscape that imitates sky is painted on the inner surface.
8. The indoor skiing ground according to claim 7, further comprising illuminators for illuminating the landscape on the inner surface of the wall and illuminators for illuminating the surface of the ski slope, separately.
9. The indoor skiing ground according to claim 8, wherein the landscape painted on the inner surface of said wall includes objects painted with fluorescent paint, said illuminators for illuminating said landscape are provided such that normal light and near-ultraviolet light for emitting the objects painted with fluorescent paint are changeable.
10. The indoor skiing ground according to claim 8, wherein said illuminators for illuminating the surface of said ski slope includes illuminators for daytime, which are used together with normal light with which said landscape is illuminated at the time of representing daytime, and illuminators for night, which are used in a state in which said normal light is turned off or weakened at the time of representing night.
11. An indoor skiing ground comprising:
a ski slope with a predetermined inclination on which skiers go downhill; and
a wall for surrounding said ski slope to cut off atmosphere on said ski slope from outer atmosphere, wherein the inner surface of said wall that surrounds said ski slope is formed to have a semicircular shape extending from one side portion to the other side portion, and a landscape that imitates sky is painted on the inner surface.
12. The indoor skiing ground according to claim 11, further comprising illuminators for illuminating the landscape on the inner surface of the wall and illuminators for illuminating the surface of the ski slope, separately.
13. The indoor skiing ground according to claim 12, wherein the landscape painted on the inner surface of said wall includes objects painted with fluorescent paint, said illuminators for illuminating said landscape are provided such that normal light and near-ultraviolet light for emitting the objects painted with fluorescent paint are changeable.
14. The indoor skiing ground according to claim 12, wherein said illuminators for illuminating the surface of said ski slope includes illuminators for daytime, which are used together with normal light with which said landscape is illuminated at the time of representing daytime, and illuminators for night, which are used in a state in which said normal light is turned off or weakened at the time of representing night.