Full-color hologram and methd of producing the same
AssigneeDai Nippon Printing Co., Ltd.
InventorsEmi Takabayashi, Kenji Ueda, Masachika Watanabe, Tsuyoshi Kashiwagi
Life of this patent
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Abstract
A full-color hologram capable of generating a bright image and reproducing colors in all color regions is formed by multiple recording or multilayer recording with four different dominant wavelengths for reconstruction. The full-color hologram has one reconstruction wavelength in the vicinity of the peak wavelength 555 nm of the spectral luminous efficiency curve, i.e. in the range of 550 nm to 560 nm, and further has three other reconstruction wavelengths in the three primary color regions of red, blue and green, i.e. in the three regions of 615 nm to 680 nm, 380 nm to 470 nm, and 485 nm to 515 nm, respectively.
Claims9
A full-color hologram formed by multiple recording or multilayer recording with four different dominant wavelengths for reconstruction, said full-color hologram having one reconstruction wavelength in a vicinity of a peak wavelength 555 nm of a spectral luminous efficiency curve, i.e. in a range of 550 nm to 560 nm, and further having three other reconstruction wavelengths in three primary color regions of red, blue and green, i.e. in three regions of 615 nm to 680 nm, 380 nm to 470 nm, and 485 nm to 515 nm, respectively.
A method of producing a full-color hologram, said full-color hologram being formed by multiple recording or multilayer recording with four different dominant wavelengths for reconstruction, and said full-color hologram having one reconstruction wavelength in a vicinity of a peak wavelength 555 nm of a spectral luminous efficiency curve, i.e. in a range of 550 nm to 560 nm, and further having three other reconstruction wavelengths in three primary color regions of red, blue and green, i.e. in three regions of 615 nm to 680 nm, 380 nm to 470 nm, and 485 nm to 515 nm, respectively,
- wherein as one recording wavelength in the green region, 514.5 nm from an argon laser or 532 nm from an LD pumped laser is used, and as another recording wavelength in the green region, a wavelength not shorter than 555 nm is used.
A method of producing a full-color hologram, said full-color hologram being formed by multiple recording or multilayer recording with four different dominant wavelengths for reconstruction, said full-color hologram having one reconstruction wavelength in a vicinity of a peak wavelength 555 nm of a spectral luminous efficiency curve, i.e. in a range of 550 nm to 560 nm, and further having three other reconstruction wavelengths in three primary color regions of red, blue and green, i.e. in three regions of 615 nm to 680 nm, 380 nm to 470 nm, and 485 nm to 515 nm, respectively, and said full-color hologram being made by holographic duplication from a hologram original plate,
- wherein said hologram original plate is formed from a stack of four layers of photosensitive material, each layer containing a hologram recorded for each corresponding wavelength.
A method of producing a full-color hologram, said full-color hologram being formed by multiple recording or multilayer recording with four different dominant wavelengths for reconstruction, said full-color hologram having one reconstruction wavelength in a vicinity of a peak wavelength 555 nm of a spectral luminous efficiency curve, i.e. in a range of 550 nm to 560 nm, and further having three other reconstruction wavelengths in three primary color regions of red, blue and green, i.e. in three regions of 615 nm to 680 nm, 380 nm to 470 nm, and 485 nm to 515 nm, respectively, and said full-color hologram being made by holographic duplication from a hologram original plate,
- wherein said hologram original plate is formed by:
- recording a wavelength in the red region and one wavelength in the green region in a same layer of photosensitive material;
- recording a wavelength in the blue region and another wavelength in the green region in another same layer of photosensitive material;
- and
- stacking the two layers on top of each other.
A method of producing a full-color hologram, said full-color hologram being formed by multiple recording or multilayer recording with four different dominant wavelengths for reconstruction, said full-color hologram having one reconstruction wavelength in a vicinity of a peak wavelength 555 nm of a spectral luminous efficiency curve, i.e. in a range of 550 nm to 560 nm, and further having three other reconstruction wavelengths in three primary color regions of red, blue and green, i.e. in three regions of 615 nm to 680 nm, 380 nm to 470 nm, and 485 nm to 515 nm, respectively, and said full-color hologram being made by holographic duplication from a hologram original plate,
- wherein said hologram original plate is formed by:
- recording a wavelength in the red region in a layer of photosensitive material;
- recording two wavelengths in the green region in a same layer of photosensitive material that is different from the layer in which the wavelength in the red region has been recorded;
- recording a wavelength in the blue region in a layer of photosensitive material that is different from the former two layers;
- and
- stacking the three layers on top of each other.
A method of producing a full-color hologram, said full-color hologram being formed by multiple recording or multilayer recording with four different dominant wavelengths for reconstruction, said full-color hologram having one reconstruction wavelength in a vicinity of a peak wavelength 555 nm of a spectral luminous efficiency curve, i.e. in a range of 550 nm to 560 nm, and further having three other reconstruction wavelengths in three primary color regions of red, blue and green, i.e. in three regions of 615 nm to 680 nm, 380 nm to 470 nm, and 485 nm to 515 nm, respectively, and said full-color hologram being made by holographic duplication from a hologram original plate,
- wherein said hologram original plate is formed by:
- recording a wavelength in the red region in a layer of photosensitive material;
- recording one wavelength in the green region in a layer of photosensitive material that is different from the layer in which the wavelength in the red region has been recorded;
- recording another wavelength in the green region and a wavelength in the blue region in a same layer of photosensitive material that is different from the former two layers;
- and
- stacking the three layers on top of each other.
A method of producing a full-color hologram, said full-color hologram being formed by multiple recording or multilayer recording with four different dominant wavelengths for reconstruction, said full-color hologram having one reconstruction wavelength in a vicinity of a peak wavelength 555 nm of a spectral luminous efficiency curve, i.e. in a range of 550 nm to 560 nm, and further having three other reconstruction wavelengths in three primary color regions of red, blue and green, i.e. in three regions of 615 nm to 680 nm, 380 nm to 470 nm, and 485 nm to 515 nm, respectively, and said full-color hologram being made by holographic duplication from a hologram original plate,
- wherein said hologram original plate is formed by recording four wavelengths in a same layer of photosensitive material.
Dependencies are inferred from the claim text.