Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Patent
1991-10-07
1994-03-22
Schilling, Richard L.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
430584, 430349, 430944, 430567, 430503, G03C 1005
Patent
active
052963438
ABSTRACT:
Disclosed is a silver halide photographic emulsion spectrally sensitized in the wavelength range longer than 730 nm, and full-color recording materials containing such a photographic emulsion. The photographic emulsion has undergone J-band sensitization by containing at least one compound represented by the following general formula (I) in an amount of from 0.3 to 0.9 based on the specific addition amount defined in the disclosure, at a temperature ranging from 60.degree. C. to 85.degree. C. to gain a spectral sensitivity maximum at a wavelength from 730 nm to 900 nm: ##STR1## wherein Z.sub.1 and Z.sub.2 each represents a sulfur or selenium atom; Q.sub.1 and Q.sub.2 each represents a methylene group; R.sub.1 and R.sub.2 each represents an alkyl group; R.sub.3 represents an alkyl group, an aryl group or a heterocyclyl group; L.sub.1, L.sub.2 and L.sub.3 each represents a methine group; A.sub.1 and A.sub.2 each represents the atoms necessary for completing a benzene ring; R.sub.1 and R.sub.2 may combine with L.sub.1 and L.sub.3, respectively, to form a ring; M.sub.1 represents a counter ion for charge balance; and m.sub.1 represents the numerical value required for neutralization of the electric charge.
REFERENCES:
patent: 2481022 (1949-09-01), Kendall et al.
patent: 4619892 (1986-10-01), Simpson et al.
patent: 4814264 (1989-03-01), Kishida et al.
patent: 4939080 (1990-07-01), Hioki et al.
patent: 5141845 (1992-08-01), Brugger et al.
patent: 5175080 (1992-12-01), Hioki et al.
Tani, T., "Determination of Crystal Habit of Fine Silver Halide Grains in Photographic Emulsions through Their Adsorption of Dyes", The Chemical Society of Japan, (6), pp. 942-947 (1984).
Kampfer, H., "IR-Absorbing-J-Aggregates of Dicarbocyanine Dyes", Progress in Basic Principles of Imaging Systems, (Cologne 1986).
Hioki Takanori
Ikeda Tadashi
Kato Takashi
Fuji Photo Film Co. , Ltd.
Neville Thomas R.
Schilling Richard L.
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