JPS55130562A - Image recorder - Google Patents

Abstract

PURPOSE: To make recording speed high as far as possible and reduce uneven densities as far as possible by forming a latent image on the photosensitive film of the specific photoconductive material by the image light by the specific fluorescent film of a cathode ray tube via the specified focusing type optical transmission body array.

CONSTITUTION: The light image formed by a cathode ray tube 1 which uses cubic crystal system ZnS:Ag for its fluorescent film material propagates in a focusing type optical transmission body array 2 and forms a latent image on a photoreceptor 3 using selenium as its photoconductive material. If this array 2 is formed by arraying the focusing type optical transmission bodies of the length Z satisfying the conditions of formula II at (r) densely in three rows at the refractive index distribution satisfying the conditions of formula I and the photoreceptor 3 is exposed by this with the central optical transmission body as the main array, then the exposure light becomes even and of the maximum brightness, as a result of which the recording speed becomes as large as possible and the image of the smallest possible uneven density may be formed. Here, the similar results are also obtained even if the array 2 is formed by the densiest configuration of the main array and the two or more arrays differing in refractive index distribution constant, central refractive index, etc. from the other arrays. Here, r₀: central refractive index; a: refractive index distribution constant; r: distance from the center.

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