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An image detecting apparatus is used to detect an image of a pattern of lines on a palm. The image detecting apparatus has an optical transparent block which has a refractive index greater than that of a surrounding medium. The optical transparent block also has a convex curved surface on which the

An image detecting apparatus is used to detect an image of a pattern of lines on a palm. The image detecting apparatus has an optical transparent block which has a refractive index greater than that of a surrounding medium. The optical transparent block also has a convex curved surface on which the palm is placed. The image detecting apparatus further includes a light source for emitting light towards the convex curved surface through the optical transparent block, and an image sensor is provided for detecting at least the light reflected from the convex curved surface.

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An image detecting apparatus used to detect an image of a pattern of lines on a palm, comprising: an optical transparent block having an index of refraction which is greater than an index of refraction of a medium surrounding said optical transparent block, said optical transparent block having a co

An image detecting apparatus used to detect an image of a pattern of lines on a palm, comprising: an optical transparent block having an index of refraction which is greater than an index of refraction of a medium surrounding said optical transparent block, said optical transparent block having a convex curved surface curved in three dimensions and shaped to fit the palm, on which the palm is placed such that said convex curved surface contacts substantially an entire area of the palm; light emitting means for emitting light towards said convex curved surface, said light emitting means positioned such that said emitted light is incident on said convex curved surface from within said optical transparent block; and image sensing means for detecting at least light reflected by said convex curved surface.