Patent ID: 7806540

Claim:
A lighting device for examining quality of a product, comprising: a transparent disk with a cylindrical bore on a central axis and a cylindrical outer wall, the cylindrical bore having a light introducing surface on an inner periphery of the cylindrical bore; a plurality of spaced luminous bodies are mounted on a flexible luminous body mounting substrate of an elongated configuration, the luminous body mounting substrate is mounted adjacent the light introducing surface to enable the spaced luminous bodies to direct light radially outward within the transparent disk; and a reflective member is provided on the cylindrical outer wall, an upper surface of the transparent disk and a lower surface of the transparent disk except for an annular ring of a light emitting luminous surface on the transparent disk which is spaced radially outward from the cylindrical bore to enable light emissions parallel to the central axis, wherein the light emitting luminous surface has a light scattering property to emit a uniform luminous intensity of light to the product.