Radiation image read-out apparatus
View Patent ↗A radiation image read-out apparatus for reading out a radiation image recorded on a stimulable phosphor sheet includes a stimulating light projector which projects stimulating light emitted from a stimulating light source onto the stimulable phosphor sheet through a projecting optical system so that the stimulating light is collected in a line-like area of the stimulable phosphor sheet, and a line sensor which detects stimulated emission emitted from the line-like area of the stimulable phosphor sheet upon exposure to the stimulating light. The projecting optical system has an aspheric toric surface.
1. A radiation image read-out apparatus for reading out a radiation image recorded on a stimulable phosphor sheet comprising a stimulating light projecting means which projects stimulating light emitted from a stimulating light source onto the stimulable phosphor sheet through a projecting optical system so that the stimulating light is collected in a line-like area of the stimulable phosphor sheet and a line sensor which detects stimulated emission emitted from the line-like area of the stimulable phosphor sheet upon exposure to the stimulating light, wherein the improvement comprises that
the projecting optical system has an aspheric toric surface.
2. A radiation image read-out apparatus as defined in claim 1 in which the stimulating light projecting means comprises a plurality of pairs of the stimulating light source and the projecting optical system arranged along the longitudinal direction of said line-like area.
3. A radiation image read-out apparatus as defined in claim 2 in which the pairs of the stimulating light source and the projecting optical system are arranged so that line-like areas in which the stimulating light emitted from the respective stimulating light sources is collected through the corresponding projecting optical systems at least partly overlap each other.
4. A radiation read-out apparatus as defined in claim 2 , wherein the stimulating light is formed as a continuous line in the line-like area.
5. A radiation read-out apparatus as defined in claim 4 , wherein the pairs of the stimulating light source and projecting optical system are arranged so that the line-like areas in which the stimulating light emitted from the respective stimulating light sources is collected through the corresponding optical systems at least partially overlap each other at regions along said continuous line.
6. A radiation read-out apparatus as defined in claim 1 , wherein the stimulating light is projected onto the stimulable phosphor sheet at an oblique angle.
7. A radiation read-out apparatus as defined in claim 1 , wherein the projecting optical system comprises an aspheric toric lens.
8. A radiation read-out apparatus as defined in claim 7 , wherein the aspheric toric lens comprises a resin material.