A sensor frame has a first frame portion and a second frame portion, and a rod lens array extending in a longitudinal direction is arranged and fixed between the first and second frame portions. The image-area separating apparatus performs an image-area separation operation to separate character images from figure images by means of software while the SIMD-typed processor achieves a high-speed image data processing. Then, a second layered structure comprising at least a second substrate is provided. Other elements of the fluid-burning lamp include a fluid container for holding a combustible fluid to be used as fuel for the burn, and a wick assembly containing a wick having a lower portion that extends into the combustible fluid.