Integrating cylindrical pixel density detector

摘要

PCT No. PCT/JP97/01388 Sec. 371 Date Nov. 24, 1997 Sec. 102(e) Date Nov. 24, 1997 PCT Filed Apr. 22, 1997 PCT Pub. No. WO97/40353 PCT Pub. Date Oct. 30, 1997A pixel density detector includes a cylinder (1) having a characteristic of catching incident light, an entrance window (2) provided in a shape of a slit in the longitudinal direction of the cylinder (1), and 2 pieces of light detecting device (4) disposed at a prescribed internal on the cylinder (1) at a prescribed angle against the entrance window (2).