Abstract: To provide a substrate of a cell culture container in which cells are appropriately maintained in dents and the cells in the dents are appropriately observed, and a cell culture container. The substrate of a cell culture container of the present invention has a bottom face and a surface having a dent-formed region having a plurality of dents formed, wherein the average depth of the plurality of dents is 200 µm or more, the formula ?1<90-?2+sin-1{sin(?2)×1.38/n} is satisfied wherein ?1 (deg) is the angle formed by a first tangent line which passes a connecting point of a first curved line corresponding to a first dent and a second curved line corresponding to a second dent and which is in contact with the first curved line, and a base line which passes the connecting point and which is in parallel with the bottom face, and n is the refractive index of the substrate, and the formula ?2<90-?1+sin-1{sin(?1)×1.

Abstract: A cover glass for a pen input device has a haze value of less than 1%, and a Martens hardness within a range from 2000 N/mm2 to 4000 N/mm2. When a moving member receiving a load of 150 gf (1.47 N) is moved in one direction, at 10 mm/sec, at room temperature, on the surface of the cover glass, a coefficient of kinetic friction ?k of a kinetic frictional force Fk (N) exerted by the cover glass surface within a region where an approximately linear relationship is established between the kinetic frictional force Fk (N) and the time is 0.14˜0.50, and a standard deviation ? (N) of the kinetic frictional force Fk (N) is no more than 0.03. The moving member is a pen that includes a pen tip made of polyacetal resin with a Rockwell hardness of M90 and having a radius of curvature of 700 ?m.

Abstract: An apparatus for counting the number of passing persons by stature, wherein a projector for radiating light toward the head of a passing person, a light receiving lens for receiving light reflected from the person's head, and a light position detector are arranged as one set at an upper portion of a gateway or a passageway. The light receiving lens converges reflected light to different light-received positions of the light position detector according to the height of the reflective position. The light position detector outputs electric signals which differ according to the reflected light received at the light-received positions and a counting operation is performed discriminatively for every output of the signals.