Abstract: A sliding bearing formed from a member containing resin, wherein the effect of thermal expansion of the resin is reduced. A bearing surface (10) that slidably holds the outer peripheral surface of a rotating body is formed on the inner peripheral surface (11) of the sliding bearing (1), which is cylindrical, and the sliding bearing (1) is a cylindrical multi-layer sliding member which is manufactured by roll-molding a base material that has been impregnated with a base resin. A plurality of through-holes (13) that pass between the inner peripheral surface (11) and the outer peripheral surface (12) are formed at suitable intervals in the bearing surface (10) and within a range that enables the sliding bearing (1) to maintain a required load-bearing strength.

Abstract: A novel contact area measuring apparatus is provided. The contact area measuring apparatus includes a light transmissive substrate 6 in contact with a specimen 7, illumination means for illuminating the light transmissive substrate 6 with white light from the opposite side of the light transmissive substrate 6 to the specimen 7, interference image acquisition means 11 for acquiring an interference image produced by the light reflected off the specimen 7 and the light reflected off the light transmissive substrate 6, intensity histogram creation means for creating an intensity histogram from information on the intensity of the interference image, and contact area computation means for calculating a contact area from the intensity histogram. The interference image acquisition means 11 acquires an interference image and information on the intensity of the interference image.

Abstract: A novel contact area measuring apparatus is provided. The contact area measuring apparatus includes a light transmissive substrate 6 in contact with a specimen 7, illumination means for illuminating the light transmissive substrate 6 with white light from the opposite side of the light transmissive substrate 6 to the specimen 7, interference image acquisition means 11 for acquiring an interference image produced by the light reflected off the specimen 7 and the light reflected off the light transmissive substrate 6, intensity histogram creation means for creating an intensity histogram from information on the intensity of the interference image, and contact area computation means for calculating a contact area from the intensity histogram. The interference image acquisition means 11 acquires an interference image and information on the intensity of the interference image.