Abstract: A glass antenna device capable of receiving well both AM and FM broadcast signals wherein a series resonance is generated by a coil 31 disposed between a defogger 90 and a receiver 7, a parallel resonance is generated by a coil 32 disposed between the defogger 90 and the automobile body as the earth and a high frequency choking coil 52 for blocking FM signals is connected between an antenna conductor 3 and the defogger 90 to prevent the FM signals exited in the antenna conductor 3 from leaking to the automobile body as the earth.

Abstract: An optical pick-up for reading data in the data recording surface of an optical data recording material by collecting light from a light source by means of an objective lens, and shining reflection light from the data recording surface onto a light receiving element through the objective lens, the optical pick-up being adapted to read data in the data recording surface of first and second optical data recording materials wherein the thickness of a protective substrate is different from each other, wherein the objective lens is so determined that the aberration is corrected in response to the thickness of the protective substrate of the first optical data recording material, and in reading data in the data recording surface of the second optical data recording material which has a thickness different from that of the first optical data recording material, the object.image distance is adjustable so as to adjust the aberration.