Interchangeable mountings, e.g. for replacement of head without readjustment

Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor > Disposition or mounting of heads or light sources relatively to record carriers > Interchangeable mountings, e.g. for replacement of head without readjustment

Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation , reproducing using an optical beam at lower power ; Record carriers therefor (G11B11/00, G11B13/00 take precedence) > Disposition or mounting of heads or light sources relatively to record carriers > Interchangeable mountings, e.g. for replacement of head without readjustment