LOW ENERGY RECORDING PROCESS

摘要

Process for recording optical information, which comprises irradiating an optical information medium comprised of an information layer containing an aza-annulene compound, e.g., a naphthalocyanine compound, with a focused light source at a relatively low power level. The power level is sufficient to effect a reflectivity change in those areas irradiated, without effecting a visually detectable change in the information layer. Such a process using an aza-annulene compound can provide an actual positive contrast in the reflectivity reading of the information layer at relatively low power levels. Accordingly a more sensitive requiring less power to effect the recording of optical information is obtained.