Optical card of closed type

An enclosed-type optical card wherein optical recording section for recording information is isolated from an environment outside the optical card, said optical card comprising a first substrate capable of transmitting light having a first side and a second side, said first and second sides extending in parallel relation to each other, the first side of the first substrate being a writing side upon which a writing light is incident, an optical recording section located on said second side of said substrate, said optical recording section being capable of recording information such that pits are formed by optical energy of said writing light, said optical recording section including a thin membrane layer made of a recording material having light reflectivity, a sensitizing layer having first and second sides, the sensitizing layer being directly laminated on said optical recording section, said sensitizing layer being comprised of a self-oxidizable or thermoplastic resin, said sensitizing layer providing means for the escape of molten recording material when pits are formed in said optical recording section and means for enclosing said optical recording section, said means including a coating layer coated upon said sensitizing layer wherein said coating layer is an adhesive layer having first and second sides, and wherein said adhesive layer is attached to said second side of the first substrate such that said optical recording section is sandwiched between said adhesive layer and said second side of said first substrate and wherein a second card substrate is attached to the adhesive layer on the second side of adhesive layer, and wherein the optical recording section is smaller in dimension then the first substrate capable of transmitting light, wherein the optical recording section is enclosed within the adhesive layer and the sensitizing layer on lateral sides of the optical card.