Optical information recording medium having super-resolution film

An optical information recording medium reproducing device for reproducing an optical information recording medium,

• the optical information recording medium including:
• a light transmittable layer having an incident surface on which reproduction light is incident;
• two or more information recording layers;
• a substrate, the light transmittable layer, the information recording layers, and the substrate being stacked in this order from an incident side on which the reproduction light is incident;
• and
• an intermediate layer that separates the information recording layers from each other,
• the two or more information recording layers having information recorded thereon as marks and spaces by a predetermined modulation method,
• the two or more information recording layers each including (i) a group of pre-pits constituting the marks and the spaces and (ii) a super-resolution film,
• the marks and the spaces constituted by the group of pre-pits having different lengths,
• an average length of a smallest mark that is smallest in length among the marks constituted by the group of pre-pits and a smallest space that is smallest in length among the space constituted by the group of pre-pits being less than or equal to a resolution limit of a reproduction optical system for reproducing the information recorded on the information recording layers,
• the resolution film being a film that enables the reproduction optical system to reproduce information recorded by the group of pre-pits,
• the group of pre-pits being in an in-pit format by which the marks are formed more depressed than the spaces with respect to the incident surface on which the reproduction light is incident,
• the optical information recording medium reproducing device comprising:
• a tracking control section which causes the reproduction optical system to carry out tracking with respect to the group of pre-pits.

An optical information recording medium reproducing device for reproducing an optical information recording medium,

• the optical information recording medium including:
• a light transmittable layer having an incident surface on which reproduction light is incident;
• two or more information recording layers;
• a substrate, the light transmittable layer, the information recording layers, and the substrate being stacked in this order from an incident side on which the reproduction light is incident;
• and
• an intermediate layer that separates the information recording layers from each other,
• the two or more information recording layers having information recorded thereon as marks and spaces by a predetermined modulation method,
• the two or more information recording layers each including (i) a group of pre-pits constituting the marks and the spaces and (ii) a super-resolution film,
• the marks and the spaces constituted by the group of pre-pits having different lengths,
• an average length of a smallest mark that is smallest in length among the marks constituted by the group of pre-pits and a smallest space that is smallest in length among the space constituted by the group of pre-pits being less than or equal to a resolution limit of a reproduction optical system for reproducing the information recorded on the information recording layers,
• the resolution film being a film that enables the reproduction optical system to reproduce information recorded by the group of pre-pits,
• the group of pre-pits being in an in-pit format by which the marks are formed more depressed than the spaces with respect to the incident surface on which the reproduction light is incident,
• the optical information recording medium reproducing device comprising:
• a clock generating section which generates a clock for reproducing the information recorded by the group of pre-pits.