An optical laminate structure (L1, L2, L3) comprising: a first layer made of a material that may cause outgassing, the first layer having a bonding face ; a second layer having a bonding face ; at least one step (S) on the bonding face of the first layer ; a retarder layer having a larger retardation value than the first layer , the retarder layer being positioned between the first layer and the second layer , and having a first bonding face facing the first layer and a second bonding face facing the second layer ; a first adhesive layer bonding together the bonding face of the first layer and the first bonding face of the retarder layer ; and a second adhesive layer bonding together the bonding face of the second layer and the second bonding face of the retarder layer , wherein the optical transparency of the optical laminate structure is such as to allow a user to recognize visual information displayed by an image display device (D) through the optical laminate structure, characterized in that the retarder layer is configured to convert linearly polarized light into circularly polarized light, the first adhesive layer has such hardness that suppresses the outgassing in an interface between the first layer and the first adhesive layer and includes at least one first warpable portion in contact with the at least one step (S), the at least one first warpable portion being warped to protrude toward the second adhesive layer , the retarder layer includes at least one second warpable portion in contact with the at least one first warpable portion , the at least one second warpable portion being warped to protrude toward the second adhesive layer ; and the second adhesive layer is distorted yielding and conforming to the at least one second warpable portion of the retarder layer , is more flexible than the first adhesive layer , and has such hardness as to get distorted by the at least one second warpable portion and thereby absorb height of the at least one second warpable portion . a first layer made of a material that may cause outgassing, the first layer having a bonding face ; a second layer having a bonding face ; at least one step (S) on the bonding face of the first layer ; a retarder layer having a larger retardation value than the first layer , the retarder layer being positioned between the first layer and the second layer , and having a first bonding face facing the first layer and a second bonding face facing the second layer ; a first adhesive layer bonding together the bonding face of the first layer and the first bonding face of the retarder layer ; and a second adhesive layer bonding together the bonding face of the second layer and the second bonding face of the retarder layer , wherein the optical transparency of the optical laminate structure is such as to allow a user to recognize visual information displayed by an image display device (D) through the optical laminate structure, characterized in that the retarder layer is configured to convert linearly polarized light into circularly polarized light, the first adhesive layer has such hardness that suppresses the outgassing in an interface between the first layer and the first adhesive layer and includes at least one first warpable portion in contact with the at least one step (S), the at least one first warpable portion being warped to protrude toward the second adhesive layer , the retarder layer includes at least one second warpable portion in contact with the at least one first warpable portion , the at least one second warpable portion being warped to protrude toward the second adhesive layer ; and the second adhesive layer is distorted yielding and conforming to the at least one second warpable portion of the retarder layer , is more flexible than the first adhesive layer , and has such hardness as to get distorted by the at least one second warpable portion and thereby absorb height of the at least one second warpable portion . <EOS>