Injection molding apparatus, injection molding method and production method of molded product using injection molding apparatus, and laminated lens

An injection molding apparatus comprising:

• a substantially circular first substrate;
• a substantially circular second substrate disposed to face a surface of the first substrate;
• a fixing member which fixes a peripheral end portion of the first substrate and a peripheral end portion of the second substrate;
• a gap formed by entire opposing surfaces of the first substrate and the second substrate;
• an injection portion which is provided in the fixing member;
• and
• a space connecting with the injection portion and the gap is provided in at least a part of a periphery of the gap;
• wherein a width of the space in a thickness direction is larger than a width of the gap in the thickness direction,
• the width of the gap in the thickness direction is substantially the same through the entire gap, and
• the injection portion injects a composition into the space.