Lens forming mold and manufacturing method for cylindrical lens

A manufacturing method for a plurality of cylindrical lenses using a lens forming mold for forming, from a glass material formed into a circular plate shape, a molding on which a plurality of cylindrical surfaces are arranged in parallel, the lens forming mold comprising:

• a first mold comprising:
• a plurality of cylindrical surface forming portions that are arranged in parallel at equal intervals;
• and a first flat surface forming portion that is provided between adjacent cylindrical surface forming portions;
• and
• a second mold comprising a second flat surface forming portion that sandwiches the glass material and faces the plurality of cylindrical surface forming portions and the first flat surface forming portion of the first mold when the molding is molded,
• wherein the first mold and the second mold are each formed into a cylindrical shape that has a circular molding surface,
• the method comprising the steps of:
• placing a glass material formed into a circular plate shape on the first mold and joining the first mold and the second mold to thereby form, without performing centering, a molding on which a plurality of cylindrical surfaces are arranged in parallel;
• and
• cutting the molding with a cutting tool in two directions, the two directions being a direction in which the plurality of cylindrical surfaces are arranged and a direction that intersects with the direction in which the plurality of cylindrical surfaces are arranged, to thereby obtain the plurality of cylindrical lenses from one molding.