Method for manufacturing lens, method for manufacturing molding die for lens, method for manufacturing mirror, method for manufacturing molding die for mirror, lens and molding die for lens

A method for machining and forming a lens molding die including a first surface that is a rotationally-asymmetric non-axisymmetric surface at least a part of which includes a free-form surface or an eccentric aspherical surface,

• the method comprising:
• the first surface being formed while scanning a surface of a workpiece in three-dimensional movement by using a grinding or cutting machine, including
• a first step of grinding or cutting the first surface by using the grinding or cutting machine while moving and scanning in a first direction along a meridional surface of the first surface, the first direction corresponding to an in-plane vertical direction of an image surface and a second direction corresponding to an in-plane horizontal direction, the first direction and the second direction forming the first surface;
• and
• a second step of repeating the first step while sequentially moving the grinding or cutting machine in the second direction,
• wherein the grinding or cutting machine is a machining tool configured to be attached to a stage in which the three-dimensional movement is controlled, to be arranged at a position corresponding to a position of the surface of the workpiece, and to be controlled in rotational driving around a rotational axis crossing the surface, while the workpiece is fixed, so that the formation is performed, or
• wherein the workpiece is configured to be attached to a stage in which the three-dimensional movement is controlled, while the grinding or cutting machine is a machining tool configured to be arranged at a position corresponding to a position of the surface of the workpiece, to be controlled in rotational driving around the rotational axis crossing the surface, and to be fixed, so that the formation is performed.

A method for machining and forming a mirror including a first surface that is a rotationally-asymmetric non-axisymmetric surface at least a part of which includes a free-form surface or an eccentric aspherical surface,

• the method comprising:
• the first surface being formed while scanning a surface of a workpiece in three-dimensional movement by using a grinding or cutting machine, including
• a first step of grinding or cutting the first surface by using the grinding or cutting machine while moving the scanning in a first direction along a meridional surface of the first surface, the first direction corresponding to an in-plane vertical direction of an image surface and a second direction corresponding to an in-plane horizontal direction, the first direction and the second direction forming the first surface;
• and
• a second step of repeating the first step while sequentially moving the grinding or cutting machine in the second direction,
• wherein the grinding or cutting machine is a machining tool configured to be attached to a stage in which the three-dimensional movement is controlled, to be arranged at a position corresponding to a position of the surface of the workpiece, and to be controlled in rotational driving around a rotational axis crossing the surface, while the workpiece is configured to be fixed, so that the formation is performed, or
• wherein the workpiece is configured to be attached to the stage in which the three-dimensional movement is controlled, while the grinding or cutting machine is a machining tool configured to be arranged at a position corresponding to a position of the surface of the workpiece, to be controlled in rotational driving around the rotational axis crossing the surface, and to be fixed, so that the formation is performed.

A method for machining and forming a mirror molding die including a first surface that is a rotationally-asymmetric and non-axisymmetric surface at least a part of which includes a free-form surface or an eccentric aspherical surface,

• the method comprising:
• the first surface being formed while scanning a surface of a workpiece in three-dimensional movement by using a grinding or cutting machine,
• a first step of grinding or cutting the first surface by using the grinding or cutting machine while moving and scanning in a first direction along a meridional surface of the first surface, the first direction corresponding to an in-plane vertical direction of an image surface and a second direction corresponding to an in-plane horizontal direction, the first direction and the second direction forming the first surface;
• and
• a second step of repeating the first step while sequentially moving the grinding or cutting machine in the second direction,
• wherein the grinding or cutting machine is a machining tool configured to be attached to a stage in which the three-dimensional movement is controlled, to be arranged at a position corresponding to a position of the surface of the workpiece, and to be controlled in rotational driving around a rotational axis crossing the surface, while the workpiece is configured to be fixed, so that the formation is performed, or
• wherein the workpiece is configured to be attached to the stage in which the three-dimensional movement is controlled, while the grinding or cutting machine is a machining tool configured to be arranged at a position corresponding to a position of the surface of the workpiece, to be controlled in rotational driving around the rotational axis crossing the surface, and to be fixed, so that the formation is performed.