Method for producing an optical element

Method for producing an optical element with an optical surface having a diffraction structure,

• the optical surface being curved such that a distance-to-diameter ratio A/D between
• a distance A, measured along an averaged surface normal (N) of the optical surface, between a deepest point (T) and a highest point (H) on the optical surface and
• a largest diameter D of the optical surface is greater than 1/10,
• comprising the following steps to produce the optical element with the optical surface:
• providing a raw optical element having a raw optical surface to be provided with the diffraction structure,
• coating the raw optical surface with a photoresist with an isotropic deposition method,
• structured exposing the photoresist, and
• developing the photoresist;
• wherein the coating of the raw optical surface with the photoresist with the aid of the isotropic deposition method and the development of the photoresist is carried out repeatedly one after another during the production method.