Abstract: The invention relates to a device for adjusting the temperature of elements, especially adjusting the temperature of a projection lens (1) or of parts of a projection lens (1) for use in semiconductor lithography. Said device comprises a temperature-adjusting jacket (18) which is provided with at least one temperature-adjusting line (19). Said at least one temperature-adjusting line (19) is formed into the temperature-adjusting jacket (18).

Abstract: A mount for an optical element has a fitting area for fitting the optical element. Located in the fitting area is an additional material whose state can be changed by means of a state changing device in such a way that following change of state of the additional material the optical element is held in the mount in a form-fitting and releasable fashion by the additional material. Furthermore, provided is a method for manipulating an optical device which comprises providing an optical element attached to an optical device by an adhesive, said adhesive comprising particles susceptible to a magnetic field. In a second step a magnetic field is applied to the adhesive. Also provided is an optical device to be used in conjunction with this method.