摘要:
A method of calibrating an interferometer for determining an optical property of the interferometer uses a calibrating optical arrangement. The calibrating optical arrangement comprises at least one diffractive pattern and a mirror having a reflecting surface. The diffractive pattern and the reflecting surface are disposed at a distance from each other in a beam path of measuring light emitted from an interferometer optics of the interferometer system to be calibrated.
摘要:
A method of processing an optical element comprises testing the optical surface of the optical element using an interferometer optics for generating a beam of measuring light; wherein the interferometer optics has a plurality of optical elements which are configured and arranged such that the measuring light is substantially orthogonally incident on a reflecting surface, at each location thereof; and wherein the method further comprises: measuring at least one property of the interferometer optics, disposing the optical surface of the optical element at a measuring position relative to the interferometer optics within the beam of measuring light, and performing at least one interferometric measurement; determining deviations of the optical surface of the first optical element from a target shape thereof, based on the interferometric measurement and the at least one measured property of the interferometer optics.
摘要:
Optical element having an optical surface, which optical surface is adapted to a non-spherical target shape, such that a long wave variation of the actual shape of the optical surface with respect to the target shape is limited to a maximum value of 0.2 nm, wherein the long wave variation includes only oscillations having a spatial wavelength equal to or larger than a minimum spatial wavelength of 10 mm.
摘要:
Optical element having an optical surface, which optical surface is adapted to a non-spherical target shape, such that a long wave variation of the actual shape of the optical surface with respect to the target shape is limited to a maximum value of 0.2 nm, wherein the long wave variation includes only oscillations having a spatial wavelength equal to or larger than a minimum spatial wavelength of 10 mm.
摘要:
A method of manufacturing an optical system comprises assembling an optical element on a mounting frame thereof. The mounting frame is disposed on a rotary table having an axis of rotation, and the mounting frame is adjusted such that a predefined axis of symmetry thereof is parallel to the axis of rotation. The optical element is placed on the mounting frame, and an interferometric measurement of a surface of the optical element is performed. The interferometric measurement is analyzed to arrange the optical element relative to the mounting frame such that a predefined axis of the optical element is parallel to the axis of rotation.
摘要:
A method of manufacturing an optical element includes testing the optical element by using an interferometer optics generating a beam of measuring light illuminating only a sub-aperture of the tested optical element. The interferometer optics comprises a hologram. Results of the sub-aperture measurement are stitched together to obtain a measuring result with respect to the full surface of the optical element. Further, a method of calibrating the interferometer optics includes performing an interferometric measurement using a calibrating optics having a hologram covering only a sub-aperture of the full cross section of the beam of measuring light generated by the interferometer optics and stitching together the sub-aperture measurements to obtain a result indicative for the full cross section of the interferometer optics.
摘要:
A method of manufacturing an optical element having an optical surface of a target shape includes performing an interferometric test using an interferometer optics, wherein the interferometer optics includes a hologram that deflects a beam of measuring light by a substantial angle or that displaces an axis of symmetry of measuring light emerging from the hologram with respect to an axis of symmetry of measuring light incident on the hologram.
摘要:
A method of manufacturing an optical element includes testing the optical element by using an interferometer optics generating a beam of measuring light illuminating only a sub-aperture of the tested optical element. The interferometer optics comprises a hologram. Results of the sub-aperture measurement are stitched together to obtain a measuring result with respect to the full surface of the optical element. Further, a method of calibrating the interferometer optics includes performing an interferometric measurement using a calibrating optics having a hologram covering only a sub-aperture of the full cross section of the beam of measuring light generated by the interferometer optics and stitching together the sub-aperture measurements to obtain a result indicative for the full cross section of the interferometer optics.
摘要:
An optical element having an optical surface (12; 103), which optical surface has an actual shape, the actual shape deviating from a desired shape by maximum 0.2 nm, wherein the desired shape is either: a free-form surface having a deviation from its best-fitting sphere of at least 5 μm or a substantially rotationally symmetrical surface having a deviation from its best-fitting sphere of at least 0.5 mm.
摘要:
An optical element having an optical surface (12; 103), which optical surface has an actual shape, the actual shape deviating from a desired shape by maximum 0.2 nm, wherein the desired shape is either: a free-form surface having a deviation from its best-fitting sphere of at least 5 μm or a substantially rotationally symmetrical surface having a deviation from its best-fitting sphere of at least 0.5 mm.