摘要:
An optical reproduction system, which can be configured for example as a catadioptric projection lens. This system includes an optical axis and a first deflection mirror, which is tilted in relation to the optical axis at a given tilt angle. One of the deflection mirrors has a ratio Rsp of the reflection coefficient Rs for s-polarised light to the reflection coefficient Rp for p-polarised light, in an incidence angle range that includes the tilt angle, of greater than one, whereas the corresponding ratio for the other deflection mirror is less than one. The deflection mirrors thus ensure that the polarization-dependant influence of the travel light remains minimal.
摘要翻译:可以配置为例如反射折射投影透镜的光学再现系统。 该系统包括光轴和第一偏转镜,其以给定的倾斜角相对于光轴倾斜。 偏转镜中的一个具有对于s偏振光的反射系数R S s的反射系数R p S的比值R s SP与对于p的反射系数R p p 在包括倾斜角的入射角范围内的棱镜光大于1,而另一偏转镜的对应比率小于1。 因此,偏转镜确保行进光的偏振相关影响保持最小。
摘要:
An optical component and a coating system for coating substrates for optical components with essentially rotationally symmetric coatings, the system having a planetary-drive system (1) that has a rotating planet carrier (2) and several planets (4), each of which carries a single substrate, that corotate both with the planet carrier and with respect to the primary carrier. In one embodiment a set of stationary first masks (20) that allow controlling the radial variation in physical film thickness is arranged between a source (8) of material situated beneath the planets and the substrates. A set of second masks that mask off evaporation angles exceeding a limiting evaporation or incidence angle (β max) for every substrate also corotate with the primary carrier (2), which allows depositing coatings having a prescribed radial film-thickness distribution and a virtually constant density of the coating material over their full radial extents for relatively low, and only slightly varying, evaporation angles.
摘要:
An objective for a microlithography projection system has at least one fluoride crystal lens. The effects of birefringence, which are detrimental to the image quality, are reduced if the lens axis of the crystal lens is oriented substantially perpendicular to the {100}-planes or {100}-equivalent crystallographic planes of the fluoride crystal. If two or more fluoride crystal lenses are used, they should have lens axes oriented in the (100)-, (111)-, or (110)-direction of the crystallographic structure, and they should be oriented at rotated positions relative to each other. The birefringence-related effects are further reduced by using groups of mutually rotated (100)-lenses in combination with groups of mutually rotated (111)- or (110)-lenses. A further improvement is also achieved by applying a compensation coating to at least one optical element of the objective.
摘要:
A method for coating substrates (10) for optical components with essentially rotationally symmetric coatings employs a coating system equipped with a planetary-drive system (1) that has a rotating planet carrier (2) and several planets (4), each of which carries a single substrate, that corotate both with the planet carrier and with respect to the primary carrier. In one embodiment a set of stationary first masks (20) that allow controlling the radial variation in physical film thickness is arranged between a source (8) of material situated beneath the planets and the substrates. A set of second masks that mask off evaporation angles exceeding a limiting evaporation or incidence angle (β max) for every substrate also corotate with the primary carrier (2), which allows depositing coatings having a prescribed radial film-thickness distribution and a virtually constant density of the coating material over their full radial extents for relatively low, and only slightly varying, evaporation angles.