| 摘要 |
In an optical system, like a lens system, having at least one transition from a first medium to a second medium, a newly designed coating, for example, an anti-reflection coating is applied. The coating is composed of a number of sub-coatings (25, 30, 35, 40, 45, 50), each of which is optimized for a different angle of incidence. With this coating, the intensity of a beam passing through a high numerical optical system can be kept constant.
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