Patent ID: 6624930
Filing Date: 2003-09-23
Classification: G02B

Abstract:
An illumination device for a DUV (â€œDeep Ultra Violetâ€ ) microscope, comprising:a DUV light source defining an illumination beam path; a condenser and a reflection filter system arranged in said illumination beam path wherein said reflection filter system comprises four reflection filters at which an illumination beam is reflected in each case at the same reflection angle &agr; and generates a DUV wavelength band &lgr;DUV+&Dgr;&lgr;, wherein the illumination beam path extends coaxially in front of and behind the reflection filter system, wherein each reflection angle &agr; is less than 30Â° and the DUV wavelength band &lgr;DUV+&Dgr;&lgr; has a half-value width of max. 20 nm and a peak intensity of outgoing light is at least 90% of the incoming light intensity.