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| Number | Title | Issue Date |
| 6201601 | Sample inspection system A curved mirrored surface is used to collect radiation scattered by a sample surface and originating from a normal illumination beam and an oblique illumination beam. The collected radiation is focused to a detector. Scattered radiation originating from t... | 03/13/2001 |
| 6192174 | Wavelength selection switches for optical application At least one filter may be employed between two input channels and two output channels to selectively switch wavelengths of radiation between the input and output channels. In one configuration, a switch member having two different filters thereon is move... | 02/20/2001 |
