| 摘要 |
An optical system is provided with an adaptable window element at a Fourier plane for spatial filtering. Having a window element made up of individually addressable pixels provides a substantial improvement in the spatial filtering adaptability and precision. When combined with a computer and sensor, the window may become part of a negative feedback loop, thereby providing the optical system with more consistent reproducibility, higher reliability with graceful degradation, and more precise control over final results.
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