Optical Scanning Microscope Detection Layout for Spectral Separation

The patent applies segmentation by replacing a single point detector with a multi-element photodetector array, where each element independently detects light from different spatial positions. This segmentation enables simultaneous detection of multiple spatial frequencies, thereby improving spatial resolution beyond the diffraction limit while maintaining manageable device complexity through modular detector architecture.

The patent introduces spectral dispersion along a spatial dimension by integrating a dispersive element that separates different wavelengths of light into distinct spatial positions on the photodetector array. This dimensional transformation enables simultaneous spectral analysis across broad wavelength ranges without light loss, as all spectral components are detected in parallel rather than sequentially through filters.

The patent extracts only the useful first diffraction order from the diffraction grating output by using a spatial filter or aperture that blocks higher diffraction orders. This selective extraction eliminates the harmful effect of higher order light loss while preserving the beneficial spectral separation function, thereby improving detection efficiency.

The patent merges multiple polarization detection capabilities into a single photodetector array system by incorporating polarization-sensitive elements or using the array to detect both polarization states simultaneously. This merging approach improves signal-to-noise ratio and spectral information completeness while avoiding the complexity of separate detection systems for each polarization state.