Acousto-optic system and optical device

The dual-element acousto-optic system addresses parasitic wavelength issues by separating target and parasitic wavelengths, enhancing signal quality in microscopy.

WO2025214596A1 Publication Date: 2025-10-16LEICA MICROSYSTEMS CMS GMBH
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Patent Information

Application Number
PCT/EP2024/059734
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-04-10
Publication Date
2025-10-16

AI Technical Summary

Technical Problem

Existing acousto-optic systems fail to effectively manage parasitic wavelengths when using broadband light sources spanning an octave, leading to issues like crosstalk, cross-excitation, and signal-to-noise ratio deterioration due to simultaneous diffraction of target and parasitic wavelengths.

Method used

An acousto-optic system comprising two acousto-optic elements arranged in series, where the first element diffracts the target wavelength into a predetermined order while the second element is tuned to block the parasitic wavelength, ensuring they propagate along separate beam paths.

Benefits of technology

Effectively blocks parasitic wavelengths, preventing issues such as crosstalk and improving signal quality in microscopy applications by ensuring only the target wavelength reaches the sample.

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Abstract

An acousto-optic system (112) comprises a first acousto-optic element (114) and a second acousto-optic element (116) arranged in series along a beam path to transmit light including a target wavelength and a parasitic wavelength. The first acousto-optic element (114) is configured to be tuned to the target wavelength for diffracting the target wavelength into a predetermined diffraction order while simultaneously diffracting the parasitic wavelength into another diffraction order. The second acousto-optic element (116) is configured to be tuned to the target wavelength for diffracting the target wavelength received from the first acousto-optic element (114) into the predetermined diffraction order while simultaneously transmitting the parasitic wavelength received from the first acousto-optic element (114) without diffraction.
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