6 results about "Acoustic microscopy" patented technology

A measuring device detects buried structures in a sample, such as voids or other underlying structures, based on an instantaneous signal difference determined from a single signal acquisition. The single signal acquisition is produced using a series of primary pump pulses and series of secondary pump pulses, which are intensity modulated and opposite in phase. The primary pump pulses and secondary pump pulses are combined to form a pump beam that is incident on the sample causing transient perturbations in material in the sample. Probe pulses are likewise incident on the sample and each probe pulse is modulated by the combined transient perturbations caused by a preceding primary pump pulse and a preceding secondary pump pulse. A series of reflected probe pulses are detected and demodulated to determine an instantaneous signal difference produced in response to the combined primary and secondary pump pulses, from which the buried structure is detected.

An opto-acoustic measurement device detects and images buried structures in a sample, such as voids or other underlying structures, using a fixed delay time between pulses in the pump beam and pulses in the probe beam, while continuously scanning the sample over multiple measurements locations. The signals acquired at a fixed pump-probe time delay from a plurality of measurements locations has sufficient information and sensitivity to discriminate the presence or absence of a buried structure, such as a void, inclusion or solid structure, in a sample. The pump and probe beams may be focused in a line shaped illumination spot that is oriented orthogonally to that direction of travel during the scan, and a multi-channel linear detector array may detect signals at a plurality of locations along the line shaped illumination spot. Non-acoustic transient perturbations may be detected using two fixed pump-probe delay times.

The invention relates to a method and system for operating an ultrasound acoustic microscopy system equipped with a probe tip. The method involves determining the condition of the probe tip during and / or between ultrasound acoustic microscopy measurements and, if necessary, selectively conditioning the tip using an integrated tip conditioning unit. The conditioning process helps maintain or enhance the target performance characteristics of the probe tip, ensuring optimal imaging quality. The system comprises a probe tip for contacting a sample, an ultrasound generator for emitting acoustic signals, a detector for detecting echoes, and an evaluation module for assessing the tip's condition. The control system activates the tip conditioning unit selectively to ensure consistent imaging performance.

An opto-acoustic measurement device detects and images buried structures in a sample, such as voids or other underlying structures, using a fixed delay time between pulses in the pump beam and pulses in the probe beam, while continuously scanning the sample over multiple measurements locations. The signals acquired at a fixed pump-probe time delay from a plurality of measurements locations has sufficient information and sensitivity to discriminate the presence or absence of a buried structure, such as a void, inclusion or solid structure, in a sample. The pump and probe beams may be focused in a line shaped illumination spot that is oriented orthogonally to that direction of travel during the scan, and a multi-channel linear detector array may detect signals at a plurality of locations along the line shaped illumination spot. Non-acoustic transient perturbations may be detected using two fixed pump-probe delay times.

A measuring device detects buried structures in a sample, such as voids or other underlying structures, based on an instantaneous signal difference determined from a single signal acquisition. The single signal acquisition is produced using a series of primary pump pulses and series of secondary pump pulses, which are intensity modulated and opposite in phase. The primary pump pulses and secondary pump pulses are combined to form a pump beam that is incident on the sample causing transient perturbations in material in the sample. Probe pulses are likewise incident on the sample and each probe pulse is modulated by the combined transient perturbations caused by a preceding primary pump pulse and a preceding secondary pump pulse. A series of reflected probe pulses are detected and demodulated to determine an instantaneous signal difference produced in response to the combined primary and secondary pump pulses, from which the buried structure is detected.

This invention relates to the field of optical microscopy imaging technology, specifically to a large depth-of-focus ultraviolet photoacoustic microscopy imaging system and method, comprising: an ultraviolet photoacoustic signal acquisition module to acquire spatiotemporal distribution data of ultraviolet excitation light and its corresponding photoacoustic response signal data; a spectral-polarization feature extraction module to extract quantitative multidimensional feature parameters related to tissue composition and structure; a cross-depth standard sample module to perform systematic imaging measurements on standard biological tissue samples at different depths to form a feature parameter dataset; and an image reconstruction module that, by linking the spatial distribution characteristics of the ultraviolet excitation light field with the physical propagation laws of photoacoustic signals at different depths, designs a hierarchical signal response adaptation link to match the signal transmission loss differences across tissue depths, and performs signal attenuation correction through a hierarchical dynamic neural radiation field algorithm to reconstruct a tissue microscopic image with large depth-of-focus characteristics. This solves the problems of generally short depths of focus and lack of standardized data support for cross-depth imaging in existing technologies.