Real-Time Multi-Point Diffraction-Based Imaging System For Strain Measurement

摘要

This invention relates to a system and a method for measuring testing strain resistance of a specimen on a strain measurement system having an image capturing device, a spatial light modulator, a first light source, a second light source and a beam switching controller. The system receives parameters from an input from a user and generates a lenslet pattern to be transmitted to the spatial light modulator. The system then transmits a frequency and switching sequence to the beam switching controller to alternate the first and second light sources and activate the image capturing device to capture image. Subsequently, the system receives a U image captured by the image capturing device caused by a beam of the first light source and a V image captured by the image capturing device caused by a beam of the second light source. Based on the U and V images received, the system optimises the image capturing device and subsequently displays the V and U images to a display. Concurrently, the system transmits a signal to the beam switching controller to temporary stop activating the first and second light sources and the image capturing device and waits for a subsequent input to begin stress measurement. In response to receiving the subsequent input, the system transmits a signal to the beam switching controller to continue alternating the first and second light sources and activating the image capturing device to capture image. The system receives a subsequent U and V images and displays the V and U images to a display in response to the image capturing device.

主权项

1. A method for measuring strain of a specimen on a strain measurement system having an image capturing device, a spatial light modulator, a first light source, a second light source, a beam switching controller, and a processing system, the method comprising:
receiving parameters from a user; generating a lenslet pattern based on the parameters received; transmitting said lenslet pattern to said spatial light modulator; transmitting a frequency and switching sequence to said beam switching controller to alternate said first and second light sources and activate said image capturing device to capture images; receiving a U image captured by said image capturing device caused by a beam of said first light source and a V image captured by said image capturing device caused by a beam of said second light source; optimising said image capturing device based on said V and U images received; displaying said V image and U image on a display in response to said image capturing device being optimised; transmitting a signal to said beam switching controller to temporarily stop alternating said first and second light sources and activating said image capturing device; receiving an input from said user to begin stress measurement; transmitting a signal to said beam switching controller to continue alternating said first and second light sources and activating said image capturing device to capture images; receiving a subsequent U image captured by said image capturing device caused by a beam of said first light source and a subsequent V image captured by said image capturing device caused by a beam of said second light source; and displaying said V image and U image on the display.