Introduction:

        Electronic Speckle Pattern Interferometer is a new method of experimental mechanics after Holographic Interferometer.Abandoned the complex traditional wet process of photograph printing photos, and directly to obtain the interference fringes by the optical imaging system and digital image collecting and processing system. This has already been widely used in Engineering. For solving the problem strength and rigidity , also can be used for residual stress measurement.

         In-plane displacement in one dimension phase-shifting electronic speckle pattern interferometer can real-time observe represent interference fringes of in-plane displacement, can also be obtained by phase shifting technique to obtain the measured displacement field distribution of the surface, and can meet the need of scientific research and teaching.With cantilever loading device, the whole system is more stable and reliable, easier adjustment, which has obtained a better teaching effect

☆  TS-SI-1XP In-plane displacement in one dimension phase-shifting electronic speckle pattern interferometer

Main Technical Specification

◆Light source: Semiconductor laser (Green light) output power is20mW, Wavelength is 532nm 

◆Camera：1280×1024 USB2.0 digital camera

◆Lens: 25mm fixed focus lens(standard configuration), other C interface lens is optional

◆  Working Distance：400～800mm

◆  Phase shifter：10nm

◆ Fringe resolution: 1/20 fringe

◆Maximum range：150mm×150mm

◆Phase shift control precision: 0.01V

Major Dispositions:

Computer:1

532nm diode-pumped solid-state laser (built-in):1

C interface camera（f25mm）AVENIR:1

TS-1000USB Camera (built in):1

600mm*900mm optical platform :1

cantilever loading device:1

Fringe real-time display software, phase shift software: one set for each

Principle Diagram

        When you shine a laser at the surface of a diffuse object，due to the mutual interference of scattering light, Intensity in the space at random fluctuation. it will form Many bright spots on the background space, namely the Speckle images. If the object has In-plane distortion,the laser beam to diffuse reflection surface, due to the mutual interference of the scattered light, the intensity in the space at random fluctuations in the background, in the space of dark spots on the formation of many particles, speckle image。to produce the in-plane deformation, which can be deformed speckle before and after surface coincide will produce and in-plane deformation corresponding correlation fringes, which can be measured to deformation.

application range

High-precision measurement used for High-precision measurement of 2D in-plane displacement:

       Digital speckle displacement detection technology has been widely used in industrial inspection, in order to improve the quality of industrial detection and enhance understanding of complex material properties. Can be used to detect a few centimeters or millimeters sample surface.Detection characteristics of composite biomaterials. etecting the temperature of heat deformation.Observation of physical phenomena in transparent liquids, such as water solution or gel crystal formation density, concentration gradient etc.

Education:

Experiment Teaching of material mechanics and experimental mechanics