Electronic Speckle Interferometry Physics Lab Experiment Instrument

This experimental system is designed for the study of Electronic Speckle Pattern Interferometry (ESPI), a non-contact optical measurement technique used for analyzing surface deformation and structural behavior. The system utilizes laser-generated speckle patterns and digital image processing to investigate out-of-plane displacement and deformation characteristics of test objects.

By combining laser optics, interferometric measurement techniques, CCD image acquisition, and computer-based analysis, the system enables users to observe and quantify deformation phenomena with high sensitivity. It provides practical experience in modern optical metrology and experimental mechanics.

Experimental Principles

• Electronic speckle pattern interferometry (ESPI)
• Surface deformation measurement
• Displacement analysis
• Strain measurement studies
• Surface defect detection
• Crack detection and evaluation
• Laser interferometry techniques
• Digital image processing and analysis

• Optical metrology studies
• Structural deformation analysis
• Material testing and evaluation
• Non-destructive testing demonstrations
• Experimental mechanics education
• Laser measurement technology training
• Digital image processing applications

Laser Source :

• Visible gas laser

Beam Expander :

• Focal length 4.5

Beam Splitter :

• 60 mm × 50 mm

Test Samples :

• Thermal deformation specimen
• Stress deformation specimen

Heating Power Supply :

• 0–110 V adjustable

Image Acquisition System :

• CCD camera

Supporting Accessories :

• Adjustable mounting frames
• Optical mirrors
• Alignment components
• Optical holders and fixtures