Application Notes
Ripple marks formed in die-casting / 3D shape measurement using a digital microscope
Application
In the die casting process, molten metal flowing into the die may harden before it is fused completely, producing shallow wrinkles on the die-cast surface. This phenomenon is known as ripple marks. The ripple marks are problematic because they distort the external appearance of the product and may cause damage or deformation when stress is applied.
Olympus' solution
Olympus' DSX digital microscope easily creates accurate three-dimensional micro surface profiles, making it the ideal choice for defect management. Instead of dragging a contact stylus across the material’s surface, the DSX uses an optical method to create a 3D rendering of surface features. This ensures that delicate surfaces are not scratched or damaged. The DSX also features differential interference contrast (DIC) so users can easily observe even fine irregularities.
Non-defective surface
Defective surface
Objective lens 20X zoom 1X 4×2 stitching
Objective lens 20X zoom 1X 4×2 stitching
Products Used for This Application
LEXT OLS5500
Hybrid 3D Optical Profilometer
- Traceable surface measurements from the nanometer to micrometer scale
- Laser scanning microscopy (LSM), white light interferometry (WLI), and focus variation microscopy (FVM) in one award-winning platform
- First 3D optical profilometer to offer guaranteed accuracy and repeatability* for both LSM and WLI measurements
- WLI mode delivers up to 40x faster measurement throughput than conventional LSM
- Exceptional precision across surfaces with in-house engineered optics
- Intuitive interface and smart automation streamline operation for users of all levels
- AI-enhanced and high-throughput workflows with PRECiV™ software integration
*Based on Evident’s internal research as of October 2025. The guaranteed accuracy and repeatability apply only if the device has been calibrated according to the manufacturer’s specifications and is in defect free condition. Calibration must be performed by an Evident technician or an Evident-authorized specialist.
LEXT OLS5100
The LEXT™ OLS5100 laser scanning microscope combines exceptional accuracy and optical performance with smart tools that make the system easy to use. The tasks of precisely measuring shape and surface roughness at the submicron level are fast and efficient, simplifying your workflow and delivering high-quality data you can trust.