Birefringence unevenness inspection of transparent resin molded products
Inspection of transparent resin molded products
Our birefringence measurement products, like PA series, WPA series, including WPA-KAMAKIRI, are widely used for visualization and quantitative evaluation of residual stress distribution, which can cause cracking or degradation of optical performance such as MTF and transmittance degradation.
Internal Stress in Molded Product
Phase difference distribution sensitively reflects differences in molding conditions, making it ideal for process control. Good products (above) and defective products (below) can be compared and quantitatively judged as good or bad.
Visualization of resin flow
During plastic lens molding, when gate distortion extends to the effective diameter, resolving power of the final lens is degraded. Quantitative evaluation enables determination of low distortion molding conditions in a short period of time.
Quality control of processing
Defective drilling of molded products increases residual stress and causes cracks and other defects.
The inspection can be performed in a short time (approx. 1 minute) for quality control of residual stress after processing.
WPA Series WPA-MT
A series that expands the measurement range of phase difference from 0 to 3,500 nm by measuring the distribution of birefringence/phase difference over 3 waves. Separable light source which can be incorporated into inline and measurement stage.
High-speed, high-resolution measurement of birefringence/retardation targeting the low measurement range (0～130nm), for example glass, optical lens, etc.Separable light source which can be incorporated into inline and measurement stage.
PA Series PA-micro / PA-micro-S
This equipment measures birefringence and phase difference with high resolution of 5 million pixels at high speed, for low phase difference with a measurement range of 0 to 130 nm. A type that can measure birefringence with microscope FOV. The included microscope can be selected either Olympus or Nikon
- #Birefringence & stress strain measurement solutions
- #2-D Birefringence Measurement System
- #Birefringence Measurement System