缺陷检查方法及缺陷检查装置
By employing a specific angle configuration of polarizers and phase difference compensation plates in an optical film with protective and release films stacked on a linear polarizer, the problem of detecting uneven optical properties was solved, achieving high-precision defect detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SUMITOMO CHEM CO LTD
- Filing Date
- 2022-03-01
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies struggle to detect the unevenness of optical properties when protective and release films are stacked on a linear polarizing plate, and the detection accuracy is reduced due to the influence of birefringence.
A polarizer and a phase difference compensation plate are configured at a specific angle. The first polarizer, the phase difference compensation plate, the optical film, and the second polarizer are sequentially arranged through the optical axis of the optical film. The phase difference compensation plate is used to compensate for the birefringence of the stripping film and to detect defects in the optical film.
It can accurately detect the non-uniformity of optical properties of optical films, improve the accuracy and reliability of defect detection, and reduce the birefringence effect of protective films and release films.
Smart Images
Figure CN115015281B_ABST