METHOD FOR DESIGNING DIFFRACTION SUPPRESSION OPTICAL COMPONENT, DISPLAY SCREEN AND UNDER-SCREEN CAMERA APPARATUS

• Main Authors: WU, Hao, DOU, Chenhao, FAN, Zhenato, ZHANG, Kai, FENG, Hui, TIAN, Kehan
• Format: Patent
• Language: English
• Published: 11.05.2023
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; TELEPHONIC COMMUNICATION

A method for designing a phase-typed diffraction suppressing optical device (12) for a transparent display screen (11) is disclosed, which comprises: acquiring a light field complex amplitude distribution U(x2,y2,d)=A(x2,y2,d)exp(iφ20(x2,y2,d)) on a plane with a distance d from the transparent display screen (12) after a plane wave is transmitted through the screen; and designing the diffraction suppressing optical device (12), so that it has a transmittance function t2 (x2,y2)=exp(iφ21(x2,y2)) and satisfies φ20 (x2,y2,d)+φ21 (x2,y2)=C, where C is a constant. A diffraction suppressing optical device (12) and an under-screen camera apparatus (1) comprising the same are disclosed. The phase-typed diffraction suppressing optical device (12) suppresses the diffraction effect in the under-screen camera apparatus (1) by providing phase modulation, thereby improving the quality of under-screen imaging.