Ultra-wideband cubic prism polarization beam splitter and preparation method thereof

• Main Authors: WU JIANGBO, JIN BO, AI MANLING, GU PEIFU, YAN YUHONG
• Format: Patent
• Language: Chinese; English
• Published: 22.03.2024
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention discloses an ultra wide band cubic prism polarization beam splitter and a preparation method thereof. The polarization beam splitter comprises a first prism, a second prism, an ultra wide band polarization beam splitting film, optical epoxy glue, an ultra wide band antireflection film, an ultra wide band s light antireflection film and an ultra wide band p light antireflection film. The first prism and the second prism are 45-degree isosceles right-angle prisms with the same size, the first prism sequentially comprises right-angle planes 1a and 1b and an inclined plane 1c, and the second prism comprises right-angle planes 2a and 2b and an inclined plane 2c. The ultra wide band polarization beam splitting film is plated on the inclined plane 2c of the second prism, and the ultra wide band antireflection film, the ultra wide band s light antireflection film and the ultra wide band p light antireflection film are respectively plated on the 2b and 2a of the second prism and the 1b of the first prism