Optical systems

US12007595B2 · kind B2 · utility

Inventors

• John D. Le · Woodbury, US
• Gregg A. Ambur · River Falls, US
• Zhisheng Yun · Woodbury, US
• Robert M. Jennings · Oldwick, US
• Arthur L. Kotz · Mahtomedi, US
• Timothy L. Wong · Windom, US
• David T. Yust · Woodbury, US
• Timothy J. Nevitt · Red Wing, US
• Kayla A. McGrath · Cottage Grove, US

Key dates

• Filing date: Nov 16, 2021
• Grant date: Jun 11, 2024
• Expiry date: Nov 16, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B1/041
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical assembly includes an integral lens assembly having one or more lenses bonded to each other with spaced apart major first and second lens surfaces. First and second optical films are bonded to respective major first and second lens surfaces. The first and second optical films includes a plurality of polymeric layers. Each of the polymeric layers have an average thickness of less than about 500 nm. For a substantially normally incident light and a visible wavelength range the plurality of polymeric layers in the first optical film has an average optical transmittance and an average optical reflectance of greater than about 70% for a first polarization state and an orthogonal second polarization state, respectively. The plurality of polymeric layers in the second optical film has an average optical transmittance of greater than about 70% for at least one of the first and second polarization states.