OPTICAL ELEMENT, PRODUCTION METHOD THEREOF, AND PROJECTION IMAGE DISPLAY DEVICE

    公开(公告)号:US20210165151A1

    公开(公告)日:2021-06-03

    申请号:US17105739

    申请日:2020-11-27

    Abstract: An optical element including a substrate that is transparent to light at a using wavelength band, an antireflection layer, a matching layer, and a birefringent layer formed of an oblique angle vapor deposition film, wherein an optical loss in the optical element at the using wavelength band is 1.0% or less, and the optical loss is calculated using the following formulae from intensity of transmitted light and intensity of reflected light measured by S-polarized light at an incident angle of 5° in the optical element, Transmittance=intensity of transmitted light/intensity of incident light (%) Reflectance=intensity of reflected light/intensity of incident light (%) Optical loss (%)=100%−transmittance (%)−reflectance (%).

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