beamer 中数学模式的字体系列

Question

我使用 OpenSans 字体和光字体样式。对于文本有效，但在数学模式下无效。我试过了\setbeamerfont{math text}{series=\fontseries{l}}，但它没有改变任何东西。

我也想在数学模式中使用浅色字体样式。

这是我的 MWE：

\documentclass{beamer}

\usepackage[default, scale=0.95]{opensans}
\usepackage{siunitx}

\setbeamerfont{math text}{series=\fontseries{l}}    % does not change anything
\setbeamerfont{normal text}{series=\fontseries{l}}
\AtBeginDocument{\usebeamerfont{normal text}}

\begin{document}
    \begin{frame}{Some Math and Text}
        here is some text in OpenSans light \\
        but $math\,mode$ is not in light: \si{\micro\second}
    \end{frame}
\end{document}

Answer 1

\documentclass[professionalfonts]{beamer}
\usepackage{kpfonts}
\usepackage[default, scale=0.95]{opensans}
\usepackage{siunitx}

\begin{document}
    \begin{frame}{Some Math and Text}
    here is some text in OpenSans light \\
    but $math\,mode$ is not in light: \si{\micro\second}
\end{frame}
\end{document}

Answer 2

如果你不介意一切都设置为轻量级：

\documentclass{beamer}

\usepackage[default, scale=0.95]{opensans}
\usepackage{siunitx}

\setbeamerfont{math text}{series=\fontseries{l}}    % does not change anything
\setbeamerfont{normal text}{series=\fontseries{l}}
\AtBeginDocument{\usebeamerfont{normal text}}


\renewcommand{\mddefault}{l}

\begin{document}
    \begin{frame}{Some Math and Text}
        here is some text in OpenSans light \\
        but $math\,mode$ is not in light: \si{\micro\second}
    \end{frame}
\end{document}