\begin{tikzpicture}
  
    \def\raynum{120}

    \foreach \x in {0,...,\raynum} {
        \ifthenelse{\x < 20 \OR \x>100}
        {
            \draw[color = kit-blue100] (\x /\raynum * 6 ,0) -- (3,4);
        }{
            \draw[color = kit-green100] (\x /\raynum * 6 ,0) -- (3,4);
 
        }
    }

    \fill[
        white
    ] (1.49,1) -- (4.51,1) -- (5.01,0) -- (0.99,0) -- cycle;


    \draw [color=kit-blue100] (0,0) -- node[below]{wall} (6,0) ; % wall
    \draw [color=kit-green100](1.5,1) -- node[below]{blocker} (4.5,1); %blocker

    %cam
    \node[
        circle,
        fill = kit-gray70,
        minimum width = 1mm,
        outer sep = 2mm
    ] (camera) at (3,4)  {};
    \node at (camera.north) {camera};

    %magnifier
    \node[
        circle,
        draw
    ] (mag) at (4.5, 1){};


    \fill[
        kit-green100
    ] (7,2) -- (9,2) -- (9,1.7) -- (7,1.7) -- cycle; 

    \draw[kit-blue100] (10,1) coordinate (blue_ray_isec) -- (7,4) coordinate (orig);
    \draw[kit-green100] (8.7,2) coordinate (green_ray_isec) -- (7,4);

    %line
    \draw (mag.north east) -- (7,2);

    %magnifier box
    \draw (7,4) -- (10,4) -- (10,1) -- (7,1) -- cycle;

    \pic [
        draw, 
        ->, 
        "$d\omega$", 
        angle radius=20mm,
        angle eccentricity=1.1,
        pic text options={shift={(3mm,3mm)}}
        ]
        {angle = green_ray_isec--orig--blue_ray_isec};

\end{tikzpicture}