Added schemes

README.md

@@ -8,6 +8,8 @@ For dielectric spheres with a diameter much larger than the wavelength, geometri
 
 A simple geometrical-optical model of a single-beam gradient trap is shown in Fig. 1.
 
+![](images/fig_1.png)
+
 The trap consists of an incident parallel beam of a better arbitrary mode composition and polarization, which falls into a high-aperture micro lens and focuses in focus $f$. The maximum angle of deflection of the rays at the output of a micro lens is determined by its numerical aperture
 
 $$NA = n_1 \cdot \sin{\sigma_A}$$
@@ -96,6 +98,9 @@ It can be seen from the graph that when the particle is displaced from the equil
 
 In the same way, forces acting in the lateral plane can be obtained. Here we consider the $Y$ axis, but the same consideration is valid for displacement along any direction in a plane perpendicular to the direction of the laser beam. However, in this case, new angles appear, shown in Fig. 6.
 
+![Test Caption](images/fig_6.png)
+*Test Caption*
+
 They are determined by the following formulas:
 
 $$\alpha = 90^\circ - \arctan{\frac{r}{f}}$$