method-image.md

@@ -3,6 +3,19 @@ Imaging photoelastic samples
 
 In the [previous section](https://git-xen.lmgc.univ-montp2.fr/PhotoElasticity/Main/wikis/method-make) we explain the different ways to make a photoelastic sample. In this section we will show you the different ways to image it considering the optic, dynamic and geometric constraints you can have, and considering want you want to measure.
 
+Using transmission photoelasticity method:
+------------------------------------------
+In the most favourable case you you have optically access to both sides of the sample and can then have light going through from a polarised source to a crossed polarised camera.
+This is a method to image photoelastic material when you have optically access to both sides of the sample. In this case you lit the sample from one side and observe it from the other side. More details about this method are give [here](https://git-xen.lmgc.univ-montp2.fr/PhotoElasticity/Main/wikis/transmission-photoelasticity). 
+
+[here](https://git-xen.lmgc.univ-montp2.fr/PhotoElasticity/Main/wikis/transmission-photoelasticity)
+
+![Capture_du_2019-01-09_13-11-21](uploads/f86accad9f20032a02090f1637a79207/Capture_du_2019-01-09_13-11-21.png)
+
+Using reflection photoelasticity method:
+----------------------------------------
+[here](https://git-xen.lmgc.univ-montp2.fr/PhotoElasticity/Main/wikis/reflection-photoelasticity)
+
 Using different wavelengths:
 ----------------------------
 [here](https://git-xen.lmgc.univ-montp2.fr/PhotoElasticity/Main/wikis/wavelength-imaging)
@@ -12,15 +25,7 @@ Using different wavelengths:
 Picture extracted from [this article](https://aip.scitation.org/doi/abs/10.1063/1.4983049). Red light is used to localized the particles while green one is used to measure the photoelastic response.
 
 
-Using transmission photoelasticity method:
-------------------------------------------
-[here](https://git-xen.lmgc.univ-montp2.fr/PhotoElasticity/Main/wikis/transmission-photoelasticity)
 
-![Capture_du_2019-01-09_13-11-21](uploads/f86accad9f20032a02090f1637a79207/Capture_du_2019-01-09_13-11-21.png)
-
-Using reflection photoelasticity method:
-----------------------------------------
-[here](https://git-xen.lmgc.univ-montp2.fr/PhotoElasticity/Main/wikis/reflection-photoelasticity)
 
 Using terahertz photoelasticity method:
 ---------------------------------------
@@ -43,10 +48,8 @@ Using polarizers properly:
 Should I use a circular or a linear polarizer? Should I add a quater-wave plate? How to orient the whole thing and check that I did it properly? [This section](https://git-xen.lmgc.univ-montp2.fr/PhotoElasticity/Main/wikis/tuning-polariser) gives details about all these points.
 
 
-Transmission photoelasticy:
----------------------------
 
-This is a method to image photoelastic material when you have optically access to both sides of the sample. In this case you lit the sample from one side and observe it from the other side. More details about this method are give [here](https://git-xen.lmgc.univ-montp2.fr/PhotoElasticity/Main/wikis/transmission-photoelasticity). 
+
 
 
 Reflection photoelasticy: