Edit README.md

Power sensor holder for Zeiss Lightsheet 7/README.md

@@ -4,9 +4,11 @@ Power sensor holder developed for Zeiss Light sheet 7. It is compatible with the
 This is used for routine laser power measurements on this Zeiss microscope system.
 
 **3D model of power sensor holder:**
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 <img src="image.png" width=70%>
 
 **Printed holder placed in the microscope:**
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 <img src="image-1.png" width=70%>
 
 ## How to use
@@ -16,12 +18,14 @@ The dimensions of this model are similar to the chambers used for imaging in thi
 To measure laser power from the right-side illumination, place the laser power sensor in the slit on the right side, with the sensor window facing left (user perspective), as shown in the photo:
 
 **Sensor position for right illumination:**
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 <img src="image-2.png" width=70%>
 
 
 To measure laser power from the left-side illumination, place the laser power sensor in the slit on the left side, with the sensor window facing right (user perspective), as shown in the photo:
 
 **Sensor position for right illumination:**
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 <img src="image-3.png" width=70%>
 
 ### Software settings