Changes between Version 1 and Version 2 of PhysicsOfOWL

Timestamp:

Sep 1, 2016, 8:26:07 AM (9 years ago)

Author:

indrek

Comment:

--

PhysicsOfOWL

@@ -1 +1 @@
 = Physics of OWL^TM^ =
 == Indtroduction ==
+[[Image(Lidar on ship.png, right, 200px, top)]]
+The OWL (Oil in Water Locator) is a complex and highly sensitive measurement
+device that is able to quantify organic molecules in water. These include
+different oils and Dissolved Organic Material - DOM. An overview of the measurement
+process and the physics principles responsible for device operation are given
+in layman terms.
 
+
+
+== Fluorescence ==
+
+Fluorescence is the property of some molecules to emit light in effect of light
+of higher frequency. The light spectrum that the molecule produces when fluorescing
+is highly dependent on molecule structure and components. This in turn allows us
+to discriminate between different molecules in water. Also, the fluorescent light
+strength that emits from the water is proportional to the amount of fluorescing
+molecules in the water.
+
+For more detailed information please see the Wikipedia page on fluorescence.
+https://en.wikipedia.org/wiki/Fluorescence
+
+== Laser ==
+
+The laser in the Measurement device is used to excite the oil and other organic
+molecules in the water. The laser is an EXIMER type!NaCl gas laser. The laser emits
+a very well focused pulse of ultraviolet light that excite the molecules. The laser
+type was selected so it would produce the most useful fluorescent light spectrum
+from the molecules of interest.
+
+== Detection ==
+
+[[Image(Optical schematic.png​, right, 250px)]]
+As the light emits from the molecules of interest it travels in all directions. This
+means that only a very small percentage of the light makes it back to the
+Measurement device. For detecting that light the Measurement device has a built in
+telescope for collecting the light. After the telescope the light is divided into
+different spectral components, amplified and then detected with a camera.
+
+== Data processing ==
+
+When the light spectrum is collected and stored as digital data analyzis of the sample
+begins. 
+[[Image(Data processing.PNG, 300px)]]
+
+In the firs step the spectrum is divided into spectrum's of different molecules.
+This is done by specialized artificial intelligent. After that the shape of spectrum's
+and their magnitude is used to calculate the ammount of giver substance in the water.
+This is done in real time and posted on the OWL MAP^TM^.