Quick and Easy Measurements of the Inherent Optical Property of Water by Laser

To compare properties of different waters we measured the reflectance of the second harmonic of Nd: YAG laser light through different water samples in the laboratory. To generate realistic images of natural waters one must consider in some details the interaction of light with the water body. The diagrams have been utilized to represent effective parameters in the water’s reflectivity such as: the angle of incidence or the bottom conditions, height of the laser from water surface, wavelength of the laser light, radiant intensities, depth of water and also the impurities of water. The reflectance of the bottom from a mirror at the bottom of an aquarium with different depths of water will depend on the bottom slope relative to the direction of incidence of the laser light and the coating to prevent damaging the mirror against the laser light so it is necessary to change the mirror after several experiments