Optical Systems

Recently, thin films play an outstanding role in developing of science and technologie. Thin films enhance optical, mechanical, and electrical properties of materials by deposition with nanometer or micrometer thickness on various materials. Thin films can enhance the properties of materials, and there are various application fields of industry for thin films because of their capabilities. Thickness of thin films is varied in the range from a few atoms to 100 µm ( < 100 nm or 0,001 µm). Thin films must have appropriate thickness, composition, surface roughness, and characteristic properties to perform own functions.

Determining thickness of thin films using spectrometer is called envelope method. Method is applied considering envelope curve drawn using maximum and minimum points of interference fringes, using optical transmission spectrum of light incoming perpendicular to surface.

Crosslinking Device Keratoconus is a degenerative non inflammatory disease of the cornea. Collagen crosslinking (CCL) treatment increases rigidity and keratectasia resistance of corneal collagen and stops the progression of the disease by increasing cross covalent binding between collagen fibrous in the corneal stroma a result of by photopolymerization occurring riboflavin and UVA reactions. Producing of crosslinking device, which is used for treatment of keratoconus, and enhancing of experimental reliability of this device are evaluated. Crosslinking device can produce UV-A light with specific power and spot size. Energy level can be adjusted from 1 mW up to 10 mW by device producing UV-A light with spot size of 3 MW/cm2 , as different from the patented crosslinking device, and image recording can be made during the application. Experiments of the device were performed on rabbits is seen in the figure. The pathological results of experiments on rabbits are positive. Measurement of Super Hydrophobic Surfaces Contact Angle

New materials and structures originated from technological developments reveal the need for new measurement systems. Super-hydrophobic surfaces are a much-needed structure in industrial and biological applications. Wetting behavior on solid surfaces and surface free energy of solids are obtained by measuring the contact angle of the monolayer.