journal of kerbala university

The thermal properties of lenses play an important role in the performance of optical systems. The effects of temperature changes on lens performance are discussed. The comparison between the output results using Zemax and the results obtained from the analytical solution of the equations using by the researchers are performed for describing the change of focal length and the radius of spot energy as a function of temperature depending on the prescription output data from Zemax program for optical glass types using in manufacture process which is contained the following types SK16,SK11 ,F2 , K7 .