The systematic method of lens design in use today is an interactive technique. By this procedure, based upon the experience of the designer, a basic lens type is first picked. A paraxial thin lens and then a thick lens solution are next developed. Laser remote sensing has become a well-established technique that has been applied in many fields. Laser document scanners are a special class of optical systems that use active components such as a rotating prism or mirror, to move modulated beam across photographic film to build up an image line by line from a video input. Due to the importance of the scanner, the optical systems associated with laser document scanners have been investigated computationally in the present work using a new approach for their design with the aid of "Zemax" software. Optimization processes have been conducted to determine the most favorable optical properties and hence the design specifications of the optical system of laser document scanner. The laser beam source associated with suggested designs of the optical systems is the second harmonic generation of solid-state Nd: YAG laser (λ= 0.532μm) since the scanner is intended for operation in the visible region. The results have been found from Zemax program and also with the aid of MATLAB program. The specifications of the optical systems which have been developed in the present investigations can be practically implemented. The beam resolution obtained from the optimized system is 0.6083x10-6 and is better than the selected original system 0.4418x10-6.