ISSN: 1813-0410

Keywords : Fourier transform


Design holographic gratings using Fourier transform

Khawla j. tahir

journal of kerbala university, Volume 10, Issue 0, Pages 39-47

In the present work we have designed a computer generated holograms using Fourier Transform .The grating was printed on the transparent paper to obtain a grating lines number (300,600,1200,2400) line/mm. The most important factors that depend on the efficiency of grating such as lines number, diffraction orders and diffraction angle have been studied. The highest efficiency was 90%(for grating lines number 2400 line/mm) fringe spacing 0.8333 µm and angle of diffraction 18˚.The grating is used to analyze the spectrum of halogen lamp and to test aspheric mirrors.