Abstract

Since the grating optical low-pass fillet degrades the resolution of images, we developed a hologram optical low-pass filter that show low degradation of the image and studied its characteristics. We designed the hologram that divides input beam into circular shaped 21 beams with a Monte-Carlo based hologram generation program and calculated its MTE characteristics to compare it with that of a grating filter. The hologram was manufactured through the optical lithography process and attached to a digital imaging device (Zoran 732212) for measurement. The moirfiltering is compared with zone plate images and the resolution loss is measured with USAF resolution chart. The hologram optical low-pass filter showed better characteristics in both moly filtering and resolution.

Keywords

• Holographic optical low-pass filter(HOLF);
• Grating optical low-pass filter;
• Moire;
• Moire fringe;
• Aliasing;
• Resolution of imaging system

File

Download PDF

References

1. Linear Systems, Fourier Transforms, and Optics J.D.Gaskill
2. Proc. SPIE v.476 Birefringment optical low-pass filter A.Nordbryhn
3. U. S. Patent 4761682 Optical low-pass filter including 3-crystal plates for solid state color-TV camera T.Asaida
4. Appl. Opt. v.29 Color dependent optical frefilter for the suppression of aliasing artifacts J.E.Greivenkamp https://doi.org/10.1364/AO.29.000676
5. Jpn. J. Appl. Phys. v.35 Grating optical low-pass filter K.Fusisawa;M.Uetsiki;Y.Nishida https://doi.org/10.1143/JJAP.35.1768
6. Appl. Phys. v.B 73 The modeling and the optimization of a grating optical low-pass filter C.S.Go;S.Lim;S.H.Kim;J.C.Lee;Y.H.Oh
7. Appl. Phys. v.B. 74 The filtering characteristics of simple grating optical low-pass filter J.C.Lee;S.Lim;S.H.Kim;Y.H.Oh;C.S.Go
8. Introduction to Fourier Optics J.W.Goodman

Cited by

1. Spatial-frequency-filtering effect of multiphase holograms vol.39, pp.8, 2007, https://doi.org/10.1016/j.optlastec.2007.01.005