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The Characteristics of Computer-Generated Holographic Optical Low-Pass Filter

컴퓨터로 설계한 홀로그램 광 저대역 필터의 특성 분석

  • 김인길 (원광대학교 물리반도체학부) ;
  • 고춘수 (원광대학교 물리반도체학부) ;
  • 임성우 (원광대학교 물리반도체학부) ;
  • 오용호 (원광대학교 물리반도체학부) ;
  • 이재철 (원광대학교 물리반도체학부)
  • Published : 2003.12.01

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.

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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