Abstract

This paper presents an active optical low-pass filter (AOLPF) capable of changing the resolution of an imaging system on demand in order to remove aliasing noise from a sampling image. This is advantageous over conventional optical low-pass filters, which are fixed image-blurring optical components that are built into the imaging system, in order to remove aliasing in the image. Furthermore, conventional filters smear images regardless of the presence or lack of high spatial frequency, which can exceed the Nyquist limit of the sensor. On the contrary, the proposed AOLPF can dynamically adjust the modulation transfer function of an imaging system to eliminate aliasing artifacts. In addition, this filter can be turned off in the absence of high spatial frequency to maximize resolution and prevent unnecessary blurring of the sampling image.

© 2012 Optical Society of America

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    [CrossRef]
  2. K. Fujisawa, M. Uetsuki, and Y. Nishida, “Grating optical low-pass filter,” Jpn. J. Appl. Phys. 35, 1768–1776 (1996).
    [CrossRef]
  3. C.-S. Go, S. Lim, S. Kim, J.-C. Lee, and Y.-H. Oh, “The modeling and the optimization of a grating optical low-pass filter,” Appl. Phys. B 73, 721–725 (2001).
    [CrossRef]
  4. Y.-H. Oh, C.-S. Go, J.-C. Lee, S. Lim, and S.-H. Kim, “Comparison of a grating optical low-pass filter with a birefringent filter,” Proc. SPIE 4594, 408–416 (2001).
    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
  9. G. D. Boreman, Modulation Transfer Function in Optical and Electro-Optical Systems (SPIE, 2001).
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  12. H. H. Nasse, “How to read MTF curves? Part II” Carl Zeiss, Camera Lens Division, March 2009.

2004 (1)

K. Fliegel, “Modeling and measurement of image sensor characteristics,” Radioengineering 13, 27–34 (2004).

2001 (2)

C.-S. Go, S. Lim, S. Kim, J.-C. Lee, and Y.-H. Oh, “The modeling and the optimization of a grating optical low-pass filter,” Appl. Phys. B 73, 721–725 (2001).
[CrossRef]

Y.-H. Oh, C.-S. Go, J.-C. Lee, S. Lim, and S.-H. Kim, “Comparison of a grating optical low-pass filter with a birefringent filter,” Proc. SPIE 4594, 408–416 (2001).
[CrossRef]

1999 (1)

O. Hadar and G. D. Boreman, “Oversampling requirements for pixilated-imager systems,” Opt. Eng. 38, 782–785 (1999).
[CrossRef]

1996 (1)

K. Fujisawa, M. Uetsuki, and Y. Nishida, “Grating optical low-pass filter,” Jpn. J. Appl. Phys. 35, 1768–1776 (1996).
[CrossRef]

1990 (1)

1974 (1)

D. H. Seib, “Carrier diffusion degradation of modulation transfer function in charge coupled imagers,” IEEE Trans. Electron Devices 21, 210–217 (1974).
[CrossRef]

1954 (1)

Boreman, G. D.

O. Hadar and G. D. Boreman, “Oversampling requirements for pixilated-imager systems,” Opt. Eng. 38, 782–785 (1999).
[CrossRef]

G. D. Boreman, Modulation Transfer Function in Optical and Electro-Optical Systems (SPIE, 2001).

Coltman, J. W.

Dyck, R. H.

R. H. Dyck and W. Steffe, “Effects of optical crosstalk in CCD image sensors,” in Proceedings of the 5th International Conference on Applications of Charge-Coupled Devices (Naval Ocean Systems Center, 1978), pp. 55–61.

Fliegel, K.

K. Fliegel, “Modeling and measurement of image sensor characteristics,” Radioengineering 13, 27–34 (2004).

Fujisawa, K.

K. Fujisawa, M. Uetsuki, and Y. Nishida, “Grating optical low-pass filter,” Jpn. J. Appl. Phys. 35, 1768–1776 (1996).
[CrossRef]

Go, C.-S.

C.-S. Go, S. Lim, S. Kim, J.-C. Lee, and Y.-H. Oh, “The modeling and the optimization of a grating optical low-pass filter,” Appl. Phys. B 73, 721–725 (2001).
[CrossRef]

Y.-H. Oh, C.-S. Go, J.-C. Lee, S. Lim, and S.-H. Kim, “Comparison of a grating optical low-pass filter with a birefringent filter,” Proc. SPIE 4594, 408–416 (2001).
[CrossRef]

Goodman, J. W.

J. W. Goodman, Introduction to Fourier Optics (McGraw-Hill, 1996).

Greivenkamp, J. E.

Hadar, O.

O. Hadar and G. D. Boreman, “Oversampling requirements for pixilated-imager systems,” Opt. Eng. 38, 782–785 (1999).
[CrossRef]

Kim, S.

C.-S. Go, S. Lim, S. Kim, J.-C. Lee, and Y.-H. Oh, “The modeling and the optimization of a grating optical low-pass filter,” Appl. Phys. B 73, 721–725 (2001).
[CrossRef]

Kim, S.-H.

Y.-H. Oh, C.-S. Go, J.-C. Lee, S. Lim, and S.-H. Kim, “Comparison of a grating optical low-pass filter with a birefringent filter,” Proc. SPIE 4594, 408–416 (2001).
[CrossRef]

Lee, J.-C.

C.-S. Go, S. Lim, S. Kim, J.-C. Lee, and Y.-H. Oh, “The modeling and the optimization of a grating optical low-pass filter,” Appl. Phys. B 73, 721–725 (2001).
[CrossRef]

Y.-H. Oh, C.-S. Go, J.-C. Lee, S. Lim, and S.-H. Kim, “Comparison of a grating optical low-pass filter with a birefringent filter,” Proc. SPIE 4594, 408–416 (2001).
[CrossRef]

Lim, S.

Y.-H. Oh, C.-S. Go, J.-C. Lee, S. Lim, and S.-H. Kim, “Comparison of a grating optical low-pass filter with a birefringent filter,” Proc. SPIE 4594, 408–416 (2001).
[CrossRef]

C.-S. Go, S. Lim, S. Kim, J.-C. Lee, and Y.-H. Oh, “The modeling and the optimization of a grating optical low-pass filter,” Appl. Phys. B 73, 721–725 (2001).
[CrossRef]

Nasse, H. H.

H. H. Nasse, “How to read MTF curves? Part II” Carl Zeiss, Camera Lens Division, March 2009.

Nishida, Y.

K. Fujisawa, M. Uetsuki, and Y. Nishida, “Grating optical low-pass filter,” Jpn. J. Appl. Phys. 35, 1768–1776 (1996).
[CrossRef]

Oh, Y.-H.

C.-S. Go, S. Lim, S. Kim, J.-C. Lee, and Y.-H. Oh, “The modeling and the optimization of a grating optical low-pass filter,” Appl. Phys. B 73, 721–725 (2001).
[CrossRef]

Y.-H. Oh, C.-S. Go, J.-C. Lee, S. Lim, and S.-H. Kim, “Comparison of a grating optical low-pass filter with a birefringent filter,” Proc. SPIE 4594, 408–416 (2001).
[CrossRef]

Seib, D. H.

D. H. Seib, “Carrier diffusion degradation of modulation transfer function in charge coupled imagers,” IEEE Trans. Electron Devices 21, 210–217 (1974).
[CrossRef]

Steffe, W.

R. H. Dyck and W. Steffe, “Effects of optical crosstalk in CCD image sensors,” in Proceedings of the 5th International Conference on Applications of Charge-Coupled Devices (Naval Ocean Systems Center, 1978), pp. 55–61.

Uetsuki, M.

K. Fujisawa, M. Uetsuki, and Y. Nishida, “Grating optical low-pass filter,” Jpn. J. Appl. Phys. 35, 1768–1776 (1996).
[CrossRef]

Appl. Opt. (1)

Appl. Phys. B (1)

C.-S. Go, S. Lim, S. Kim, J.-C. Lee, and Y.-H. Oh, “The modeling and the optimization of a grating optical low-pass filter,” Appl. Phys. B 73, 721–725 (2001).
[CrossRef]

IEEE Trans. Electron Devices (1)

D. H. Seib, “Carrier diffusion degradation of modulation transfer function in charge coupled imagers,” IEEE Trans. Electron Devices 21, 210–217 (1974).
[CrossRef]

J. Opt. Soc. Am. (1)

Jpn. J. Appl. Phys. (1)

K. Fujisawa, M. Uetsuki, and Y. Nishida, “Grating optical low-pass filter,” Jpn. J. Appl. Phys. 35, 1768–1776 (1996).
[CrossRef]

Opt. Eng. (1)

O. Hadar and G. D. Boreman, “Oversampling requirements for pixilated-imager systems,” Opt. Eng. 38, 782–785 (1999).
[CrossRef]

Proc. SPIE (1)

Y.-H. Oh, C.-S. Go, J.-C. Lee, S. Lim, and S.-H. Kim, “Comparison of a grating optical low-pass filter with a birefringent filter,” Proc. SPIE 4594, 408–416 (2001).
[CrossRef]

Radioengineering (1)

K. Fliegel, “Modeling and measurement of image sensor characteristics,” Radioengineering 13, 27–34 (2004).

Other (4)

R. H. Dyck and W. Steffe, “Effects of optical crosstalk in CCD image sensors,” in Proceedings of the 5th International Conference on Applications of Charge-Coupled Devices (Naval Ocean Systems Center, 1978), pp. 55–61.

H. H. Nasse, “How to read MTF curves? Part II” Carl Zeiss, Camera Lens Division, March 2009.

G. D. Boreman, Modulation Transfer Function in Optical and Electro-Optical Systems (SPIE, 2001).

J. W. Goodman, Introduction to Fourier Optics (McGraw-Hill, 1996).

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