Abstract

We report a dynamic spectral imaging system with spectral band zooming and selection capability that can adapt to different application requirements and significantly reduce the size of the captured spectral image data cube. It employs a diffraction grating to disperse the spectral information of the captured image and uses a dynamic spatial filter at the Fourier plane to select the spectral channel and spectral bandwidth for each spectral image. With a limited fixed spectral channel number, it can provide both coarse and fine spectral image viewing and capture. A prototype spectral imaging system with such spectral band zooming and selection features has been constructed. Spectral zooming from 9to50nm resolution has been demonstrated.

© 2007 Optical Society of America

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References

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  1. W. L. McCracken, in IR & EO Systems Handbook, Vol. 2, S.B.Campana, ed. (SPIE Press, 1993), Chap. 1.
  2. M. Descour and E. Dereniak, Appl. Opt. 34, 4817 (1995).
    [CrossRef] [PubMed]
  3. R. F. Horton, Proc. SPIE 2819, 300 (1996).
    [CrossRef]
  4. VariSpec liquid crystal tunable filter, http://www.cri-inc.com/products/components.asp.
  5. L. Cheng, T. Chao, M. Dowdy, C. LaBaw, J. Mahoney, G. Reyes, and K. Bergman, Proc. SPIE 1874, 224 (1993).
    [CrossRef]
  6. "Spatial light modulator," http://en.wikipedia.org/wiki/Spatial_light_modulator.
  7. J. W. Goodman, Introduction to Fourier Optics (McGraw-Hill, 1996), pp. 78-120.
  8. J. M. Younse, Proc. SPIE 2641, 64 (1995).
    [CrossRef]

1996 (1)

R. F. Horton, Proc. SPIE 2819, 300 (1996).
[CrossRef]

1995 (2)

1993 (1)

L. Cheng, T. Chao, M. Dowdy, C. LaBaw, J. Mahoney, G. Reyes, and K. Bergman, Proc. SPIE 1874, 224 (1993).
[CrossRef]

Bergman, K.

L. Cheng, T. Chao, M. Dowdy, C. LaBaw, J. Mahoney, G. Reyes, and K. Bergman, Proc. SPIE 1874, 224 (1993).
[CrossRef]

Chao, T.

L. Cheng, T. Chao, M. Dowdy, C. LaBaw, J. Mahoney, G. Reyes, and K. Bergman, Proc. SPIE 1874, 224 (1993).
[CrossRef]

Cheng, L.

L. Cheng, T. Chao, M. Dowdy, C. LaBaw, J. Mahoney, G. Reyes, and K. Bergman, Proc. SPIE 1874, 224 (1993).
[CrossRef]

Dereniak, E.

Descour, M.

Dowdy, M.

L. Cheng, T. Chao, M. Dowdy, C. LaBaw, J. Mahoney, G. Reyes, and K. Bergman, Proc. SPIE 1874, 224 (1993).
[CrossRef]

Goodman, J. W.

J. W. Goodman, Introduction to Fourier Optics (McGraw-Hill, 1996), pp. 78-120.

Horton, R. F.

R. F. Horton, Proc. SPIE 2819, 300 (1996).
[CrossRef]

LaBaw, C.

L. Cheng, T. Chao, M. Dowdy, C. LaBaw, J. Mahoney, G. Reyes, and K. Bergman, Proc. SPIE 1874, 224 (1993).
[CrossRef]

Mahoney, J.

L. Cheng, T. Chao, M. Dowdy, C. LaBaw, J. Mahoney, G. Reyes, and K. Bergman, Proc. SPIE 1874, 224 (1993).
[CrossRef]

McCracken, W. L.

W. L. McCracken, in IR & EO Systems Handbook, Vol. 2, S.B.Campana, ed. (SPIE Press, 1993), Chap. 1.

Reyes, G.

L. Cheng, T. Chao, M. Dowdy, C. LaBaw, J. Mahoney, G. Reyes, and K. Bergman, Proc. SPIE 1874, 224 (1993).
[CrossRef]

Younse, J. M.

J. M. Younse, Proc. SPIE 2641, 64 (1995).
[CrossRef]

Appl. Opt. (1)

Proc. SPIE (3)

R. F. Horton, Proc. SPIE 2819, 300 (1996).
[CrossRef]

L. Cheng, T. Chao, M. Dowdy, C. LaBaw, J. Mahoney, G. Reyes, and K. Bergman, Proc. SPIE 1874, 224 (1993).
[CrossRef]

J. M. Younse, Proc. SPIE 2641, 64 (1995).
[CrossRef]

Other (4)

W. L. McCracken, in IR & EO Systems Handbook, Vol. 2, S.B.Campana, ed. (SPIE Press, 1993), Chap. 1.

"Spatial light modulator," http://en.wikipedia.org/wiki/Spatial_light_modulator.

J. W. Goodman, Introduction to Fourier Optics (McGraw-Hill, 1996), pp. 78-120.

VariSpec liquid crystal tunable filter, http://www.cri-inc.com/products/components.asp.

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Figures (5)

Fig. 1
Fig. 1

Schematic of the dynamic spectral imaging system.

Fig. 2
Fig. 2

a, Original image; b1–b6, 6 channel images of center wavelengths at 425, 475, 525, 575, 625, and 675 nm ; c1–c6, 6 spectral images of center wavelengths at 454, 463, 472, 481, 490, and 499 nm .

Fig. 3
Fig. 3

Corresponding spectral widths for images b2 and c3 of Fig. 2.

Fig. 4
Fig. 4

Experimental and theoretical divergent angle dependent spectral resolution at 550 nm with a 0.4 mm slit width.

Fig. 5
Fig. 5

Experimental and theoretical slit width dependent spectral bandwidth at 500 nm center wavelength and 0.57° incident beam divergence angle.

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