Abstract

We introduce a multiple order coded aperture (MOCA) spectrometer. The MOCA is a system that uses a multiplex hologram and a coded aperture to increase the spectral range and throughput of the system over conventional spectrometers while maintaining spectral resolution. This results in an order of magnitude reduction in system volume with no loss in resolution.

© 2007 Optical Society of America

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References

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  1. E. Cull, M. E Gehm, D. J. Brady, C. R. Hsieh, O. Momtahan, and A. Adibi. Dispersion multiplexing with broadband filtering for miniature spectrometers. Appl. Opt46, 365–374, January 2007.
  2. E. E. Fenimore and T. M. Cannon. Coded aperture imaging with uniformly redundant arrays. Appl. Opt17, 337–347, February 1978.
  3. W. Hadley Richardson. Bayesian-Based Iterative Method of Image Restoration. Journal of the Optical Society of America (1917-1983), 62, 55 January 1972.
  4. N. J. A. Sloane, T. Fine, P. G. Phillips, and M. Harwit. Codes for multiplex spectrometry. Appl. Opt8, 2103 October 1969.

Adibi, A.

E. Cull, M. E Gehm, D. J. Brady, C. R. Hsieh, O. Momtahan, and A. Adibi. Dispersion multiplexing with broadband filtering for miniature spectrometers. Appl. Opt46, 365–374, January 2007.

Brady, D. J.

E. Cull, M. E Gehm, D. J. Brady, C. R. Hsieh, O. Momtahan, and A. Adibi. Dispersion multiplexing with broadband filtering for miniature spectrometers. Appl. Opt46, 365–374, January 2007.

Cannon, T. M.

E. E. Fenimore and T. M. Cannon. Coded aperture imaging with uniformly redundant arrays. Appl. Opt17, 337–347, February 1978.

Cull, E.

E. Cull, M. E Gehm, D. J. Brady, C. R. Hsieh, O. Momtahan, and A. Adibi. Dispersion multiplexing with broadband filtering for miniature spectrometers. Appl. Opt46, 365–374, January 2007.

Fenimore, E. E.

E. E. Fenimore and T. M. Cannon. Coded aperture imaging with uniformly redundant arrays. Appl. Opt17, 337–347, February 1978.

Fine, T.

N. J. A. Sloane, T. Fine, P. G. Phillips, and M. Harwit. Codes for multiplex spectrometry. Appl. Opt8, 2103 October 1969.

Gehm, M. E

E. Cull, M. E Gehm, D. J. Brady, C. R. Hsieh, O. Momtahan, and A. Adibi. Dispersion multiplexing with broadband filtering for miniature spectrometers. Appl. Opt46, 365–374, January 2007.

Harwit, M.

N. J. A. Sloane, T. Fine, P. G. Phillips, and M. Harwit. Codes for multiplex spectrometry. Appl. Opt8, 2103 October 1969.

Hsieh, C. R.

E. Cull, M. E Gehm, D. J. Brady, C. R. Hsieh, O. Momtahan, and A. Adibi. Dispersion multiplexing with broadband filtering for miniature spectrometers. Appl. Opt46, 365–374, January 2007.

Momtahan, O.

E. Cull, M. E Gehm, D. J. Brady, C. R. Hsieh, O. Momtahan, and A. Adibi. Dispersion multiplexing with broadband filtering for miniature spectrometers. Appl. Opt46, 365–374, January 2007.

Phillips, P. G.

N. J. A. Sloane, T. Fine, P. G. Phillips, and M. Harwit. Codes for multiplex spectrometry. Appl. Opt8, 2103 October 1969.

Richardson, W. Hadley

W. Hadley Richardson. Bayesian-Based Iterative Method of Image Restoration. Journal of the Optical Society of America (1917-1983), 62, 55 January 1972.

Sloane, N. J. A.

N. J. A. Sloane, T. Fine, P. G. Phillips, and M. Harwit. Codes for multiplex spectrometry. Appl. Opt8, 2103 October 1969.

Other (4)

E. Cull, M. E Gehm, D. J. Brady, C. R. Hsieh, O. Momtahan, and A. Adibi. Dispersion multiplexing with broadband filtering for miniature spectrometers. Appl. Opt46, 365–374, January 2007.

E. E. Fenimore and T. M. Cannon. Coded aperture imaging with uniformly redundant arrays. Appl. Opt17, 337–347, February 1978.

W. Hadley Richardson. Bayesian-Based Iterative Method of Image Restoration. Journal of the Optical Society of America (1917-1983), 62, 55 January 1972.

N. J. A. Sloane, T. Fine, P. G. Phillips, and M. Harwit. Codes for multiplex spectrometry. Appl. Opt8, 2103 October 1969.

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Figures (5)

Fig. 1.
Fig. 1.

MOCA Optical Design

Fig. 2.
Fig. 2.

CCD response of a 532 nm monochromatic source

Fig. 3.
Fig. 3.

Overlayed spectrum of a 532nm and a 632nm laser measured with the MOCA.

Fig. 4.
Fig. 4.

Comparison of the spectrum of a neon pen lamp measured with the MOCA and the Ocean Optics reference spectrometer

Fig. 5.
Fig. 5.

Comparison of the spectrum of a fluorescent lamp measured with the MOCA and the Ocean Optics reference spectrometer

Equations (6)

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δλ = Δ p Δ λ L = Δλ N
N = L Δ p
δλ = Δ p 2 Δ λ L 2 = Δλ N
N = L 2 Δ p 2
I = λ C λ , i , j S ̂ m λ
S ̂ m + 1 λ = S ̂ m λ C λ , i , j M i , j I i , j

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