Abstract

According to the spectral distribution of a laser illuminator and the reflectivity of the objects, the reflective spectral distributions of dark green paint, rough concrete, and green vegetation under laser radiation are deduced for a low-light-level night-vision system with a laser illuminator. The spectral-matching factors of Super S25 and New S25 photocathodes for dark green paint, rough concrete, and green vegetation are calculated and compared. The results show that the evaluation of visual range for a night-vision system with a laser illuminator under field circumstances is greatly influenced by the spectral-matching factor.

© 2010 Optical Society of America

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References

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  1. G. Giakoumakis, “Matching factors for various light-source-photodetector combinations,” Appl. Phys. A 52, 210 (1991).
    [CrossRef]
  2. J. C. Minga and B. D. Bhave, “Spectral matching considerations in estimating the field performance of low light level imaging systems,” Appl. Opt. 23, 1628-1631 (1984).
    [CrossRef]
  3. E. H. Eberhardt, “Source-detector spectral-matching factors,” Appl. Opt. 7, 2037-2047 (1968).
    [CrossRef]
  4. W. Li and B. Chang, “Spectral matching factors of GaAs photocathode for reflecting spectrums of scenes,” Acta Photonica Sin. 28, 857-859 (1999).
  5. L. Liu and B. Chang, “Spectral matching factors between Super S25 and New S25 photocathodes and reflective radiation of objects,” Appl. Opt. 43,616-619 (2004).
    [CrossRef]
  6. H.-g. Di and L. Liu, “The research of spectral-matching factors under the laser aids,” Acta Photonica Sin. 35, 214-216(2006).
  7. L. Liu, “Visual range evaluation of LLL night-vision system with laser illuminator [D],” Ph.D. dissertation (Nanjing University of Science and Technology, 2005), pp. 88-91.
  8. B. K. Chang, X. Q. Du, L. Liu, Z. Zhong, R. Fu, and Y. Qian, “The automatic recording system of dynamic spectral response and its applications,” Proc. SPIE 5209, 209-218 (2003).
  9. L. Liu and B. Chang, “New apparent distance-detecting equation for low-light-level imaging system,” Opt. Eng. 43, 415-419 (2004).
  10. L. Liu, B. Chang, and W. Li, “Visual range of low-light-level night vision goggles for driving,” Opt. Eng. 42, 2056-2061(2003).

2006 (1)

H.-g. Di and L. Liu, “The research of spectral-matching factors under the laser aids,” Acta Photonica Sin. 35, 214-216(2006).

2004 (2)

L. Liu and B. Chang, “New apparent distance-detecting equation for low-light-level imaging system,” Opt. Eng. 43, 415-419 (2004).

L. Liu and B. Chang, “Spectral matching factors between Super S25 and New S25 photocathodes and reflective radiation of objects,” Appl. Opt. 43,616-619 (2004).
[CrossRef]

2003 (2)

L. Liu, B. Chang, and W. Li, “Visual range of low-light-level night vision goggles for driving,” Opt. Eng. 42, 2056-2061(2003).

B. K. Chang, X. Q. Du, L. Liu, Z. Zhong, R. Fu, and Y. Qian, “The automatic recording system of dynamic spectral response and its applications,” Proc. SPIE 5209, 209-218 (2003).

1999 (1)

W. Li and B. Chang, “Spectral matching factors of GaAs photocathode for reflecting spectrums of scenes,” Acta Photonica Sin. 28, 857-859 (1999).

1991 (1)

G. Giakoumakis, “Matching factors for various light-source-photodetector combinations,” Appl. Phys. A 52, 210 (1991).
[CrossRef]

1984 (1)

1968 (1)

Bhave, B. D.

Chang, B.

L. Liu and B. Chang, “Spectral matching factors between Super S25 and New S25 photocathodes and reflective radiation of objects,” Appl. Opt. 43,616-619 (2004).
[CrossRef]

L. Liu and B. Chang, “New apparent distance-detecting equation for low-light-level imaging system,” Opt. Eng. 43, 415-419 (2004).

L. Liu, B. Chang, and W. Li, “Visual range of low-light-level night vision goggles for driving,” Opt. Eng. 42, 2056-2061(2003).

W. Li and B. Chang, “Spectral matching factors of GaAs photocathode for reflecting spectrums of scenes,” Acta Photonica Sin. 28, 857-859 (1999).

Chang, B. K.

B. K. Chang, X. Q. Du, L. Liu, Z. Zhong, R. Fu, and Y. Qian, “The automatic recording system of dynamic spectral response and its applications,” Proc. SPIE 5209, 209-218 (2003).

Di, H.-g.

H.-g. Di and L. Liu, “The research of spectral-matching factors under the laser aids,” Acta Photonica Sin. 35, 214-216(2006).

Du, X. Q.

B. K. Chang, X. Q. Du, L. Liu, Z. Zhong, R. Fu, and Y. Qian, “The automatic recording system of dynamic spectral response and its applications,” Proc. SPIE 5209, 209-218 (2003).

Eberhardt, E. H.

Fu, R.

B. K. Chang, X. Q. Du, L. Liu, Z. Zhong, R. Fu, and Y. Qian, “The automatic recording system of dynamic spectral response and its applications,” Proc. SPIE 5209, 209-218 (2003).

Giakoumakis, G.

G. Giakoumakis, “Matching factors for various light-source-photodetector combinations,” Appl. Phys. A 52, 210 (1991).
[CrossRef]

Li, W.

L. Liu, B. Chang, and W. Li, “Visual range of low-light-level night vision goggles for driving,” Opt. Eng. 42, 2056-2061(2003).

W. Li and B. Chang, “Spectral matching factors of GaAs photocathode for reflecting spectrums of scenes,” Acta Photonica Sin. 28, 857-859 (1999).

Liu, L.

H.-g. Di and L. Liu, “The research of spectral-matching factors under the laser aids,” Acta Photonica Sin. 35, 214-216(2006).

L. Liu and B. Chang, “New apparent distance-detecting equation for low-light-level imaging system,” Opt. Eng. 43, 415-419 (2004).

L. Liu and B. Chang, “Spectral matching factors between Super S25 and New S25 photocathodes and reflective radiation of objects,” Appl. Opt. 43,616-619 (2004).
[CrossRef]

B. K. Chang, X. Q. Du, L. Liu, Z. Zhong, R. Fu, and Y. Qian, “The automatic recording system of dynamic spectral response and its applications,” Proc. SPIE 5209, 209-218 (2003).

L. Liu, B. Chang, and W. Li, “Visual range of low-light-level night vision goggles for driving,” Opt. Eng. 42, 2056-2061(2003).

L. Liu, “Visual range evaluation of LLL night-vision system with laser illuminator [D],” Ph.D. dissertation (Nanjing University of Science and Technology, 2005), pp. 88-91.

Minga, J. C.

Qian, Y.

B. K. Chang, X. Q. Du, L. Liu, Z. Zhong, R. Fu, and Y. Qian, “The automatic recording system of dynamic spectral response and its applications,” Proc. SPIE 5209, 209-218 (2003).

Zhong, Z.

B. K. Chang, X. Q. Du, L. Liu, Z. Zhong, R. Fu, and Y. Qian, “The automatic recording system of dynamic spectral response and its applications,” Proc. SPIE 5209, 209-218 (2003).

Acta Photonica Sin. (2)

W. Li and B. Chang, “Spectral matching factors of GaAs photocathode for reflecting spectrums of scenes,” Acta Photonica Sin. 28, 857-859 (1999).

H.-g. Di and L. Liu, “The research of spectral-matching factors under the laser aids,” Acta Photonica Sin. 35, 214-216(2006).

Appl. Opt. (3)

Appl. Phys. A (1)

G. Giakoumakis, “Matching factors for various light-source-photodetector combinations,” Appl. Phys. A 52, 210 (1991).
[CrossRef]

Opt. Eng. (2)

L. Liu and B. Chang, “New apparent distance-detecting equation for low-light-level imaging system,” Opt. Eng. 43, 415-419 (2004).

L. Liu, B. Chang, and W. Li, “Visual range of low-light-level night vision goggles for driving,” Opt. Eng. 42, 2056-2061(2003).

Proc. SPIE (1)

B. K. Chang, X. Q. Du, L. Liu, Z. Zhong, R. Fu, and Y. Qian, “The automatic recording system of dynamic spectral response and its applications,” Proc. SPIE 5209, 209-218 (2003).

Other (1)

L. Liu, “Visual range evaluation of LLL night-vision system with laser illuminator [D],” Ph.D. dissertation (Nanjing University of Science and Technology, 2005), pp. 88-91.

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Figures (6)

Fig. 1
Fig. 1

Performance curves of laser diode L081T 300 m .

Fig. 2
Fig. 2

Relative intensity curve of laser diode L081T 300 m .

Fig. 3
Fig. 3

Reflectivity curve of three types of target.

Fig. 4
Fig. 4

Relative spectral distribution curve of the reflected laser radiation.

Fig. 5
Fig. 5

Spectral sensitivity curves of three kinds of photocathode.

Fig. 6
Fig. 6

Optical path of the laser beam.

Tables (5)

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Table 1 Parameters of the Laser Diode L081T300m

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Table 2 Spectral Distribution of the Night-Sky Radiation and Reflectance of Common Materials

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Table 3 Spectral-Matching Factors of S 25 Photocathode for Scenes

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Table 4 Some Parameters of the System with the Laser Illuminator

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Table 5 Theoretical Computation Results of Visual Range for the System, With and Without the Laser Illuminator

Equations (10)

Equations on this page are rendered with MathJax. Learn more.

ω λ = ρ λ ( P sky λ + P laser λ ) ,
ω ( λ ) = ω λ ω m .
α = ω ( λ ) S ( λ ) d λ ω ( λ ) d λ ,
τ = exp ( 0.3431 × 10 3 R ) ,
α = S ( λ ) ω ( λ ) d λ ω ( λ ) d λ = S ( λ ) [ ρ ( λ ) ( P sky ( λ ) + P laser ( λ ) ) ] Δ λ [ ρ ( λ ) ( P sky ( λ ) + P laser ( λ ) ) ] Δ λ .
A k = 0.716 × 10 3 C 0 C d M ( A k ) D Φ min f o β ( G ) [ S A α λ t ε ρ ¯ E 0 τ o τ d F Φ ] 1 / 2 ,
R = f o A k H t N e ,
O = π R 2 sin θ sin φ = π R 2 sin ( π 36 ) sin ( π 180 ) sin 0.0048 R 2 .
E 0 = P K τ L τ π R 2 sin θ sin φ ,
E 0 = P K τ L τ O = P K τ L τ π R 2 sin θ sin φ = 50 K τ L exp ( 0.3431 × 10 3 × R ) × 10 3 0.0048 R 2 .

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