Abstract

Experimental and theoretical studies of the recently patented prism light guide are described [ L. A. Whitehead, U.S. Patent 4,260,220 ( 7 Apr. 1981)]. This device combines the total internal reflection of optical fibers with the low attenuation of air transmission of light. Since it can be moulded from acrylic plastic, the cost of the guide is low enough to make large-scale interior illumination with piped light feasible.

© 1982 Optical Society of America

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References

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  1. W. Wheeler, U.S. Patent247,229 (20Sept.1881).
  2. J. B. Aizenberg, G. B. Bukham, V. M. Pjatigorsky, CIE Session 18 (1976), p. 75-29.
  3. N. C. Rodgers, IES Light. Rev. 137 (Dec.1979).
  4. M. A. Duguay, R. M. Edgar, Appl. Opt. 16, 1444 (1977).
    [CrossRef] [PubMed]
  5. M. A. Duguay, Am. Sci. 422 (1977).
  6. M. A. Duguay, G. D. Aumiller, Appl. Opt. 18, 2081 (1979).
    [CrossRef] [PubMed]
  7. L. A. Whitehead, U.S. Patent4,260,220 (7Apr.1981).
  8. L. A. Whitehead, submitted to Appl. Opt.

1979 (2)

1977 (2)

1976 (1)

J. B. Aizenberg, G. B. Bukham, V. M. Pjatigorsky, CIE Session 18 (1976), p. 75-29.

Aizenberg, J. B.

J. B. Aizenberg, G. B. Bukham, V. M. Pjatigorsky, CIE Session 18 (1976), p. 75-29.

Aumiller, G. D.

Bukham, G. B.

J. B. Aizenberg, G. B. Bukham, V. M. Pjatigorsky, CIE Session 18 (1976), p. 75-29.

Duguay, M. A.

Edgar, R. M.

Pjatigorsky, V. M.

J. B. Aizenberg, G. B. Bukham, V. M. Pjatigorsky, CIE Session 18 (1976), p. 75-29.

Rodgers, N. C.

N. C. Rodgers, IES Light. Rev. 137 (Dec.1979).

Wheeler, W.

W. Wheeler, U.S. Patent247,229 (20Sept.1881).

Whitehead, L. A.

L. A. Whitehead, U.S. Patent4,260,220 (7Apr.1981).

L. A. Whitehead, submitted to Appl. Opt.

Am. Sci. (1)

M. A. Duguay, Am. Sci. 422 (1977).

Appl. Opt. (2)

CIE Session 18 (1)

J. B. Aizenberg, G. B. Bukham, V. M. Pjatigorsky, CIE Session 18 (1976), p. 75-29.

IES Light. Rev. (1)

N. C. Rodgers, IES Light. Rev. 137 (Dec.1979).

Other (3)

W. Wheeler, U.S. Patent247,229 (20Sept.1881).

L. A. Whitehead, U.S. Patent4,260,220 (7Apr.1981).

L. A. Whitehead, submitted to Appl. Opt.

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Figures (4)

Fig. 1
Fig. 1

Cross-sectional and isometric views of the prism light guide.

Fig. 2
Fig. 2

Enlarged view of cross section of prism light guide wall.

Fig. 3
Fig. 3

Apparatus for measuring luminous flux at various points in the light guide.

Fig. 4
Fig. 4

Graph of −ln(I/I0) vs distance D down the pipe. I = luminous flux at D; I0 = luminous flux at D = 0; collimation angle = 10°.

Equations (5)

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θ max = cos - 1 [ 1 - n 2 sin 2 ( π / 8 ) 1 - sin 2 ( π / 8 ) ] 1 / 2 ,
d ln I d z = ( 0.55 ) c θ c l w + ( 2.9 ) l k θ c w + ( 2.0 ) σ z θ c w + ( 20 ) σ p θ c w + ( 1.7 ) s θ c w .
d N d z = 8 3 π θ c w ,
L r = ( 0.65 ) c l + ( 3.4 ) l k + ( 2.3 ) σ z + ( 24 ) σ p + ( 2.0 ) s .
k = 0.15 m - 1 ; c = 10 μ m ; σ z = 0.019 rad ; W = 130 mm ; σ p = 0.001 rad ; l = 4.5 mm . f = 0.02 ;

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