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References

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  1. O. W. Richards, Highway Res. Abstr. 23, 32 (1953).
  2. O. W. Richards, Visual Needs and Possibilities for Night Automobile Driving (American Optical Co. Rep. CPR-11-3965, U.S. Bur. Publ. Roads, Aug.1967).
  3. H. L. Henderson, T. Kole, H. J. Sheppard, Amer. J. Optometry 45, 170 (1968).
    [CrossRef]
  4. L. A. Webster, F. R. Yeatman, Engineer. Exp. Sta. Bull.496, University of Illinois.
  5. F. C. Howe, U.S. Pat.1,239,691 (11September1917).
  6. A. Ordorica, U.S. Pat.2,230,009 (28January1941).
  7. E. Lenattier, French Pat.1,134,943 (19April1957).
  8. W. E. Bryan, Highway Res. Board Bull. 336, 104 (1962).
  9. Soc. Autom. Eng. Handbook, (SAE J579a) pp. 722–723; Lighting Inspection Code (J599a, 1967) p. 739.

1968 (1)

H. L. Henderson, T. Kole, H. J. Sheppard, Amer. J. Optometry 45, 170 (1968).
[CrossRef]

1962 (1)

W. E. Bryan, Highway Res. Board Bull. 336, 104 (1962).

1953 (1)

O. W. Richards, Highway Res. Abstr. 23, 32 (1953).

Bryan, W. E.

W. E. Bryan, Highway Res. Board Bull. 336, 104 (1962).

Henderson, H. L.

H. L. Henderson, T. Kole, H. J. Sheppard, Amer. J. Optometry 45, 170 (1968).
[CrossRef]

Howe, F. C.

F. C. Howe, U.S. Pat.1,239,691 (11September1917).

Kole, T.

H. L. Henderson, T. Kole, H. J. Sheppard, Amer. J. Optometry 45, 170 (1968).
[CrossRef]

Lenattier, E.

E. Lenattier, French Pat.1,134,943 (19April1957).

Ordorica, A.

A. Ordorica, U.S. Pat.2,230,009 (28January1941).

Richards, O. W.

O. W. Richards, Highway Res. Abstr. 23, 32 (1953).

O. W. Richards, Visual Needs and Possibilities for Night Automobile Driving (American Optical Co. Rep. CPR-11-3965, U.S. Bur. Publ. Roads, Aug.1967).

Sheppard, H. J.

H. L. Henderson, T. Kole, H. J. Sheppard, Amer. J. Optometry 45, 170 (1968).
[CrossRef]

Webster, L. A.

L. A. Webster, F. R. Yeatman, Engineer. Exp. Sta. Bull.496, University of Illinois.

Yeatman, F. R.

L. A. Webster, F. R. Yeatman, Engineer. Exp. Sta. Bull.496, University of Illinois.

Amer. J. Optometry (1)

H. L. Henderson, T. Kole, H. J. Sheppard, Amer. J. Optometry 45, 170 (1968).
[CrossRef]

Highway Res. Abstr. (1)

O. W. Richards, Highway Res. Abstr. 23, 32 (1953).

Highway Res. Board Bull. (1)

W. E. Bryan, Highway Res. Board Bull. 336, 104 (1962).

Other (6)

Soc. Autom. Eng. Handbook, (SAE J579a) pp. 722–723; Lighting Inspection Code (J599a, 1967) p. 739.

O. W. Richards, Visual Needs and Possibilities for Night Automobile Driving (American Optical Co. Rep. CPR-11-3965, U.S. Bur. Publ. Roads, Aug.1967).

L. A. Webster, F. R. Yeatman, Engineer. Exp. Sta. Bull.496, University of Illinois.

F. C. Howe, U.S. Pat.1,239,691 (11September1917).

A. Ordorica, U.S. Pat.2,230,009 (28January1941).

E. Lenattier, French Pat.1,134,943 (19April1957).

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Figures (2)

Fig. 1
Fig. 1

Rear-view of partially absorbent eyeglasses, shown as driver is looking through them.

Fig. 2
Fig. 2

Geometric relationship between two cars approaching each other.

Equations (8)

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d = a / sin θ and d 2 ( sin 2 θ / a 2 ) = 1.
E = b θ m ,
E = ( b θ m ) ( d 2 ) ( sin 2 θ / a 2 ) ,
E = [ ( b ) ( d 2 ) / a 2 ] θ m sin 2 θ .
d E d θ = ( b ) ( d 2 ) a 2 [ θ m ( 2 sin θ cos θ ) + sin 2 θ ( m θ m 1 ) ] = ( b ) ( d 2 ) a 2 [ ( sin θ ) ( θ m 1 ) ( θ ) ( 2 cos θ ) + ( sin θ ) ( θ m 1 ) ( sin θ ) ( m ) ] = ( b ) ( d 2 ) a 2 ( sin θ ) ( θ m 1 ) ( 2 θ cos θ + m sin θ ) .
2 θ cos θ + m sin θ = 0.
2 θ cos θ 1.864 sin θ = 0 θ cos θ = 0.932 sin θ θ ctg θ = 0.932 .
θ max 25 °

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