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References

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  1. R. S. Longhurst, Geometrical and Physical Optics (Wiley, New York, 1964), p. 21.
  2. Ref. 1, p.68.

Longhurst, R. S.

R. S. Longhurst, Geometrical and Physical Optics (Wiley, New York, 1964), p. 21.

Other (2)

R. S. Longhurst, Geometrical and Physical Optics (Wiley, New York, 1964), p. 21.

Ref. 1, p.68.

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Figures (4)

Fig. 1
Fig. 1

Incident and reflected beams of He–Ne laser on the optical surface.

Fig. 2
Fig. 2

(a) Schematic side view of the experimental setup required. (b) Actual experimental setup used.

Fig. 3
Fig. 3

(a) Surface without rotation. (b) Surface under test rotated and beam of light at the screen remains at same position with reference to (a).

Fig. 4
Fig. 4

Parameters used for the determination of some practical characteristics of the technique; (c.c.) = center of curvature.

Equations (3)

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Y F = 2 sin θ [ r 2 ( S sin θ ) 2 ] 1 / 2 r 2 ( S sin θ ) 2 × { l + S ( 1 cos θ ) ( S sin θ ) 2 / r 1 + [ 1 ( S sin θ ) 2 r ] } 1 / 2
Y F 2 S r sin θ .
Δ Y F 2 D r Δ S = 2 Δ S f / No . .

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