Abstract

A holographic interferometry technique for the measurement of optical glass homogeneity of plate samples is presented. It is shown that this immersion technique is more accurate than methods used for this purpose based on classical interferometry without the need of quality optics.

© 1991 Optical Society of America

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References

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  1. J. Schwider, R. Burow, K.-E. Elssner, R. Spolaczyk, J. Grzanna, “Homogeneity Testing by Phase Sampling Interferometry,” Appl. Opt. 24, 3059–3061 (1985).
    [CrossRef] [PubMed]
  2. F. E. Roberts, P. Langenbeck, “Homogeneity Evaluation of Very Large Disks,” Appl. Opt. 8, 2311–2314 (1969).
    [CrossRef] [PubMed]
  3. M. V. R. K. Murty, “Newton, Fizeau and Haidinger Interferometers,” in Optical Shop Testing, D. Malacara, Ed. (Wiley, New York, 1978), pp. 29–30.
  4. D. Tentori, D. Salazar, “Hologram Interferometry: Carrier Fringes,” to be published.

1985

1969

Burow, R.

Elssner, K.-E.

Grzanna, J.

Langenbeck, P.

Murty, M. V. R. K.

M. V. R. K. Murty, “Newton, Fizeau and Haidinger Interferometers,” in Optical Shop Testing, D. Malacara, Ed. (Wiley, New York, 1978), pp. 29–30.

Roberts, F. E.

Salazar, D.

D. Tentori, D. Salazar, “Hologram Interferometry: Carrier Fringes,” to be published.

Schwider, J.

Spolaczyk, R.

Tentori, D.

D. Tentori, D. Salazar, “Hologram Interferometry: Carrier Fringes,” to be published.

Appl. Opt.

Other

M. V. R. K. Murty, “Newton, Fizeau and Haidinger Interferometers,” in Optical Shop Testing, D. Malacara, Ed. (Wiley, New York, 1978), pp. 29–30.

D. Tentori, D. Salazar, “Hologram Interferometry: Carrier Fringes,” to be published.

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Figures (5)

Fig. 1
Fig. 1

Parameters used for ray tracing within the cavity formed by two reference mirrors in a Fizeau interferometer. There is a matching fluid between the mirrors and sample.

Fig. 2
Fig. 2

Diagram of the holographic interferometer used for optical homogeneity testing. The glass sample S, diffuser plate D, hologram H, light source L, and optical viewing system V are aligned.

Fig. 3
Fig. 3

Parameters used for ray tracing within the immersion tank in the holographic interferometer. The glass sample is immersed in a matching fluid.

Fig. 4
Fig. 4

Interferogram for a BK7 grade A sample after a rotation of 20°. The sample is within an immersion fluid; refractive index matching is ~10−3. Carrier fringes were introduced.

Fig. 5
Fig. 5

Interferogram for a BK7 grade A sample after a rotation of 20°. The sample is in air. Thickness contributions mainly due to a lack of parallelism obscure the optical homogeneity contribution. No carrier fringes were introduced.

Equations (9)

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O P 1 = 2 ( N T 1 + N t 1 ) ,
O P 2 = 2 ( N T 2 + N t 2 + δ N δ τ ) ,
T 2 = T 1 ± δ T 1 ± δ T 2 ± δ t 1 ± δ t 2 .
T 2 = T 1 δ t 1 δ t 2 .
O P 2 O P 1 = 2 [ ( N + Δ N ) ( ± δ t 1 ± δ t 2 ) + N ( ± δ T 1 ± δ T 2 ) + δ N δ τ + N ( δ t 1 δ t 2 ) ] .
O P 2 O P 1 = 2 ( 2 Δ N δ t + 2 N δ T + δ N s δ τ ) .
L 1 = L 0 + N T + N t ,
L 2 = L 0 + N ( T δ t ) + N ( t ± δ t ) + δ N δ τ .
DCO = Δ N δ t + δ N δ τ .

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