Abstract

A simple and inexpensive imaging device is described adaptable to ir, microwave, or ultrasound radiation. An image is projected on a heat-sensitive surface which expands in proportion to the intensity of the radiation. The resulting bas-relief is recorded by double exposure holography.

© 1970 Optical Society of America

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References

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  1. G. W. McDaniel, D. Z. Robinson, Appl. Opt. 1, 311 (1962).
    [CrossRef]
  2. R. Bowling Barnes, Appl. Opt. 7, 1673 (1968).
    [CrossRef]
  3. L. O. Heflinger, R. F. Wuerker, R. E. Brooks, J. Appl. Phys. 37, 642 (1966).
    [CrossRef]

1968 (1)

1966 (1)

L. O. Heflinger, R. F. Wuerker, R. E. Brooks, J. Appl. Phys. 37, 642 (1966).
[CrossRef]

1962 (1)

Bowling Barnes, R.

Brooks, R. E.

L. O. Heflinger, R. F. Wuerker, R. E. Brooks, J. Appl. Phys. 37, 642 (1966).
[CrossRef]

Heflinger, L. O.

L. O. Heflinger, R. F. Wuerker, R. E. Brooks, J. Appl. Phys. 37, 642 (1966).
[CrossRef]

McDaniel, G. W.

Robinson, D. Z.

Wuerker, R. F.

L. O. Heflinger, R. F. Wuerker, R. E. Brooks, J. Appl. Phys. 37, 642 (1966).
[CrossRef]

Appl. Opt. (2)

J. Appl. Phys. (1)

L. O. Heflinger, R. F. Wuerker, R. E. Brooks, J. Appl. Phys. 37, 642 (1966).
[CrossRef]

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Figures (3)

Fig. 1
Fig. 1

This shows the active layer with a portion from y1 to y2 expanded by the action of the energy in the image by an amount δx.

Fig. 2
Fig. 2

This shows the entire instrument. The dotted line indicates the general direction of arrival of the radiation forming the thermal image. The laser light is shown divided by the beam splitter into two parts, a reference beam R which falls on the photographic film F after being reflected by the mirror M, and the measuring beam Q scattered by the active layer, also onto the photographic film; these two beams form the hologram.

Fig. 3
Fig. 3

Interference fringes representing the image of a hot soldering gun for thermal exposures varying from 5 sec to 15 sec, increasing top to bottom.

Equations (12)

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δ x = γ x = 0 Δ x [ T ( x , t ) T o ] d x ,
A x = 0 Δ x T t c p ρ d x = A 0 α ( λ ) H λ d λ A i q i ,
T ¯ T o = τ c p ρ Δ x 0 α ( λ ) H λ d λ i q i τ ,
δ x = γ τ c p ρ 0 α ( λ ) H λ d λ i q i τ ,
A u = ( s / r ) [ A o exp i ( ω t k r ) 2 i k x ( y , z ) ] ,
A s = ( s / r ) [ A o exp i ( ω t k r ) 2 i k x ( y , z ) 2 i k δ x ( y , z ) ] .
M = I o cos 2 [ k δ x ( y , z ) ] ,
0 α ( λ ) H ( λ ) d λ = c p ρ δ x γ τ .
d H = ( c p ρ δ x / 0.8 γ τ ) cal cm 2 sec 1 .
0 W ( λ ) d λ = σ T ,
d T = d W / ( 5.4 × 10 12 T 3 ) .
d T = ( 0.15 × 10 4 π d H ) / M 2 Ω .

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