Abstract

Diazotype materials are sensitive to light in the blue and ultraviolet region. Their photosensitivities are many orders of magnitude lower than silver halide materials. For these reasons, diazotype materials are used mainly as duplicating materials, not for source recordings. In this paper, two methods for improving the photosensitivity of diazotype materials are described. In one method, a small amount of scattering centers are dispersed in the polymer binder of the film to increase the efficiency of the absorbed actinic light in the photodecomposition of the diazonium compound. In another method, the azo dye and vesicular processes are combined in the same film to create a high-density recorded image. The applications of these improved diazotype films to the laser imaging systems and digital data storage are discussed.

© 1983 Optical Society of America

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References

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  1. R. G. Zech, L. M. Ralston, M. W. Shareck, Real Time Holographic Recording Materials, final report RADC-TR-74-287 (1974).
  2. J. Kosar, Light Sensitive Systems (Wiley, New York, 1965), pp. 249–282.
  3. A. D. Berg, R. J. Cormier, J. S. Courtney-Pratt, J. Soc. Motion Pict. Eng. 83, 588 (1974).
  4. A. Baril, E. Klein, U.S. Pat.2,976,145 (1961).
  5. Ref. 2, pp. 265–269.
  6. O. J. Cope, Photo. Sci. Eng. 26, 190 (1982).
  7. S. J. Lee, Circuit Manuf.71 (Feb.1982).
  8. D. G. Howe, H. T. Thomas, J. J. Wrobel, Photogr. Sci. Eng. 23, 370 (1979).
  9. D. C. Kowalski, D. J. Curry, L. T. Klinger, G. Knight, Proc. Soc. Photo-Opt. Instrum. Eng. 329, 8 (1982).

1982

O. J. Cope, Photo. Sci. Eng. 26, 190 (1982).

S. J. Lee, Circuit Manuf.71 (Feb.1982).

D. C. Kowalski, D. J. Curry, L. T. Klinger, G. Knight, Proc. Soc. Photo-Opt. Instrum. Eng. 329, 8 (1982).

1979

D. G. Howe, H. T. Thomas, J. J. Wrobel, Photogr. Sci. Eng. 23, 370 (1979).

1974

A. D. Berg, R. J. Cormier, J. S. Courtney-Pratt, J. Soc. Motion Pict. Eng. 83, 588 (1974).

Baril, A.

A. Baril, E. Klein, U.S. Pat.2,976,145 (1961).

Berg, A. D.

A. D. Berg, R. J. Cormier, J. S. Courtney-Pratt, J. Soc. Motion Pict. Eng. 83, 588 (1974).

Cope, O. J.

O. J. Cope, Photo. Sci. Eng. 26, 190 (1982).

Cormier, R. J.

A. D. Berg, R. J. Cormier, J. S. Courtney-Pratt, J. Soc. Motion Pict. Eng. 83, 588 (1974).

Courtney-Pratt, J. S.

A. D. Berg, R. J. Cormier, J. S. Courtney-Pratt, J. Soc. Motion Pict. Eng. 83, 588 (1974).

Curry, D. J.

D. C. Kowalski, D. J. Curry, L. T. Klinger, G. Knight, Proc. Soc. Photo-Opt. Instrum. Eng. 329, 8 (1982).

Howe, D. G.

D. G. Howe, H. T. Thomas, J. J. Wrobel, Photogr. Sci. Eng. 23, 370 (1979).

Klein, E.

A. Baril, E. Klein, U.S. Pat.2,976,145 (1961).

Klinger, L. T.

D. C. Kowalski, D. J. Curry, L. T. Klinger, G. Knight, Proc. Soc. Photo-Opt. Instrum. Eng. 329, 8 (1982).

Knight, G.

D. C. Kowalski, D. J. Curry, L. T. Klinger, G. Knight, Proc. Soc. Photo-Opt. Instrum. Eng. 329, 8 (1982).

Kosar, J.

J. Kosar, Light Sensitive Systems (Wiley, New York, 1965), pp. 249–282.

Kowalski, D. C.

D. C. Kowalski, D. J. Curry, L. T. Klinger, G. Knight, Proc. Soc. Photo-Opt. Instrum. Eng. 329, 8 (1982).

Lee, S. J.

S. J. Lee, Circuit Manuf.71 (Feb.1982).

Ralston, L. M.

R. G. Zech, L. M. Ralston, M. W. Shareck, Real Time Holographic Recording Materials, final report RADC-TR-74-287 (1974).

Shareck, M. W.

R. G. Zech, L. M. Ralston, M. W. Shareck, Real Time Holographic Recording Materials, final report RADC-TR-74-287 (1974).

Thomas, H. T.

D. G. Howe, H. T. Thomas, J. J. Wrobel, Photogr. Sci. Eng. 23, 370 (1979).

Wrobel, J. J.

D. G. Howe, H. T. Thomas, J. J. Wrobel, Photogr. Sci. Eng. 23, 370 (1979).

Zech, R. G.

R. G. Zech, L. M. Ralston, M. W. Shareck, Real Time Holographic Recording Materials, final report RADC-TR-74-287 (1974).

Circuit Manuf.

S. J. Lee, Circuit Manuf.71 (Feb.1982).

J. Soc. Motion Pict. Eng.

A. D. Berg, R. J. Cormier, J. S. Courtney-Pratt, J. Soc. Motion Pict. Eng. 83, 588 (1974).

Photo. Sci. Eng.

O. J. Cope, Photo. Sci. Eng. 26, 190 (1982).

Photogr. Sci. Eng.

D. G. Howe, H. T. Thomas, J. J. Wrobel, Photogr. Sci. Eng. 23, 370 (1979).

Proc. Soc. Photo-Opt. Instrum. Eng.

D. C. Kowalski, D. J. Curry, L. T. Klinger, G. Knight, Proc. Soc. Photo-Opt. Instrum. Eng. 329, 8 (1982).

Other

A. Baril, E. Klein, U.S. Pat.2,976,145 (1961).

Ref. 2, pp. 265–269.

R. G. Zech, L. M. Ralston, M. W. Shareck, Real Time Holographic Recording Materials, final report RADC-TR-74-287 (1974).

J. Kosar, Light Sensitive Systems (Wiley, New York, 1965), pp. 249–282.

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Figures (6)

Fig. 1
Fig. 1

Density vs exposure curve of a diazo microfilm. The peak absorption of the diazonium compound in this film is at 405 nm.

Fig. 2
Fig. 2

Density vs exposure curve of a diazo film based on the compound 1-diazo-3-methoxy-4-pyrrolidino benzene, chlorozincate, with peak absorption at 420 nm. The dotted line curves show the improvements after the physical sensitization of the film.

Fig. 3
Fig. 3

Density vs exposure curve of a film based on the compound 7-dimethylamino-3-oxo-3,4-dihydro-2H-benzo(b)thiazine-6-dia-zonium tetrafluoroborate.

Fig. 4
Fig. 4

Physical sensitization of the diazo film, with the scatterers created by water treatment of the film, (a) untreated diazo film, (b) diazo film with scatterers.

Fig. 5
Fig. 5

Density vs exposure curve of the vesicular-diazo film based on the compound 2-diazo-l-napthol-5-sulfonic acid.

Fig. 6
Fig. 6

Projection density vs exposure curve of a vesicular based on the same compound as used in Fig. 2.

Equations (2)

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diazonium compound light decomposed product + nitrogen ,
diazonium compound + decompositon product Ammonia vapor azo dye .

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