Advertisement

Automatic read-out device for ultraviolet-radiation polymer-film dosimeters

  • M. G. Pepper
  • B. L. Diffey
Article

Abstract

An automatic device for measuring the optical absorbance of polymer film used as an ultravioletradiation dosimeter is described. The automated mechanics are based on a commercial slide projector. The ultraviolet radiation is generated by a tungsten quartz-halogen bulb. The optical absorbance is determined by analogue logarithmic circuitry and the resultant value displayed on a digital panel meter. A digital printer or paper-tape punch may be used for hard-copy output. An uncertainty in measurement of 1% is obtained. The device temperature stability is such that this uncertainty can be maintained for analogue circuit temperatures of 20–40°C.

Keywords

Automatic read-out device Logarithmic Polymer film Ultraviolet radiation dosimetry 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Challoner, A. V. J., Corless, D., Davis, A., Deane, G. H. W., Diffey, B. L., Gupta, S. P. andMagnus, I. A. (1976) Personnel monitoring of exposure to ultraviolet radiation.Clin. Exp. Dermatol.,1, 175–179.CrossRefGoogle Scholar
  2. Corbett, M. F., Davis, A. andMagnus, I. A. (1978) Personnel radiation dosimetry in drug photosensitivity: field study of patients on phenothiazine therapy.Br. J. Dermatol.,98, 39–46.Google Scholar
  3. Corless, D., Gupta, S. P., Switala, S., Barragry, J. M., Boucher, B. J., Cohen, R. D. andDiffey, B. L. (1978) Response of plasma-25-hydroxyvitamin D to ultraviolet irradiation in long-stay geriatric patients.Lancet,ii, 649–651.CrossRefGoogle Scholar
  4. Davis, A., Deane, G. H. W. andDiffey, B. L. (1976) Possible dosimeter for ultraviolet radiation.Nature,261, 169–170.CrossRefGoogle Scholar
  5. Diffey, B. L., Kerwin, M. andDavis, A. (1977) The anatomical distribution of sunlight.Br. J. Dermatol.,97, 407–410.Google Scholar
  6. Diffey, B. L. andChalloner, A. V. J. (1978) Absolute radiation dosimetry in photochemotherapy.Phys. Med. & Biol.,23, 1124–1129.CrossRefGoogle Scholar
  7. Diffey, B. L., Tate, T. J. andDavis, A. (1979) Solar dosimetry of the face.,24, 931–939.CrossRefGoogle Scholar
  8. Leach, J. F., McLeod, V. E., Pingstone, A. R., Davis, A. andDeane, G. H. W. (1978) Measurement of the ultraviolet doses received by office workers.Clin. Exp. Dermatol.,3, 77–79.CrossRefGoogle Scholar
  9. Wong, Y. J. andOtt, E. W. (1976)Function circuits. McGraw-Hill, Ch. 2.Google Scholar

Copyright information

© IFMBE 1980

Authors and Affiliations

  • M. G. Pepper
    • 1
    • 2
  • B. L. Diffey
    • 1
    • 2
  1. 1.Electronics LaboratoriesUniversity of KentCanterburyEngland
  2. 2.Medical Physics Department, Nuffield WardDryburn Hospital Durham DH1 5TWEngland

Personalised recommendations