Automatic read-out device for ultraviolet-radiation polymer-film dosimeters
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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.
KeywordsAutomatic read-out device Logarithmic Polymer film Ultraviolet radiation dosimetry
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