| 摘要 |
A battery-operated device and method for determining the skin type of a living subject is disclosed in which an oil sample carried by a probe is subjected to the impingement of an essentially monochromatic light source of predetermined wavelength. The amount of light passing through the oil sample is detected and an output current proportional thereto is produced. This output current is amplified and drives a meter which displays the skin type of the subject. Calibration means and a method for calibrating the meter utilizing an oil-free probe are disclosed, as well as a means for adjusting the bandwidth of the output of the amplifier to coincide with the meter.
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