| 摘要 |
PURPOSE:To make it possible to accurately correct a measured density value in the entire region of a density measuring range, by using the correction coefficient and constant of a density area to which the measured density of a specimen belongs. CONSTITUTION:The white light from a light source 10 is condensed to the stage 12 placed on a specimen 13 by a condensing lens 11. Next, the spot light transmitted through the specimen 13 is condensed to a light receiver 15 by a condensing lens 14 and a turret 19 provided with one hole 20 and three standard plates 21-23 known in density at an equal interval is arranged between the lens 14 and the light receiver 15. Next, the light receiver 15 converts the incident light to an electric signal to sent the same to an amplifier 26 and the amplified signal is converted to a digital signal through an A/D converter 27 in timing synchronous to position signal from a position detector 25. This digital signal is converted to a density value by a logarithmic converter 28 while the density value is sent to an operation part 29 where the measured density of the specimen is corrected to be displayed on a display device 30. |
