| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a density measurement device for a liquid developer capable of correctly measuring the density of particles with a simple constitution, and to provide an image forming apparatus. <P>SOLUTION: A transparent tube 40 is pressed by a first pressing member 50, and, in a state where the transparent tube 40 is deformed, density measurement is performed äSee (b)}. In this state, the cross-section of the transparent tube 40 has oval shape, and is simultaneously sandwiched between the first pressing face 51 and the second pressing face 61 each composed of a flat face, thus the parts in contact with the first and second pressing faces 51, 61 in the transparent tube 40 are deformed, so as to be planar shape. Infrared light emitted from a light emitting element 52 passes through the part deformed into the planar shape in the transparent tube 40, thus is not refracted. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
