| 摘要 |
PROBLEM TO BE SOLVED: To provide a color measurement device for ink of color printer capable of measuring, on-line and speedily, the color of a color patch part. SOLUTION: Light from a xenon light source 21 is cast on a part where a color patch 53 passes via an optical fiber 22 and a condensing lens 23. The reflection light is condensed with a tele-centric lens 14 and focused on a light reception surface of a transmission wavelength variable filter 11. This light is separated in spectrum with the transmission wavelength variable filter 11 and introduced to a linear sensor 13 via a fiber optical plate(FOP) or a collimator 12. The output of the linear sensor 13 is converted into analog signal by an analog signal generator 14 and sent to a signal processor 3. In the signal processor 3, spectral solid angle reflectance is obtained from the obtained spectral reflectance, and color or color difference is calculated based on the value and the equation for various color coordinate system stored in advance or the equation for color difference. |
