COMBINED REFRACTOMETER WITH KERATOMETER APPARATUS

Brand	Owner	Address	Description
AUTO REF-KERATOMETER	CANON KABUSHIKI KAISHA	30-2, Shimomaruko 3-chome Ohta-ku, Tokyo 146-8501 Japan	combined refractometer with keratometer apparatus;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

The present invention relates to ink output in ink jet printing systems. A refractometer is used to control the concentration of inks used in continuous ink jet printers. A concentration detector measures the total amount of light reflected from a surface. Changes in the ink cause a definite change in sensor output. As the refractive index is changed, shifting the critical angle for internal reflection, more or less light is reflected to the sensor. The index of refraction can be determined from the sensor once corrections are made to account for temperature dependencies of the sensor and light source and baseline measurement of reflected light amplitude. These dependencies are carried out in the refractometer.