Abstract: A correlated color temperature measuring device for measuring the color temperature of light includes a sensor which individually senses plural light components of light incident thereon and for providing plural corresponding digital color component signals representative thereof, a memory which stores correction data for correcting the plural digital color temperature component signals, and a processor which receives the plural digital color component signals from the sensor. The processor accesses the correction data in the memory, corrects the plural color component signals from the sensor based on the correction data and derives a digital signal representative of the color temperature of the incident light. The derived digital signal may be displayed on a digital display or may be outputted on a digital I/O interface in response to a request for digital color temperature information.

US.Class: 356402 356407 356419 315151

IPC: G01J00346 H05B03702

US Patents Cited: 3315029 4335943 4726676 4764670 4773761 4876166 4894683 4922089 4979803 5004349 5008739 5021875 5037201 5048955 5053299 5087808 5087937 5099313 5137364 5172146 5241374