Abstract:
A handheld device and system ins disclosed in which the device has a wide reading head with a narrow optical slot. The reader is used to read color patches on a target or the color output of a printer or other color reproducing device in which the colors to be measured are presented as a number of patches on a target. The light from the sensor is collimated and diffracted and focused onto a sensor for providing electrical signals indicative of the sensed patch. Repeated images of each test patch are taken and sent to the sensor. The output of the sensor is computed by on board electronics and an external computer to determine each color being measured. As indicated, light passes through a slot in the handheld device, is collimated and passed through a diffraction grating or prism so as to split the light into its spectral components and its position of its pixels with respect to the slot. The sensor is of the type found in a digital camera or similar means. Thus, the sensor provides signals which provide the spatial component in one direction, the spectral component in the other, and the intensity. Multiple images are taken of each colored patch. To calibrate the handheld device, the system calculates the spectral values and position of each pixel of a single-colored patch, converting these values into a grey scale and calculating the intensity and density of the light. This is then compared with pre-stored indicia to determine the accurate intensity level. A fully calibrated reader is then used to adjust the output of a color reproducing device, such as a color printer. It performs the same tasks of reading from the color target taken from the color reproducing device and matches the reflected output against stored values and calculates the provided signals to provide control signals to adjust the color reproducing device.
Abstract:
본명세서는보다정확한출력을포함할수 있는광대역색도계를제공하는방법에관한다양한실시예들을설명한다. 일실시예에서, 분광계또는분광기등의협대역장비는광대역색도계의보정에사용될수 있고, 따라서더 정확한출력이제공될수 있다. 일실시예에서, 광대역색도계및 협대역분광기로구성된광 테스트장비는보다정확하게보정된광대역색도계를제공하는데사용될수 있다. 예로서, 광대역색도계및 협대역분광기로구성된하이브리드시스템인스펙트럼카메라는광대역색도계및 협대역분광기에의한동시테스트에사용될수 있다. 통시테스트에의해광대역색도계의정확한보정이달성될수 있다. 본명세서는협대역다중채널분광계를갖는광대역세 채널색도계를특징화하는수학적모델을더 기술한다.