Abstract: Embodiments of the invention generally relate to color and appearance metric measurements and, in particular, developing instrumentation to enable self-consistent image appearance measurements within instruments of unitary construction.

Abstract: Embodiments of the invention generally relate to color and appearance metric measurements and, in particular, developing instrumentation to enable self-consistent image appearance measurements within instruments of unitary construction.

Abstract: Color measurement instruments and processes provide automated and accurate color measurements. Sensor to sample distance is automatically adjusted by the instrument over the course of measurement collection. Adaptive parameters may include turntable speed, illumination spectrum, laser gain setting, number of measurement samples, duration of sampling, sample color measurement threshold, and distance variation measurement threshold.

Abstract: Color measurement instruments and processes provide automated and accurate color measurements. Sensor to sample distance is automatically adjusted by the instrument over the course of measurement collection. Adaptive parameters may include turntable speed, illumination spectrum, laser gain setting, number of measurement samples, duration of sampling, sample color measurement threshold, and distance variation measurement threshold.

Abstract: The attenuator includes an externally threaded sleeve for receiving standard ferrules within its bore at opposite ends, an internally threaded adjuster for threaded engagement about the sleeve and a ferrule locking nut threadedly engageable about the adjuster for clamping a ferrule at one end of the sleeve between the adjuster and ferrule locking nut. By relatively threading the sleeve and adjuster, the ferrule may be displaced relative to the sleeve whereby the end face of the optical fiber carried thereby is adjustably spaced from the end face of an optical fiber carried by a ferrule fixed on the sleeve at the opposite end thereof.

Abstract: A small portable drawing-in machine is disclosed for suspension on the top of a loom reed and for movement along the lengths of the reed. A drive screw on the machine meshes with the reed dents to control the position of the machine on the reed, and a threading hook is projectable through the spaces between reed dents to draw warp yarns therethrough. A set of drive screws of different pitches may be replaceably mounted in the machine to give the machine a capability for use on reeds of different pitch.The threading hook is reciprocably mounted on a rotatable turntable that is coupled through suitable gearing to the drive for the drive screw so that a machine cycle includes a movement of the threading hook to carry a warp yarn through a space between reed dents, a rotary movement through 360.degree.

Abstract: The light reflectance of metallic flake finishes can be successfully separated into a flake component and a diffuse component. An empirical model accurately represents the statistical distribution of flake orientation in extreme cases and in areas of transition between the extreme cases. Colorimetric measurements at three angles of observation are both necessary and sufficient to characterize a flake finish to the precision required in normal quality control applications. Filter colorimetry or spectrophotometry can be used to obtain the data from which the model parameters are calculated. The model parameters provide objective qualitative data describing the optical and physical characteristics of flake finishes.

Abstract: Spectrophotometer apparatus and method is disclosed which utilizes a totally unobstructed test light flux channel in combination with a periodically occluded reference light flux channel. The outputs of the test and reference channels are mixed and presented to a common light analyzing device from which successive timed-multiplexed measurements can be used to provide spectrophotometric data automatically corrected for drift in critical parameter values associated with the common source and/or light analyzing device. For example, by subtracting light flux measurements obtained during occluded periods from those obtained when the reference channel is not occluded, a measurement can be derived for the light flux passing through the reference channel alone. This derived measurement can then be used to drift-correct measurements made on the light flux coming through the test channel alone when the reference channel is occluded. Comparison of successive light flux measurements made under similar conditions (i.e.

Abstract: A combined scanning spectrophotometer-digital data processing system including a microcomputer is described for making appearance measurements. The instrument is comprised by an optical sensing unit and a signal processing unit. The optical sensing unit utilizes a simulated D65 light source lamp together with an 8 inch diameter integrating light sphere for use primarily in the diffuse polychromatic illumination of reflectance test specimens but which also is used with transmittance test specimens. Light leaves the sphere through a transmittance port in which a transmittance test specimen may be disposed in the case of transmittance measurements. The light sphere further includes a reflectance port for making reflectance measurement of a test specimen placed at the reflectance port.

Abstract: A sensing head assembly for a multi-color printing press on-line densitometer movably mounted on support members that extend across the width of a printed web of paper that has printed thereon, in addition to the printed matter being monitored, a plurality of spaced-apart color bars that extend across the width of the paper at predetermined intervals along its length. During operation, the sensing head assembly is traversed back and forth across the width of the material in a manner such that a sensing head assembly views a selected color bar at different points along the width and length of the printed web of material. At least two high luminance lamps are mounted within the sensing head housing for projecting light through a window onto a specimen plane of the material being printed to thereby define an inspection zone for illuminating a single selected color bar at any point along the width and length of the printed material.