Dual standard gloss sensor
AssigneeHoneywell-Measurex Corporation
InventorsJohn G. Preston, Edward Belotserkovsky
Life of this patent
Estimating the term…
Abstract
A single gloss sensor which can perform both DIN gloss measurement and DIN high gloss measurement, using the same hardware, and with minimal delay between the two measurements. The gloss sensor functions by directing light beams from a source to two different positions, either concurrently, or sequentially, between a position which measures gloss (75.degree) and a position which measures high gloss (45.degree). The gloss sensor also provides a reference light beam for correction of errors caused by the window glass, such as by dirt buildup.
Claims11
A dual standard gloss sensor for optically measuring the gloss of a sample surface comprising:
- a light beam source;
- first means for directing an incident light beam from the light beam source to the sample surface at a first angle;
- second means for directing an incident light beam from the light beam source to the sample surface at a second angle;
- first reflectance sensing means positioned to measure the intensity of the light beam reflected from the sample surface at said first angle;
- and
- second reflectance sensing means positioned to measure the intensity of the light beam reflected from the sample surface at said second angle.
A dual standard gloss sensor for optically measuring the gloss of a sample surface comprising:
- a first source of light;
- a first mirror for causing an incident beam of light from said source to strike the measuring surface at a first angle when in a first position, and to strike the measuring surface at a second angle when in a second position;
- and
- a second mirror for receiving a beam reflected from the sample surface at the first angle when in a first position, and for receiving a beam reflected from the sample surface at the second angle when in a second position.
A dual standard gloss sensor for optically measuring the gloss of a sample surface comprising:
- a first source of light;
- a first optical fiber for transmitting a light beam having a first modulation frequency from said source of light;
- a first collimator for receiving the light beam to form a collimated light beam which strikes the paper sample at a first angle;
- a second optical fiber for transmitting a light beam having a second modulation frequency from said source of light;
- a second collimator for receiving the light beam to form a collimated light beam which strikes the paper sample at a second angle;
- a first collimator-detector for receiving said first light beam and creating a first gloss signal;
- a second collimator-detector for receiving said second light beam and creating a second gloss signal;
- third an fourth optical fibers for receiving a beam of light from said source of light and passing the beams directly to a third and fourth collimator-detector, the third beam of light being modulated at the first frequency, and the fourth beams of light being modulated by the second frequency;
- first signal correction means for correcting the first gloss signal with first reference signal to create a first corrected gloss signal;
- and
- second signal correction means for correcting the second gloss signal with the second reference signal to create a second corrected gloss signal.
A dual standard gloss sensor for optically measuring the gloss of a sample surface having a first and second sensor windows, comprising:
- a first source of light;
- a first optical fiber for transmitting a light beam having a first modulation frequency from said source of light;
- a first collimator for receiving the light beam to form a collimated light beam which strikes the paper sample at a first angle;
- a second optical fiber for transmitting a light beam having a second modulation frequency from said source of light;
- a second collimator for receiving the light beam to form a collimated light beam which strikes the paper sample at a second angle;
- a first collimator-detector for receiving said first light beam and creating a first gloss signal;
- a second collimator-detector for receiving said second light beam and creating a second gloss signal;
- third an fourth optical fibers for receiving a beam of light from said source of light and passing the beams to a First and second GRIN lenses, the third beam of light being modulated at the third frequency, and the fourth beams of light being modulated by the fourth frequency;
- first and second reference detectors for receiving said third and fourth beams of light after said light passes through the first and second glass windows;
- first Signal correction means for correcting the first gloss signal with first reference signal to create a first corrected gloss signal;
- and
- second signal correction means for correcting the second gloss signal with the second reference signal to create a second corrected gloss signal.
Dependencies are inferred from the claim text.