Abstract: A method is disclosed. For example, the method includes printing an image on a substrate, applying an adhesive on select portions of the image, coupling the image to a wave guide such that the adhesive contacts a surface of the wave guide, and providing a light through the wave guide such that the light is emitted through the wave guide and the adhesive and the light is reflected by the select portions of the image back through the adhesive and the wave guide.

Abstract: A method is disclosed. For example, the method includes printing an image on a substrate, applying an adhesive on select portions of the image, coupling the image to a wave guide such that the adhesive contacts a surface of the wave guide, and providing a light through the wave guide such that the light is emitted through the wave guide and the adhesive and the light is reflected by the select portions of the image back through the adhesive and the wave guide.

Abstract: A printer is configured with an optical sensor that enables dashes in a test pattern formed with clear drops on a mirror-like surface to be detected and their positions identified. The optical sensor includes a louver positioned adjacent to a light source to limit and collimate an amount of light emitted by the light source onto each portion of the test pattern. The limiting of the light facilitates the processing of the image data generated by a plurality of photodevices that receive the specular light reflections from the mirror-like substrate and the test pattern to identify the positions of the dashes. These identified positions are compared to expected positions to identify misalignment distances that can be used to adjust ejector head alignment and timing of the firing signals to the ejector head that ejects clear drops.

Abstract: A printer is configured with an optical sensor that enables dashes in a test pattern formed with clear drops on a mirror-like surface to be detected and their positions identified. The optical sensor includes a louver positioned adjacent to a light source to limit and collimate an amount of light emitted by the light source onto each portion of the test pattern. The limiting of the light facilitates the processing of the image data generated by a plurality of photodevices that receive the specular light reflections from the mirror-like substrate and the test pattern to identify the positions of the dashes. These identified positions are compared to expected positions to identify misalignment distances that can be used to adjust ejector head alignment and timing of the firing signals to the ejector head that ejects clear drops.