METHOD AND SYSTEM FOR ALIGNING EJECTORS THAT EJECT CLEAR MATERIALS IN A PRINTER

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 sensorincludes 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 theejector head that ejects clear drops. 打印机配置有光学传感器，所述光学传感器使得能够检测在镜状表面上用透明滴形成的测试图案中的短线并识别其位置。光学传感器包括邻近光源定位的百叶窗以限制和准直由光源发射到测试图案的每个部分上的光量。光的限制便于处理由接收来自镜状衬底和测试图案的镜面光反射的多个光电器件生成的图像数据以识别短线的位置。将这些识别的位置与期望的位置进行比较以识别可以用于调节喷射器头对准和喷射透明滴的