As experts in the design and manufacture of thin film optical filters, Iridian employs rigorous quality assurance processes.\u00a0 Among these is our comprehensive visual inspection process, which includes the following steps:<\/p>\n
We inspect the clear aperture (typically\u00a0central region\u00a0of\u00a0a filter) through the light beam is transmitted or reflected.<\/p>\n
After a coring or dicing process, we inspect for both chips in the\u00a0substrate\u00a0and in filter coating.\u00a0\u00a0If\u00a0a\u00a0chip of either type\u00a0extends into the clear aperture of the filter, then this\u00a0results in a filter failing visual inspection.<\/p>\n
Sleeks are scratches on the\u00a0substrate underneath the coating. A sleek appears as a bright white line when observed under bright field\u00a0illumination. Sleeks can be long (across the entire filter) or short and they can be straight or have various orientations.<\/p>\n
A filter containing a sleek or scratch results in a visual inspection failure if, within the clear aperture area, the width is greater than a specified scratch<\/span><\/em> value.\u00a0 In the case of a filter with more than one sleek or scratch in the clear aperture area, the sum of all sleeks in the clear aperture area is used.<\/p>\n We also inspect for defects not found in other categories, such as pits or areas with insufficient coating.\u00a0 A filter with a defect in the clear aperture area fails visual inspection if its width is greater than a specified dig<\/em><\/span> value.\u00a0 In the case of a filter with more than one defect present in the clear aperture area, the sum of all\u00a0clear aperture area\u00a0defects must be less than the specified dig<\/em><\/span> value in order to pass visual inspection.<\/p>\n A protrusion is any excess material protruding from the side of the filter.\u00a0 Any visible protrusion results in the filter failing visual inspection.<\/p>\n","protected":false},"excerpt":{"rendered":" As experts in the design and manufacture of thin film optical filters, Iridian employs rigorous quality assurance processes…<\/p>\n","protected":false},"author":159,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"off","_et_pb_old_content":" As experts in the design and manufacture of thin film optical filters, Iridian employs rigorous quality assurance processes.\u00a0 Among these is our comprehensive visual inspection process, which includes the following steps:<\/p> We inspect the clear aperture (typically\u00a0central region\u00a0of\u00a0a filter) through the light beam is transmitted or reflected.<\/p> After a coring or dicing process, we inspect for both chips in the\u00a0substrate\u00a0and in filter coating.\u00a0\u00a0If\u00a0a\u00a0chip of either type\u00a0extends into the clear aperture of the filter, then this\u00a0results in a filter failing visual inspection.<\/p> Sleeks are scratches on the\u00a0substrate underneath the coating. A sleek appears as a bright white line when observed under bright field\u00a0illumination. Sleeks can be long (across the entire filter) or short and they can be straight or have various orientations.<\/p> A filter containing a sleek or scratch results in a visual inspection failure if, within the clear aperture area, the width is greater than a specified scratch<\/span><\/em> value.\u00a0 In the case of a filter with more than one sleek or scratch in the clear aperture area, the sum of all sleeks in the clear aperture area is used.<\/p> We also inspect for defects not found in other categories, such as pits or areas with insufficient coating.\u00a0 A filter with a defect in the clear aperture area fails visual inspection if its width is greater than a specified dig<\/em><\/span> value.\u00a0 In the case of a filter with more than one defect present in the clear aperture area, the sum of all\u00a0clear aperture area\u00a0defects must be less than the specified dig<\/em><\/span> value in order to pass visual inspection.<\/p> A protrusion is any excess material protruding from the side of the filter.\u00a0 Any visible protrusion results in the filter failing visual inspection.<\/p>","_et_gb_content_width":"","footnotes":""},"categories":[2205,2210],"tags":[],"class_list":["post-17666","post","type-post","status-publish","format-standard","hentry","category-learning_center","category-quality_assurance"],"acf":[],"yoast_head":"\nDefects<\/h2>\n
Protrusions<\/h2>\n
Critical Area<\/h2>
Edge\/Corner (Chips)<\/h2>
Sleeks, Scratches and Digs<\/h2>
Defects<\/h2>
Protrusions<\/h2>