{"id":10456,"date":"2022-09-19T05:59:57","date_gmt":"2022-09-19T05:59:57","guid":{"rendered":"https:\/\/www.szlaser.com\/?page_id=10456"},"modified":"2022-09-19T06:30:47","modified_gmt":"2022-09-19T06:30:47","slug":"optical-defects-2","status":"publish","type":"page","link":"https:\/\/www.szlaser.com\/index.php\/wiki\/optical-defects-2\/","title":{"rendered":"A few thoughts about optical defects"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1331.2px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-title title fusion-title-1 fusion-sep-none fusion-title-text fusion-title-size-one\"><h1 class=\"fusion-title-heading title-heading-left fusion-responsive-typography-calculated\" style=\"margin:0;--fontSize:32;line-height:1.3;\"><h1>A few thoughts about optical defects<\/h1><\/h1><\/div><div class=\"fusion-text fusion-text-1\"><p>The definition of the maximum permissible material, surface, and coating defects (imperfections) in the drawing or specifications is established by the designer and based on experience and knowledge. Visible defects, although they impact the perfection of the component, should be defined like any other parameter. Fulfilling the imperfection requirements is a very important issue for all people concerned:<\/p>\n<ul>\n<li>The designer is concerned that an exceptional defect might affect the functionality of the component or the assembly,<\/li>\n<li>The producer wants to perform their process and verify conformity to\u00a0the requirements,<\/li>\n<li>The customer wants a product that conforms to the requirements, and<\/li>\n<li>The inspector is responsible for determining conformity.<\/li>\n<\/ul>\n<p>The existing standards offer guidance for how to the use of comparison standards (gauges) to evaluate the conformity of an existing defect to the standard and to the requirements. However, when evaluating by comparison, there may be large deviations in results from different inspectors (see ASC OP1 ASC OP\/TF 2 \u201cPerformance-Based Optical Imperfections Task Force Draft Standard Meeting,\u201d August 26, 2007). In order to minimizing conflicts, those differences should be factored into the inspector\u2019s and designer\u2019s\u00a0decisions.<br \/>\nWhen certain deviations occur, the following values are taken into\u00a0account: the size of the deviation (big or small), its place on the item\u2019s surface (on the center or on its side), the location of the item (interior or exterior), the wavelength of the item\u2019s operation (visible or infrared), and sometimes even the contract requirements.<br \/>\nSome disadvantages of the milspecs and the ISO standards necessitate\u00a0using common sense in decision making. They do not state when a dig\u00a0(according to the milspecs) or localized imperfection (ISO 10110-7) become a scratch, or what to do if the width of the scratch along its length is not equal or continuous. ISO 10110-7 refers to long scratches, but what about short ones?<br \/>\nThis text recommends declaring (in the relevant organizational procedure) that a surface defect with a length that is up to 10 times larger than its width should be considered as a dig; when a surface defect\u2019s length is more than 10 times its width, then the defect should be considered as a scratch. For example, a defect 0.9 mm long and 0.1 mm wide will be considered as a dig, but a defect 0.11 mm long and 0.08 mm wide will be considered as a scratch.<\/p>\n<p>*REMEMBER THAT IN MOST CASES THE OBSERVED DIG DIAMETER IS LARGER THAN THE SCRATCH WIDTH!<\/p>\n<\/div><div class=\"fusion-text fusion-text-2\"><p>Another consideration that should be taken into account is any defect on a sample (test) disk or coated item that passed through environmental tests. The nonconformity of a surface defect should always be treated according to organizational procedures, and a corrective action should be taken to eliminate of any future nonconformity. The following scenarios are real examples of common-sense issues in decision making:<\/p>\n<p>1. Different widths along the scratch (Fig. below). If we take the widest area of the scratch along with its length and the scratch is within the spec, then it should be accepted as conforming to the requirements. However, if the widest area of the scratch is larger than the maximum permissible width, the wide area should be treated as a dig and the remainder as a scratch.<\/p>\n<p><img decoding=\"async\" class=\"lazyload aligncenter wp-image-10458 size-fusion-800\" src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Different-widths-along-the-scratch-800x326.png\" data-orig-src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Different-widths-along-the-scratch-800x326.png\" alt=\"\" width=\"800\" height=\"326\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27800%27%20height%3D%27326%27%20viewBox%3D%270%200%20800%20326%27%3E%3Crect%20width%3D%27800%27%20height%3D%27326%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Different-widths-along-the-scratch-200x81.png 200w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Different-widths-along-the-scratch-300x122.png 300w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Different-widths-along-the-scratch-400x163.png 400w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Different-widths-along-the-scratch-600x244.png 600w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Different-widths-along-the-scratch-669x272.png 669w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Different-widths-along-the-scratch-768x313.png 768w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Different-widths-along-the-scratch-800x326.png 800w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Different-widths-along-the-scratch-1024x417.png 1024w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Different-widths-along-the-scratch.png 1125w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>2. A broken scratch.<br \/>\nThe decision if it is one long scratch or several short scratches should be made by the inspector. The better choice is the one that gives the lowest result.<\/p>\n<p><img decoding=\"async\" class=\"lazyload aligncenter wp-image-10459 size-fusion-800\" src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-broken-scratch-800x259.png\" data-orig-src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-broken-scratch-800x259.png\" alt=\"\" width=\"800\" height=\"259\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27800%27%20height%3D%27259%27%20viewBox%3D%270%200%20800%20259%27%3E%3Crect%20width%3D%27800%27%20height%3D%27259%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-broken-scratch-200x65.png 200w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-broken-scratch-300x97.png 300w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-broken-scratch-400x129.png 400w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-broken-scratch-600x194.png 600w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-broken-scratch-768x249.png 768w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-broken-scratch-800x259.png 800w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-broken-scratch.png 834w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>3. A scratch with a dig at the edge.<br \/>\nA scratch is a scratch and a dig is a dig, so treat and evaluate them separately!<\/p>\n<p><img decoding=\"async\" class=\"lazyload aligncenter wp-image-10460 size-fusion-800\" src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-scratch-with-a-dig-at-the-edge-800x315.png\" data-orig-src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-scratch-with-a-dig-at-the-edge-800x315.png\" alt=\"\" width=\"800\" height=\"315\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27800%27%20height%3D%27315%27%20viewBox%3D%270%200%20800%20315%27%3E%3Crect%20width%3D%27800%27%20height%3D%27315%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-scratch-with-a-dig-at-the-edge-200x79.png 200w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-scratch-with-a-dig-at-the-edge-300x118.png 300w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-scratch-with-a-dig-at-the-edge-400x158.png 400w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-scratch-with-a-dig-at-the-edge-600x236.png 600w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-scratch-with-a-dig-at-the-edge-768x302.png 768w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-scratch-with-a-dig-at-the-edge-800x315.png 800w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/A-scratch-with-a-dig-at-the-edge.png 833w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>4. Combination of digs and scratches (see below).<br \/>\nThis case is similar to the case shown in above and should be treated the same, but if the diameter of the digs is smaller than the maximum permitted width, the collection can be treated as a scratch.<\/p>\n<p><img decoding=\"async\" class=\"lazyload aligncenter size-fusion-800 wp-image-10461\" src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Combination-of-digs-and-scratches-800x355.png\" data-orig-src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Combination-of-digs-and-scratches-800x355.png\" alt=\"\" width=\"800\" height=\"355\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27800%27%20height%3D%27355%27%20viewBox%3D%270%200%20800%20355%27%3E%3Crect%20width%3D%27800%27%20height%3D%27355%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Combination-of-digs-and-scratches-200x89.png 200w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Combination-of-digs-and-scratches-300x133.png 300w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Combination-of-digs-and-scratches-400x177.png 400w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Combination-of-digs-and-scratches-600x266.png 600w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Combination-of-digs-and-scratches-768x341.png 768w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Combination-of-digs-and-scratches-800x355.png 800w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Combination-of-digs-and-scratches.png 834w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>5. Special case of a dig structure.<br \/>\nAccording to the milspecs, digs are defined by their diameter or by the average of the average of the maximum length and the maximum width.<\/p>\n<p><img decoding=\"async\" class=\"lazyload aligncenter size-fusion-800 wp-image-10462\" src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Special-case-of-a-dig-structure-800x408.png\" data-orig-src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Special-case-of-a-dig-structure-800x408.png\" alt=\"\" width=\"800\" height=\"408\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27800%27%20height%3D%27408%27%20viewBox%3D%270%200%20800%20408%27%3E%3Crect%20width%3D%27800%27%20height%3D%27408%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Special-case-of-a-dig-structure-200x102.png 200w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Special-case-of-a-dig-structure-300x153.png 300w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Special-case-of-a-dig-structure-400x204.png 400w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Special-case-of-a-dig-structure-600x306.png 600w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Special-case-of-a-dig-structure-768x392.png 768w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Special-case-of-a-dig-structure-800x408.png 800w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/Special-case-of-a-dig-structure.png 833w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><img decoding=\"async\" class=\"lazyload aligncenter size-fusion-800 wp-image-10463\" src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/surface-of-dig-no.-2-800x56.png\" data-orig-src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/surface-of-dig-no.-2-800x56.png\" alt=\"\" width=\"800\" height=\"56\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27800%27%20height%3D%2756%27%20viewBox%3D%270%200%20800%2056%27%3E%3Crect%20width%3D%27800%27%20height%3D%2756%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/surface-of-dig-no.-2-200x14.png 200w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/surface-of-dig-no.-2-300x21.png 300w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/surface-of-dig-no.-2-400x28.png 400w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/surface-of-dig-no.-2-600x42.png 600w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/surface-of-dig-no.-2-768x53.png 768w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/surface-of-dig-no.-2-800x56.png 800w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/surface-of-dig-no.-2.png 806w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>The surface of dig no. 2 is almost twice that of dig no. 1, so, for\u00a0example, if the stated requirement for scratch-dig numbers is 80-50 (or F-F) and x = 0.7 mm and y = 0.5 mm, then the actual diameter is\u00a0(0.7 + 0.5)\/2 = 0.6 mm, which means that there is a deviation in both\u00a0digs (dig no. 50 means a diameter of 0.5 mm).<br \/>\nIf the values of both digs are reversed into equivalent surfaces, then<\/p>\n<p><img decoding=\"async\" class=\"lazyload aligncenter size-full wp-image-10464\" src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/caculation-of-digs.png\" data-orig-src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/caculation-of-digs.png\" alt=\"\" width=\"504\" height=\"72\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27504%27%20height%3D%2772%27%20viewBox%3D%270%200%20504%2072%27%3E%3Crect%20width%3D%27504%27%20height%3D%2772%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/caculation-of-digs-200x29.png 200w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/caculation-of-digs-300x43.png 300w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/caculation-of-digs-400x57.png 400w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/caculation-of-digs.png 504w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 504px) 100vw, 504px\" \/><\/p>\n<p>The equation for a circle surface is , so the diameter is<\/p>\n<p><img decoding=\"async\" class=\"lazyload aligncenter size-full wp-image-10465\" src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/equation-of-diameter-of-a-circle-surface.png\" data-orig-src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/equation-of-diameter-of-a-circle-surface.png\" alt=\"\" width=\"214\" height=\"96\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27214%27%20height%3D%2796%27%20viewBox%3D%270%200%20214%2096%27%3E%3Crect%20width%3D%27214%27%20height%3D%2796%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/equation-of-diameter-of-a-circle-surface-200x90.png 200w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/equation-of-diameter-of-a-circle-surface.png 214w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 214px) 100vw, 214px\" \/><\/p>\n<p>so the diameter is<\/p>\n<p><img decoding=\"async\" class=\"lazyload aligncenter size-full wp-image-10466\" src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/the-diameter.png\" data-orig-src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/the-diameter.png\" alt=\"\" width=\"432\" height=\"86\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27432%27%20height%3D%2786%27%20viewBox%3D%270%200%20432%2086%27%3E%3Crect%20width%3D%27432%27%20height%3D%2786%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/the-diameter-200x40.png 200w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/the-diameter-300x60.png 300w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/the-diameter-400x80.png 400w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/the-diameter.png 432w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 432px) 100vw, 432px\" \/><\/p>\n<p>therefore, the equivalent diameter for dig no. 2 will be<\/p>\n<p><img decoding=\"async\" class=\"lazyload aligncenter size-full wp-image-10467\" src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/equivalent-diameter-for-dig-no.-2.png\" data-orig-src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/equivalent-diameter-for-dig-no.-2.png\" alt=\"\" width=\"646\" height=\"56\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27646%27%20height%3D%2756%27%20viewBox%3D%270%200%20646%2056%27%3E%3Crect%20width%3D%27646%27%20height%3D%2756%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/equivalent-diameter-for-dig-no.-2-200x17.png 200w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/equivalent-diameter-for-dig-no.-2-300x26.png 300w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/equivalent-diameter-for-dig-no.-2-400x35.png 400w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/equivalent-diameter-for-dig-no.-2-600x52.png 600w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/equivalent-diameter-for-dig-no.-2.png 646w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 646px) 100vw, 646px\" \/><\/p>\n<p>but the surface of dig no. 1 is almost half that of dig no. 2 (0.35\/2 = 0.175 mm\u00b2), so the diameter of dig no. 1 will be<\/p>\n<p><img decoding=\"async\" class=\"lazyload aligncenter size-full wp-image-10468\" src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/the-diameter-of-dig-no.-1.png\" data-orig-src=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/the-diameter-of-dig-no.-1.png\" alt=\"\" width=\"794\" height=\"64\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27794%27%20height%3D%2764%27%20viewBox%3D%270%200%20794%2064%27%3E%3Crect%20width%3D%27794%27%20height%3D%2764%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/the-diameter-of-dig-no.-1-200x16.png 200w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/the-diameter-of-dig-no.-1-300x24.png 300w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/the-diameter-of-dig-no.-1-400x32.png 400w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/the-diameter-of-dig-no.-1-600x48.png 600w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/the-diameter-of-dig-no.-1-768x62.png 768w, https:\/\/www.szlaser.com\/wp-content\/uploads\/2022\/09\/the-diameter-of-dig-no.-1.png 794w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 794px) 100vw, 794px\" \/><\/p>\n<p>According to the MIL requirements of this example, 0.6 mm supports\u00a0rejecting the element because it does not conform to the requirement of 0.5 mm. However, further consideration and use of common sense would suggest approving and accepting the deviation (only according to stated organizational procedure). ISO 10110-7 refers to the square root of the localized surface imperfection area, and for cases such as the current example, the result is more precise and more convenient.<\/p>\n<\/div><div style=\"text-align:right;\"><a class=\"fusion-button button-flat fusion-button-default-size button-default fusion-button-default button-1 fusion-button-default-span fusion-button-default-type\" target=\"_self\" href=\"https:\/\/www.szlaser.com\/index.php\/wiki\/clean-and-handle-optics\/\"><span class=\"fusion-button-text awb-button__text awb-button__text--default\">How to clean and handle optics &gt;<\/span><\/a><\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":7,"featured_media":0,"parent":8230,"menu_order":106,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-10456","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v18.7 (Yoast SEO v25.8) - 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