{"id":3182,"date":"2026-08-19T06:40:46","date_gmt":"2026-08-19T11:40:46","guid":{"rendered":"https:\/\/jimlund.org\/blog\/?page_id=3182"},"modified":"2026-08-22T17:29:12","modified_gmt":"2026-08-22T22:29:12","slug":"glass-polishing","status":"publish","type":"page","link":"https:\/\/jimlund.org\/blog\/?page_id=3182","title":{"rendered":"Glass polishing"},"content":{"rendered":"\n

Mechanical polishing.<\/p>\n\n\n\n

Fluid jet polishing.<\/p>\n\n\n\n

Fluid jet polishing of optical surfaces<\/a><\/p>\n\n\n\n

Abrasive liquid jet as a flexible polishing tool<\/a><\/p>\n\n\n\n

Experimental study on surface generation in optical glass with fluid jet polishing process<\/a><\/p>\n\n\n\n

<\/p>\n\n\n\n

Chemical polishing: Heated bath of concentrated sulfuric acid (H\u2082SO\u2084) and hydrofluoric acid (HF).<\/p>\n\n\n\n

Flame polishing.<\/p>\n\n\n\n

Ion beam polishing.<\/p>\n\n\n\n

Magneto-rheological finishing (MRF).<\/p>\n\n\n\n

Elastic emission machining (EEM).<\/p>\n\n\n\n

Ultrasonic polishing. Ultrasonic + cerium oxide. 20% to several times faster.<\/p>\n\n\n\n

Laser polishing.<\/p>\n\n\n\n

“It was determined that surface roughness on the 100-\u03bc<\/em>m size scale was responsible for a loss in transparency. Surface roughness on the submicron size scale did not affect the transparency.”<\/p>\n\n\n\n

Surface Finish Conversion Chart: Ra, RMS, Rz, and Typical Processes<\/strong>
<\/p>\n\n\n\n

Ra (\u00b5in)<\/th>Ra (\u00b5m)<\/th>RMS (\u00b5in)<\/th>Rz (\u00b5m)<\/th>Grit #<\/th>Typical Process \/ Application<\/th><\/tr><\/thead>
250<\/td>6.30<\/td>275<\/td>25<\/td>60<\/td>Standard machining, #1 finish (HRAP)<\/td><\/tr>
71<\/td>1.80<\/td>78<\/td>7<\/td>80<\/td>\u2014<\/td><\/tr>
52<\/td>1.32<\/td>58<\/td>5<\/td>120<\/td>\u2014<\/td><\/tr>
42<\/td>1.06<\/td>46<\/td>4<\/td>150<\/td>\u2014<\/td><\/tr>
19 \u2013 32<\/td>0.48 \u2013 0.80<\/td>21 \u2013 33<\/td>1.9 \u2013 3.2<\/td>180 \u2013 220<\/td>#4 brushed, dairy\/sanitary range<\/td><\/tr>
15<\/td>0.38<\/td>17<\/td>1.5<\/td>240<\/td>ASME BPE SF4 (bio-pharma EP)<\/td><\/tr>
12<\/td>0.30<\/td>14<\/td>1.2<\/td>320<\/td>\u2014<\/td><\/tr>
9<\/td>0.23<\/td>10<\/td>0.9<\/td>400<\/td>Fine lap, mirror prep<\/td><\/tr>
4<\/td>0.10<\/td>4.4<\/td>0.4<\/td>500<\/td>\u2014<\/td><\/tr>
2<\/td>0.05<\/td>2.2<\/td>0.2<\/td>\u2014<\/td>Optical \/ mirror finish<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"

Mechanical polishing. Fluid jet polishing. Fluid jet polishing of optical surfaces Abrasive liquid jet as a flexible polishing tool Experimental study on surface generation in optical glass with fluid jet polishing process Chemical polishing: Heated bath of concentrated sulfuric acid (H\u2082SO\u2084) and hydrofluoric acid (HF). Flame polishing. Ion beam polishing. Magneto-rheological finishing (MRF). Elastic emission […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3182","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/pages\/3182","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jimlund.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3182"}],"version-history":[{"count":2,"href":"https:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/pages\/3182\/revisions"}],"predecessor-version":[{"id":3190,"href":"https:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/pages\/3182\/revisions\/3190"}],"wp:attachment":[{"href":"https:\/\/jimlund.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3182"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}