{"id":3729,"date":"2026-09-28T10:44:06","date_gmt":"2026-09-28T02:44:06","guid":{"rendered":"http:\/\/0"},"modified":"2026-09-22T17:58:13","modified_gmt":"2026-09-22T09:58:13","slug":"optical-injection-molding-tolerances","status":"publish","type":"post","link":"https:\/\/www.jcinjectionmolding.com\/vi\/blog\/optical-injection-molding-tolerances\/","title":{"rendered":"K\u00edch Th\u01b0\u1edbc Ch\u1eb7t Ch\u1ebd V\u1eabn C\u00f3 Th\u1ec3 Kh\u00f4ng \u0110\u1ea1t V\u1ec1 Quang H\u1ecdc"},"content":{"rendered":"
\n

C\u00e1c k\u00edch th\u01b0\u1edbc ch\u1eb7t ch\u1ebd v\u1eabn c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i v\u1ec1 m\u1eb7t quang h\u1ecdc v\u00ec dung sai \u0111\u00fac phun quang h\u1ecdc ph\u1ea3i ki\u1ec3m so\u00e1t c\u00e1c m\u1ed1i quan h\u1ec7, kh\u00f4ng ph\u1ea3i c\u00e1c con s\u1ed1 ri\u00eang l\u1ebb. M\u1ed9t th\u1ea5u k\u00ednh c\u00f3 th\u1ec3 \u0111\u1ea1t c\u00e1c gi\u1edbi h\u1ea1n v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh, \u0111\u1ed9 d\u00e0y v\u00e0 \u0111\u1ed9 ph\u1eb3ng trong khi tr\u1ee5c quang h\u1ecdc c\u1ee7a n\u00f3 b\u1ecb l\u1ec7ch t\u00e2m so v\u1edbi datum g\u00e1 l\u1eafp. M\u1ed9t c\u1eeda s\u1ed5 trong su\u1ed1t c\u00f3 th\u1ec3 v\u01b0\u1ee3t qua ki\u1ec3m tra bi\u00ean d\u1ea1ng v\u00e0 v\u1eabn l\u00e0m bi\u1ebfn d\u1ea1ng h\u00ecnh \u1ea3nh do sai s\u1ed1 h\u00ecnh d\u1ea1ng c\u1ee5c b\u1ed9 ho\u1eb7c \u1ee9ng su\u1ea5t \u0111\u00fac.<\/p>\n

\n

\u0110i\u1ec3m kh\u1edfi \u0111\u1ea7u t\u1ed1t h\u01a1n:<\/strong> x\u00e1c \u0111\u1ecbnh \u0111\u1ea7u ra quang h\u1ecdc v\u00e0 tham chi\u1ebfu c\u01a1 kh\u00ed c\u1ee7a n\u00f3, x\u00e1c \u0111\u1ecbnh bi\u1ebfn thi\u00ean n\u00e0o l\u00e0m thay \u0111\u1ed5i \u0111\u1ea7u ra \u0111\u00f3, sau \u0111\u00f3 g\u00e1n dung sai v\u00e0 ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra cho nh\u1eefng y\u1ebfu t\u1ed1 \u0111\u00f3ng g\u00f3p \u0111\u00f3.<\/p>\n<\/div>\n

Trong b\u00e0i vi\u1ebft n\u00e0y:<\/strong><\/p>\n

    \n
  1. B\u1eaft \u0111\u1ea7u v\u1edbi sai s\u1ed1 ch\u1ee9c n\u0103ng<\/a><\/li>\n
  2. X\u00e2y d\u1ef1ng s\u01a1 \u0111\u1ed3 datum h\u1eefu \u00edch<\/a><\/li>\n
  3. T\u1ea1o ng\u00e2n s\u00e1ch dung sai<\/a><\/li>\n
  4. Kh\u1edbp ph\u00e9p \u0111o v\u1edbi \u0111\u1eb7c tr\u01b0ng<\/a><\/li>\n
  5. S\u1eed d\u1ee5ng n\u0103ng l\u1ef1c m\u00e0 kh\u00f4ng che gi\u1ea5u c\u00e1c khoang<\/a><\/li>\n
  6. C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/a><\/li>\n<\/ol>\n

    Chuy\u1ec3n \u0111\u1ed5i th\u1ea5t b\u1ea1i quang h\u1ecdc th\u00e0nh c\u00e1c y\u1ebfu t\u1ed1 \u0111\u00f3ng g\u00f3p c\u00f3 th\u1ec3 \u0111o l\u01b0\u1eddng<\/h2>\n

    \"engineer-correlating-lens-and-beam-result\"<\/p>\n

    \u0110\u1ed1i v\u1edbi m\u1ed9t quang h\u1ecdc t\u1ea1o \u1ea3nh, k\u1ebft qu\u1ea3 kh\u00f4ng th\u1ec3 ch\u1ea5p nh\u1eadn c\u00f3 th\u1ec3 l\u00e0 m\u1edd, bi\u1ebfn d\u1ea1ng ho\u1eb7c d\u1ecbch ti\u00eau c\u1ef1. \u0110\u1ed1i v\u1edbi m\u1ed9t \u1ed1ng d\u1eabn s\u00e1ng, \u0111\u00f3 c\u00f3 th\u1ec3 l\u00e0 \u0111\u1ed9 kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u \u0111\u1ed9 s\u00e1ng ho\u1eb7c nhi\u1ec5u xuy\u00ean \u00e2m. \u0110\u1ed1i v\u1edbi m\u1ed9t c\u1eeda s\u1ed5 b\u1ea3o v\u1ec7, \u0111\u00f3 c\u00f3 th\u1ec3 l\u00e0 sai s\u1ed1 m\u1eb7t s\u00f3ng truy\u1ec1n qua ho\u1eb7c bi\u1ebfn d\u1ea1ng nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c. M\u1ed7i k\u1ebft qu\u1ea3 ph\u1ea3n \u1ee9ng v\u1edbi m\u1ed9t t\u1ed5 h\u1ee3p kh\u00e1c nhau c\u1ee7a h\u00ecnh h\u1ecdc, v\u1eadt li\u1ec7u v\u00e0 \u1ee9ng su\u1ea5t.<\/p>\n

    S\u1eed d\u1ee5ng ph\u00e2n t\u00edch \u0111\u1ed9 nh\u1ea1y khi c\u00f3 th\u1ec3: thay \u0111\u1ed5i m\u1ed9t y\u1ebfu t\u1ed1 \u0111\u00f3ng g\u00f3p trong m\u00f4 h\u00ecnh quang h\u1ecdc v\u00e0 quan s\u00e1t \u0111\u1ea7u ra. \u0110i\u1ec1u n\u00e0y cho th\u1ea5y li\u1ec7u \u0111\u1ed9 d\u00e0y t\u00e2m, \u0111\u1ed9 cong, \u0111\u1ed9 l\u1ec7ch t\u00e2m, \u0111\u1ed9 nghi\u00eang hay h\u00ecnh d\u1ea1ng b\u1ec1 m\u1eb7t x\u1ee9ng \u0111\u00e1ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd nh\u1ea5t. N\u00f3 c\u0169ng ng\u0103n ch\u1eb7n vi\u1ec7c chi ti\u1ec1n cho c\u00e1c k\u00edch th\u01b0\u1edbc c\u00f3 \u00edt \u0111\u00f2n b\u1ea9y ch\u1ee9c n\u0103ng.<\/p>\n

    S\u01a1 \u0111\u1ed3 datum ph\u1ea3i t\u1ed3n t\u1ea1i qua qu\u00e1 tr\u00ecnh l\u1eafp r\u00e1p<\/h2>\n

    \"lens-mounted-on-functional-datum-features\"<\/p>\n

    Ch\u1ecdn c\u00e1c datum th\u1ec3 hi\u1ec7n c\u00e1ch chi ti\u1ebft \u0111\u01b0\u1ee3c \u0111\u1ecbnh v\u1ecb trong s\u1ea3n ph\u1ea9m. N\u1ebfu ki\u1ec3m tra c\u0103n gi\u1eefa m\u1ed9t th\u1ea5u k\u00ednh tr\u00ean b\u1ec1 m\u1eb7t quang h\u1ecdc c\u1ee7a n\u00f3 nh\u01b0ng l\u1eafp r\u00e1p \u0111\u1ecbnh v\u1ecb n\u00f3 b\u1eb1ng ba \u0111\u1ec7m nh\u1ef1a, hai \u0111i\u1ec1u ki\u1ec7n c\u00f3 th\u1ec3 kh\u00f4ng kh\u1edbp nhau. Li\u00ean h\u1ec7 tr\u1ee5c quang h\u1ecdc ho\u1eb7c kh\u1ea9u \u0111\u1ed9 trong su\u1ed1t v\u1edbi c\u00e1c \u0111\u1eb7c tr\u01b0ng g\u00e1 l\u1eafp th\u1ef1c t\u1ebf.<\/p>\n

    Tr\u00e1nh r\u00e0ng bu\u1ed9c qu\u00e1 m\u1ee9c c\u00e1c chi ti\u1ebft linh ho\u1ea1t trong qu\u00e1 tr\u00ecnh \u0111o. M\u1ed9t \u0111\u1ed3 g\u00e1 \u00e9p ph\u1eb3ng m\u1ed9t c\u1eeda s\u1ed5 b\u1ecb cong v\u00eanh c\u00f3 th\u1ec3 b\u00e1o c\u00e1o m\u1ed9t bi\u00ean d\u1ea1ng ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c m\u00e0 kh\u00f4ng t\u1ed3n t\u1ea1i \u1edf tr\u1ea1ng th\u00e1i t\u1ef1 do. Ng\u01b0\u1ee3c l\u1ea1i, m\u1ed9t c\u1ee5m l\u1eafp r\u00e1p c\u00f3 th\u1ec3 c\u1ed1 \u00fd r\u00e0ng bu\u1ed9c chi ti\u1ebft; trong tr\u01b0\u1eddng h\u1ee3p \u0111\u00f3, x\u00e1c \u0111\u1ecbnh \u0111i\u1ec1u ki\u1ec7n \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t v\u00e0 t\u00e1i t\u1ea1o n\u00f3 m\u1ed9t c\u00e1ch nh\u1ea5t qu\u00e1n.<\/p>\n

    Ph\u00e2n b\u1ed5 sai s\u1ed1 tr\u00ean khu\u00f4n, quy tr\u00ecnh v\u00e0 l\u1eafp r\u00e1p<\/h2>\n

    \"mold-part-and-assembly-tolerance-chain\"<\/p>\n

    C\u0103n ch\u1ec9nh quang h\u1ecdc cu\u1ed1i c\u00f9ng bao g\u1ed3m h\u00ecnh h\u1ecdc khoang, v\u1ecb tr\u00ed mi\u1ebfng ch\u00e8n, \u0111\u1ed9 co ng\u00f3t khi \u00e9p, thay \u0111\u1ed5i khi \u0111\u1ea9y ra, \u0111i\u1ec1u h\u00f2a, bi\u1ebfn thi\u00ean v\u1ecf v\u00e0 t\u1ea3i l\u1eafp r\u00e1p. Vi\u1ec7c g\u00e1n to\u00e0n b\u1ed9 sai s\u1ed1 cho ph\u00e9p cho chi ti\u1ebft \u00e9p s\u1ebd b\u1ecf qua ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a chu\u1ed7i dung sai. Vi\u1ec7c g\u00e1n m\u1ed9t ph\u1ea7n nh\u1ecf kh\u00f4ng th\u1ef1c t\u1ebf cho qu\u00e1 tr\u00ecnh \u00e9p c\u00f3 th\u1ec3 t\u1ea1o ra tranh ch\u1ea5p ki\u1ec3m tra m\u00e0 kh\u00f4ng c\u1ea3i thi\u1ec7n s\u1ea3n ph\u1ea9m.<\/p>\n\n\n\n\n\n\n\n
    Y\u1ebfu t\u1ed1 \u0111\u00f3ng g\u00f3p<\/th>\nC\u00e2u h\u1ecfi \u0111i\u1ec3n h\u00ecnh<\/th>\nL\u1ed9 tr\u00ecnh ki\u1ec3m so\u00e1t<\/th>\n<\/tr>\n<\/thead>\n
    Mi\u1ebfng ch\u00e8n quang h\u1ecdc<\/td>\nH\u00ecnh d\u1ea1ng hay v\u1ecb tr\u00ed c\u00f3 thay \u0111\u1ed5i kh\u00f4ng?<\/td>\n\u0110o l\u01b0\u1eddng mi\u1ebfng ch\u00e8n v\u00e0 truy xu\u1ea5t ngu\u1ed3n g\u1ed1c khoang<\/td>\n<\/tr>\n
    Qu\u00e1 tr\u00ecnh \u00e9p<\/td>\n\u0110\u1ed9 co ng\u00f3t c\u00f3 c\u00f2n \u1ed5n \u0111\u1ecbnh kh\u00f4ng?<\/td>\nNghi\u00ean c\u1ee9u c\u1eeda s\u1ed5 v\u00e0 n\u0103ng l\u1ef1c chi ti\u1ebft<\/td>\n<\/tr>\n
    L\u1eafp r\u00e1p<\/td>\nVi\u1ec7c gi\u1eef c\u00f3 l\u00e0m nghi\u00eang ho\u1eb7c g\u00e2y \u1ee9ng su\u1ea5t l\u00ean linh ki\u1ec7n quang h\u1ecdc kh\u00f4ng?<\/td>\n\u0110\u1ed3 g\u00e1 l\u1eafp r\u00e1p v\u00e0 ki\u1ec3m tra ch\u1ee9c n\u0103ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    M\u1ed9t thi\u1ebft b\u1ecb kh\u00f4ng th\u1ec3 ch\u1ee9ng minh m\u1ecdi y\u00eau c\u1ea7u<\/h2>\n

    \"multiple-instruments-testing-one-optical-part\"<\/p>\n

    \u0110\u1ed3 g\u00e1 ti\u1ebfp x\u00fac c\u00f3 th\u1ec3 ph\u00f9 h\u1ee3p cho \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i nh\u01b0ng c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng ho\u1eb7c bi\u1ebfn d\u1ea1ng b\u1ec1 m\u1eb7t quang h\u1ecdc. H\u1ec7 th\u1ed1ng th\u1ecb gi\u00e1c c\u00f3 th\u1ec3 \u0111o c\u00e1c c\u1ea1nh v\u00e0 chu\u1ea9n nh\u01b0ng c\u00f3 th\u1ec3 kh\u00f4ng n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c h\u00ecnh d\u1ea1ng b\u1ec1 m\u1eb7t ba chi\u1ec1u. Giao thoa k\u1ebf, ph\u00e9p \u0111o bi\u00ean d\u1ea1ng ho\u1eb7c c\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111o l\u01b0\u1eddng quang h\u1ecdc kh\u00e1c c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u cho c\u00e1c b\u1ec1 m\u1eb7t quan tr\u1ecdng, trong khi b\u00e0n ki\u1ec3m tra ch\u1ee9c n\u0103ng x\u00e1c minh ch\u00f9m tia ho\u1eb7c h\u00ecnh \u1ea3nh cu\u1ed1i c\u00f9ng.<\/p>\n

    X\u00e1c \u0111\u1ecbnh \u0111\u1ed3 g\u00e1, h\u01b0\u1edbng, nhi\u1ec7t \u0111\u1ed9, th\u1eddi gian \u0111i\u1ec1u h\u00f2a, c\u00e0i \u0111\u1eb7t b\u1ed9 l\u1ecdc v\u00e0 gi\u1ea3m d\u1eef li\u1ec7u. N\u1ebfu kh\u00f4ng c\u00f3 ph\u01b0\u01a1ng ph\u00e1p chung, hai ph\u00f2ng th\u00ed nghi\u1ec7m c\u00f3 th\u1ec3 b\u00e1o c\u00e1o c\u00e1c gi\u00e1 tr\u1ecb kh\u00e1c nhau cho c\u00f9ng m\u1ed9t chi ti\u1ebft. Ph\u00e2n t\u00edch h\u1ec7 th\u1ed1ng \u0111o l\u01b0\u1eddng n\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u01b0\u1edbc khi tranh lu\u1eadn v\u1ec1 nh\u1eefng kh\u00e1c bi\u1ec7t nh\u1ecf trong qu\u00e1 tr\u00ecnh.<\/p>\n

    D\u1eef li\u1ec7u n\u0103ng l\u1ef1c ph\u1ea3i gi\u1eef ri\u00eang theo t\u1eebng khoang<\/h2>\n

    \"cavity-separated-optical-part-sample-trays\"<\/p>\n

    A combined capability number can hide one poor cavity behind several good ones. Track cavities separately during tool qualification and after maintenance. Also review trends over time; a centered short trial does not prove long-run stability.<\/p>\n

    In \u00c9p phun quang h\u1ecdc & trong su\u1ed1t<\/a>, dimensional capability should be connected to optical output. If a dimension remains capable while functional performance drifts, the control plan is missing a contributor such as stress, surface condition or assembly load.<\/p>\n

    Do not confuse resolution with measurement confidence<\/h3>\n

    An instrument displaying additional decimal places is not automatically capable of accepting a tight tolerance. Fixture repeatability, edge detection, temperature, operator setup and data filtering all contribute uncertainty. Run repeatability and reproducibility work on representative transparent parts, because clear edges can behave differently from calibration artifacts.<\/p>\n

    Freeze the acceptance method with the drawing<\/h3>\n

    State whether surface form is evaluated over the full aperture or after removing tilt and power, whether the part is free or constrained, and how outliers are treated. If buyer and supplier use different filters or fixtures, both can follow the drawing and still disagree. A shared method and correlated samples should be approved before production tooling is released.<\/p>\n

    Review tolerance changes as system changes<\/h3>\n

    Tightening one molded dimension can shift cost into tool correction, cycle time, inspection and yield without improving the assembly. Before revising a limit, rerun the optical sensitivity and stack analysis. Sometimes a locating feature, compliant mount or calibration step controls output more effectively than a tighter lens dimension.<\/p>\n

    For procurement, request the proposed measurement method and capability by cavity rather than a generic promise of \u201chigh precision.\u201d Ask which dimensions are controlled in the mold, which require process compensation, and which optical characteristics are verified functionally. This creates comparable quotations and exposes assumptions early.<\/p>\n

    C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n

    \"quality-engineer-reviewing-optical-tolerances\"<\/p>\n

    Can standard molded-part tolerances be used for lenses?<\/h3>\n

    They can guide nonoptical features, but optical surfaces and axis relationships need function-specific limits and measurement methods.<\/p>\n

    Should the CAD nominal equal the tool surface?<\/h3>\n

    Not necessarily. Predictable molding shrinkage and form change may require compensated steel after stable trial data is available.<\/p>\n

    How should suppliers quote a tight optical tolerance?<\/h3>\n

    They need the drawing, optical function, material grade, measurement definition, sample plan, assembly condition and acceptance data\u2014not the tolerance value alone.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

    Tight dimensions can still fail optically because optical injection molding tolerances must control relationships, not isolated numbers. A lens can meet diameter, thickness and flatness limits while its optical axis is decentered from the mounting datum. A clear window can pass a profile check and still distort an image through local form error or molding […]<\/p>\n","protected":false},"author":1,"featured_media":3786,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3729","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/posts\/3729","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/comments?post=3729"}],"version-history":[{"count":0,"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/posts\/3729\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/media\/3786"}],"wp:attachment":[{"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/media?parent=3729"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/categories?post=3729"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/tags?post=3729"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}