40mm Dia. x 4mm MgF<sub>2</sub> Coated, N-BK7 Window

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- Google
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  该提供商收集的部分数据用于个性化和衡量广告效果。
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  最大存储时长: 临时类别: 像素追踪器
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  .AspNetCore.Mvc.CookieTempDataProviderPreserves the visitor's session state across page requests.
  最大存储时长: 临时类别: HTTP Cookie
  UMB_SESSIONStores domain prefix to determine whether it holds https or http URL properties.
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偏好cookie能够使网站记住更改网站行为或外观的信息，就好比您的首选语言或所在地区一样。
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  lidcRegisters which server-cluster is serving the visitor. This is used in context with load balancing, in order to optimize user experience.
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  __lc_cidNecessary for the functionality of the website's chat-box function.
  最大存储时长: 400 天类别: HTTP Cookie
  __lc_cstNecessary for the functionality of the website's chat-box function.
  最大存储时长: 400 天类别: HTTP Cookie
  __oauth_redirect_detectorAllows the website to recoqnise the visitor, in order to optimize the chat-box functionality.
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  @@lc_auth_token:3b0f44ba-5eb5-4bb1-a9e1-2214776a186bNecessary for the functionality of the website's chat-box function.
  最大存储时长: 永久类别: HTML 本地存储
  @@lc_privacy_policy:3b0f44ba-5eb5-4bb1-a9e1-2214776a186bNecessary for the functionality of the website's chat-box function.
  最大存储时长: 永久类别: HTML 本地存储
  3b0f44ba-5eb5-4bb1-a9e1-2214776a186b:stateNecessary for the functionality of the website's chat-box function.
  最大存储时长: 永久类别: HTML 本地存储
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  chatEngagedIndicates whether the user has interacted with the website's chat-box, in order to determine whether they should be shown chat invites.
  最大存储时长: 14 天类别: HTTP Cookie
统计cookie能够通过收集和匿名报告信息帮助网站拥有者了解访客与网站互动的方式。
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  _conv_rThis cookie is used as a referral-cookie that stores the visitor’s profile – the cookie is overwritten when the visitor re-enters the website and new information on the visitor is collected and stored.
  最大存储时长: 临时类别: HTTP Cookie
  _conv_sThis cookie contains an ID string on the current session. This contains non-personal information on what subpages the visitor enters – this information is used to optimize the visitor's experience.
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  _conv_vThis cookie is used to identify the frequency of visits and how long the visitor is on the website. The cookie is also used to determine how many and which subpages the visitor visits on a website – this information can be used by the website to optimize the domain and its subpages.
  最大存储时长: 6 月类别: HTTP Cookie
- Livechat
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  _livechat_has_visitedIdentifies the visitor across devices and visits, in order to optimize the chat-box function on the website.
  最大存储时长: 永久类别: HTML 本地存储
- edmundoptics.com.tw
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  ce_diff_timeUsed by Crazy Egg to offset time for analytics purposes.
  最大存储时长: 14 天类别: HTTP Cookie
  ce_ip_addressUsed by Crazy Egg to store the user's IP address.
  最大存储时长: 14 天类别: HTTP Cookie
营销cookie用于对网站上的访客进行追踪。其目的是为了显示对个人用户来说相关及有吸引力的广告，因此，对于发布人和第三方广告商来说更为宝贵。
- Meta Platforms, Inc.
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  _fbp [x2]Used by Facebook to deliver a series of advertisement products such as real time bidding from third party advertisers.
  最大存储时长: 3 月类别: HTTP Cookie
  lastExternalReferrerDetects how the user reached the website by registering their last URL-address.
  最大存储时长: 永久类别: HTML 本地存储
  lastExternalReferrerTimeDetects how the user reached the website by registering their last URL-address.
  最大存储时长: 永久类别: HTML 本地存储
  log/errorUsed to detect and log potential tracking errors.
  最大存储时长: 临时类别: 像素追踪器
  topicsLastReferenceTimeCollects data on the user across websites - This data is used to make advertisement more relevant.
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  _conv_sptestThis cookie is used by the website’s operator in context with multi-variate testing. This is a tool used to combine or change content on the website. This allows the website to find the best variation/edition of the site.
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- Google
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  该提供商收集的部分数据用于个性化和衡量广告效果。
  _ga [x2]Used to send data to Google Analytics about the visitor's device and behavior. Tracks the visitor across devices and marketing channels.
  最大存储时长: 25 月类别: HTTP Cookie
  _ga_# [x3]Used to send data to Google Analytics about the visitor's device and behavior. Tracks the visitor across devices and marketing channels.
  最大存储时长: 25 月类别: HTTP Cookie
  _gcl_au [x2]Used by Google AdSense for experimenting with advertisement efficiency across websites using their services.
  最大存储时长: 3 月类别: HTTP Cookie
  IDEUsed by Google DoubleClick to register and report the website user's actions after viewing or clicking one of the advertiser's ads with the purpose of measuring the efficacy of an ad and to present targeted ads to the user.
  最大存储时长: 400 天类别: HTTP Cookie
  NIDRegisters a unique ID that identifies a returning user's device. The ID is used for targeted ads.
  最大存储时长: 6 月类别: HTTP Cookie
  pagead/1p-user-list/#Tracks if the user has shown interest in specific products or events across multiple websites and detects how the user navigates between sites. This is used for measurement of advertisement efforts and facilitates payment of referral-fees between websites.
  最大存储时长: 临时类别: 像素追踪器
  rc::aThis cookie is used to distinguish between humans and bots. This is beneficial for the website, in order to make valid reports on the use of their website.
  最大存储时长: 永久类别: HTML 本地存储
  rc::cThis cookie is used to distinguish between humans and bots.
  最大存储时长: 临时类别: HTML 本地存储
  _gcl_lsGoogle Ads uses it for tracking conversions and measuring campaign performance.
  最大存储时长: 永久类别: HTML 本地存储
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  wisepops_tld [x2]Used in context with pop-up advertisement-content on the website. The cookie determines which ads the visitor should be shown, as well as ensuring that the same ads does not get shown more than intended.
  最大存储时长: 临时类别: HTTP Cookie
  wisepops_visitor [x3]Sets a unique ID for the visitor, that allows third party advertisers to target the visitor with relevant advertisement. This pairing service is provided by third party advertisement hubs, which facilitates real-time bidding for advertisers.
  最大存储时长: 临时类别: HTTP Cookie
  wisepopsUsed in context with pop-up advertisement-content on the website. The cookie determines which ads the visitor should be shown, as well as ensuring that the same ads does not get shown more than intended.
  最大存储时长: 临时类别: HTTP Cookie
  wisepops_propsUsed in context with pop-up advertisement-content on the website. The cookie determines which ads the visitor should be shown, as well as ensuring that the same ads does not get shown more than intended.
  最大存储时长: 临时类别: HTTP Cookie
  wisepops_sessionUsed in context with pop-up advertisement-content on the website. The cookie determines which ads the visitor should be shown, as well as ensuring that the same ads does not get shown more than intended.
  最大存储时长: 临时类别: HTTP Cookie
  wisepops_visitsUsed in context with pop-up advertisement-content on the website. The cookie determines which ads the visitor should be shown, as well as ensuring that the same ads does not get shown more than intended.
  最大存储时长: 临时类别: HTTP Cookie
  wisepops_session_idSets a unique ID for the session. This allows the website to obtain data on visitor behaviour for statistical purposes.
  最大存储时长: 临时类别: HTML 本地存储
  wisepops_session_landing_urlStores visitors' navigation by registering landing pages - This allows the website to present relevant products and/or measure their advertisement efficiency on other websites.
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  wisepops_session_referrerCollects data on visitors' behaviour and interaction - This is used to make advertisement on the website more relevant. The cookie also allows the website to detect any referrals from other websites.
  最大存储时长: 临时类别: HTML 本地存储
  wisepops-pageview_idDetermines when the visitor last visited the different subpages on the website, as well as sets a timestamp for when the session started.
  最大存储时长: 临时类别: HTML 本地存储
  wisepops-uses-attentionUsed in context with pop-up advertisement-content on the website. The cookie determines which ads the visitor should be shown, as well as ensuring that the same ads does not get shown more than intended.
  最大存储时长: 临时类别: HTML 本地存储
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  __Secure-ROLLOUT_TOKENRegisters a unique ID to keep statistics of what videos from YouTube the user has seen.
  最大存储时长: 180 天类别: HTTP Cookie
  __Secure-YECStores the user's video player preferences using embedded YouTube video
  最大存储时长: 临时类别: HTTP Cookie
  __Secure-YNID待定
  最大存储时长: 180 天类别: HTTP Cookie
  LAST_RESULT_ENTRY_KEYUsed to track user’s interaction with embedded content.
  最大存储时长: 临时类别: HTTP Cookie
  LogsDatabaseV2:V#||LogsRequestsStoreUsed to track user’s interaction with embedded content.
  最大存储时长: 永久类别: IndexedDB
  remote_sidNecessary for the implementation and functionality of YouTube video-content on the website.
  最大存储时长: 临时类别: HTTP Cookie
  ServiceWorkerLogsDatabase#SWHealthLogNecessary for the implementation and functionality of YouTube video-content on the website.
  最大存储时长: 永久类别: IndexedDB
  TESTCOOKIESENABLEDUsed to track user’s interaction with embedded content.
  最大存储时长: 1 天类别: HTTP Cookie
  VISITOR_INFO1_LIVETries to estimate the users' bandwidth on pages with integrated YouTube videos.
  最大存储时长: 180 天类别: HTTP Cookie
  YSCRegisters a unique ID to keep statistics of what videos from YouTube the user has seen.
  最大存储时长: 临时类别: HTTP Cookie
  ytidb::LAST_RESULT_ENTRY_KEYUsed to track user’s interaction with embedded content.
  最大存储时长: 永久类别: HTML 本地存储
  YtIdbMeta#databasesUsed to track user’s interaction with embedded content.
  最大存储时长: 永久类别: IndexedDB
  yt-remote-cast-availableStores the user's video player preferences using embedded YouTube video
  最大存储时长: 临时类别: HTML 本地存储
  yt-remote-cast-installedStores the user's video player preferences using embedded YouTube video
  最大存储时长: 临时类别: HTML 本地存储
  yt-remote-connected-devicesStores the user's video player preferences using embedded YouTube video
  最大存储时长: 永久类别: HTML 本地存储
  yt-remote-device-idStores the user's video player preferences using embedded YouTube video
  最大存储时长: 永久类别: HTML 本地存储
  yt-remote-fast-check-periodStores the user's video player preferences using embedded YouTube video
  最大存储时长: 临时类别: HTML 本地存储
  yt-remote-session-appStores the user's video player preferences using embedded YouTube video
  最大存储时长: 临时类别: HTML 本地存储
  yt-remote-session-nameStores the user's video player preferences using embedded YouTube video
  最大存储时长: 临时类别: HTML 本地存储
- edmundoptics.com.tw
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  _gaexpThis cookie is used by Google Analytics to determine if the visitor is involved in their marketing experiments.
  最大存储时长: 14 天类别: HTTP Cookie
  _mkto_trkContains data on visitor behaviour and website interaction. This is used in context with the email marketing service Marketo.com, which allows the website to target visitors via email.
  最大存储时长: 14 天类别: HTTP Cookie
  gwccEnables Google Website Call Conversions - This registers if the visitor has clicked on call within the "contact us" sub-page. This information is used for statistics and marketing purposes.
  最大存储时长: 14 天类别: HTTP Cookie
  mTracking pixel used by South Korean Company, Naver Analytics to track website engagement
  最大存储时长: 14 天类别: HTTP Cookie
  NWBUsed by South Korean Company, Naver Analytics for web analytics that tracks and reports website traffic
  最大存储时长: 14 天类别: HTTP Cookie
  NWB_LEGACYUsed by South Korean Company, Naver Analytics for web analytics that tracks and reports website traffic
  最大存储时长: 14 天类别: HTTP Cookie
  wcs_btUsed by South Korean Company, Naver Analytics for cross site web analytics
  最大存储时长: 14 天类别: HTTP Cookie
未分类cookie指的是我们正在同个人Cookie提供者一起分类的cookie。

Cookie 声明由Cookiebot最后更新于 10/23/25

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#27-855 - 40mm Dia. x 4mm MgF₂ Coated, N-BK7 Window

產品已停產

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25.4mm Dia., 4mm Thick, MgF₂ Coated λ/4 N-BK7 Window

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75mm Sq, 4mm Thick,. MgF₂ Coated λ/4 N-BK7 Window

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5mm Dia., 2mm Thick, MgF₂ Coated λ/4 N-BK7 Window

9mm Dia., 2mm Thick, MgF₂ Coated λ/4 N-BK7 Window

50mm Dia., 2mm Thick, MgF₂ Coated λ/4 N-BK7 Window

25mm Dia., 2mm Thick, MgF₂ Coated λ/4 N-BK7 Window

#27-855 - 40mm Dia. x 4mm MgF2 Coated, N-BK7 Window

產品已停產

Recommended Replacements

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30mm Dia., 4mm Thick, MgF2 Coated λ/4 N-BK7 Window

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50mm Sq., 4mm Thick, MgF2 Coated λ/4 N-BK7 Window

25mm Sq., 4mm Thick, MgF2 Coated λ/4 N-BK7 Window

75mm Sq, 4mm Thick,. MgF2 Coated λ/4 N-BK7 Window

50.8mm Dia., 4mm Thick, MgF2 Coated λ/4 N-BK7 Window

10mm Dia., 2mm Thick, MgF2 Coated λ/4 N-BK7 Window

5mm Dia., 2mm Thick, MgF2 Coated λ/4 N-BK7 Window

9mm Dia., 2mm Thick, MgF2 Coated λ/4 N-BK7 Window

50mm Dia., 2mm Thick, MgF2 Coated λ/4 N-BK7 Window

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