{"id":930,"date":"2013-07-24T00:00:20","date_gmt":"2013-07-23T15:00:20","guid":{"rendered":"https:\/\/toa-rika.co.jp\/en\/?p=930"},"modified":"2020-10-27T16:40:14","modified_gmt":"2020-10-27T07:40:14","slug":"introduction-of-our-bandpass-filter-bpf-part-ii","status":"publish","type":"post","link":"https:\/\/www.toa-rika.co.jp\/en\/introduction-of-our-bandpass-filter-bpf-part-ii\/","title":{"rendered":"Introduction of our bandpass filter (BPF) Part II"},"content":{"rendered":"
\r\n
\r\n\r\n

Bandpass filter (BPF) is an optical component which transmits arbitrary wavelengths and blocks other wavelengths.
\r\nIt removes noises of optical sensor, image processing, and detector as a optical receiver.
\r\nWe provide high-precision filter function with our leading thin-film technology<\/u><\/a>.
\r\nFollowings are the introduction of our BPF (near-infrared \uff5e mid-infrared \uff5e far-infrared).<\/p>\r\n

\u25a0Near-infrared BPF for communications (\u03bb = 1,064nm \/ 1,550nm)<\/p>\r\n

<\/p>\r\n\"\"\r\n\r\n

The Wavelength of 1,550nm, at which light loss of optical fiber for communications can be minimized, is selected to reduce transmission loss of long-distance communications.
\r\nAlso, central wavelength of Nd:YAG laser is 1,064nm, which is most commonly applied for medical, industrial, and R&D use.<\/p>\r\nApplications:<\/strong>\r\n

  • Digital cable of TV base-station<\/li>\r\n
  • Network of projected image line<\/li>\r\n
  • Nd:YAG laser (1,064nm)<\/li>

    \r\n\r\n

    \u25a0Mid-infrared BPF (\u03bb = 2.75\u03bcm \/ 3.3\u03bcm \/ 4.25\u03bcm\/ 4.75\u03bcm)<\/p>\r\n

    \"\"<\/p>\r\n

    It is a BPF in mid-infrared range (2.5\uff5e4\u03bcm level).
    \r\nCarbon dioxide (CO2) has its absorption spectrum at 2,349cm-1(4.25\u03bcm\uff09, while methane (CH4) has at 3,300cm-1(3.3\u03bcm).
    \r\nSpecific wavelength can be transmitted effectively by using BPF.<\/p>\r\n\r\nApplications:<\/strong>\r\n

  • Gas detector<\/li>\r\n
  • Fire detector<\/li>

    \r\n\r\n

    It is possible to apply water and oil repellent coating to infrared lens of heat detector sensor installed at an outdoor or in a factory line.<\/p>\r\n

    \u25a0Far-infrared BPF<\/p>\r\n\r\n

    <\/div>\r\n

    \"\"<\/p>\r\n

    It is used for sensing the heat including human body temperature.
    \r\nSince this BPF can check the temperature distribution of land surface and cloud from a satellite or an airplane, it becomes an essential technology to research on global warming, too.
    \r\nBesides being observable during nighttime, it has the advantage that less affected by the noise of the air because wavelength is longer than visible light.<\/p>\r\n\r\nApplications:<\/strong>\r\n

  • Remote sensing<\/li>\r\n
  • Observing sensor<\/li>

    \r\n

    \r\nPlease feel free to     contact us<\/a> for any questions.\r\n\r\n<\/div>\r\n\r\n\r\n<\/div>","protected":false},"excerpt":{"rendered":"Bandpass filter (BPF) is an optical component which transmits arbitrary wavelengths and blocks other wavelengt […]","protected":false},"author":3,"featured_media":509,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[2],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.toa-rika.co.jp\/en\/wp-json\/wp\/v2\/posts\/930"}],"collection":[{"href":"https:\/\/www.toa-rika.co.jp\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.toa-rika.co.jp\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.toa-rika.co.jp\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.toa-rika.co.jp\/en\/wp-json\/wp\/v2\/comments?post=930"}],"version-history":[{"count":10,"href":"https:\/\/www.toa-rika.co.jp\/en\/wp-json\/wp\/v2\/posts\/930\/revisions"}],"predecessor-version":[{"id":943,"href":"https:\/\/www.toa-rika.co.jp\/en\/wp-json\/wp\/v2\/posts\/930\/revisions\/943"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.toa-rika.co.jp\/en\/wp-json\/wp\/v2\/media\/509"}],"wp:attachment":[{"href":"https:\/\/www.toa-rika.co.jp\/en\/wp-json\/wp\/v2\/media?parent=930"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.toa-rika.co.jp\/en\/wp-json\/wp\/v2\/categories?post=930"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.toa-rika.co.jp\/en\/wp-json\/wp\/v2\/tags?post=930"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}