{"id":22,"date":"2026-06-20T10:08:25","date_gmt":"2026-06-20T10:08:25","guid":{"rendered":"https:\/\/www.virgohte.ch\/?page_id=22"},"modified":"2026-06-20T10:08:25","modified_gmt":"2026-06-20T10:08:25","slug":"optical-filters","status":"publish","type":"page","link":"https:\/\/www.virgohte.ch\/?page_id=22","title":{"rendered":"Optical Filters"},"content":{"rendered":"\n<style>\r\n\/* ================================\r\n   VIRGO HTE - CLEAN LANDING MODE\r\n   Rimuove header\/footer WordPress\r\n   e forza la pagina a piena larghezza\r\n================================ *\/\r\n\r\nhtml,\r\nbody {\r\n  margin: 0 !important;\r\n  padding: 0 !important;\r\n  width: 100% !important;\r\n  max-width: 100% !important;\r\n  min-height: 100% !important;\r\n  overflow-x: hidden !important;\r\n  background: #f5f8fb !important;\r\n}\r\n\r\nbody {\r\n  --wp--style--global--content-size: 100% !important;\r\n  --wp--style--global--wide-size: 100% !important;\r\n  --wp--style--root--padding-top: 0px 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24px;text-align:center;background:linear-gradient(135deg,rgba(16,32,51,.96),rgba(27,77,137,.96)),radial-gradient(circle at 80% 20%,rgba(0,166,214,.34),transparent 30%);color:#fff;border-top:1px solid var(--vf-border)}\n.vf-final h2{max-width:960px;margin:0 auto 22px;color:#fff;font-size:46px;line-height:1.1;font-weight:900;letter-spacing:-1px}\n.vf-final p{max-width:800px;margin:0 auto 38px;color:rgba(255,255,255,.84);font-size:18px;line-height:1.7}\n\n@media(max-width:1050px){\n  .vf-header-inner{padding:22px 24px 18px;flex-direction:column;align-items:flex-start;gap:18px}\n  .vf-nav{width:100%;justify-content:flex-start;gap:14px 22px}\n  .vf-hero-inner{grid-template-columns:1fr;padding:78px 30px 66px}\n  .vf-title{font-size:54px}\n  .vf-split{grid-template-columns:1fr}\n  .vf-filter-grid{grid-template-columns:repeat(2,1fr)}\n}\n@media(max-width:650px){\n  .vf-container{padding:0 18px}\n  .vf-logo img{width:210px}\n  .vf-nav{gap:10px 16px}\n  .vf-nav a{font-size:11px}\n  .vf-nav a.vf-nav-button{width:100%;justify-content:center}\n  .vf-hero{min-height:auto}\n  .vf-hero::after{font-size:48px;letter-spacing:4px}\n  .vf-hero-inner{padding:58px 18px 48px}\n  .vf-title{font-size:40px;line-height:1.12}\n  .vf-subtitle{font-size:17px}\n  .vf-buttons{margin-top:34px;gap:14px}\n  .vf-btn{width:100%;min-width:0}\n  .vf-band-row{grid-template-columns:1fr}\n  .vf-list,.vf-filter-grid,.vf-application-grid{grid-template-columns:1fr}\n  .vf-section,.vf-final{padding-top:68px;padding-bottom:74px}\n  .vf-heading h2,.vf-final h2{font-size:31px}\n  .vf-heading p,.vf-final p{font-size:16px}\n  .vf-panel,.vf-filter-card,.vf-application{padding:24px}\n}\n<\/style>\n\n<div class=\"vf-page\">\n\n<header class=\"vf-header\">\n  <div class=\"vf-container vf-header-inner\">\n    <a class=\"vf-logo\" href=\"\/\">\n      <img decoding=\"async\" src=\"https:\/\/www.virgohte.ch\/wp-content\/uploads\/2026\/06\/log_V11.png\" alt=\"Virgo HTE logo\">\n    <\/a>\n\n    <nav class=\"vf-nav\" aria-label=\"Virgo HTE navigation\">\n      <a href=\"\/\">Home<\/a>\n      <a href=\"\/expertise\/\">Expertise<\/a>\n      <a href=\"\/filters\/\" class=\"active\">Filters<\/a>\n      <a href=\"\/applications\/\">Applications<\/a>\n      <a href=\"\/experience\/\">Experience<\/a>\n      <a href=\"\/contact\/\" class=\"vf-nav-button\">Contact<\/a>\n    <\/nav>\n  <\/div>\n<\/header>\n\n<main class=\"vf-main\">\n\n<section class=\"vf-hero\">\n  <div class=\"vf-container vf-hero-inner\">\n\n    <div class=\"vf-hero-content\">\n      <div class=\"vf-eyebrow\">Interference Optical Filters<\/div>\n\n      <h1 class=\"vf-title\">\n        Custom Optical Filters\n        <span>for UV, VIS &#038; IR Systems<\/span>\n      <\/h1>\n\n      <div class=\"vf-line\"><\/div>\n\n      <p class=\"vf-subtitle\">\n        Virgo HTE builds on long-standing know-how in\n        <strong>interference filters, dichroic coatings, laser filters, high-reflectivity mirrors\n        and customized spectral treatments<\/strong> for demanding optical systems.\n      <\/p>\n\n      <div class=\"vf-buttons\">\n        <a href=\"#examples\" class=\"vf-btn vf-btn-primary\">View Filter Examples<\/a>\n        <a href=\"mailto:info@virgohte.ch\" class=\"vf-btn vf-btn-outline\">Request Information<\/a>\n      <\/div>\n    <\/div>\n\n    <div class=\"vf-spectrum-card\">\n      <div class=\"vf-spectrum-top\">\n        <div class=\"vf-spectrum-title\">Spectral Engineering<\/div>\n        <div class=\"vf-spectrum-status\">UV \/ VIS \/ IR<\/div>\n      <\/div>\n\n      <div class=\"vf-spectrum-body\">\n        <div class=\"vf-spectrum-bar\" aria-label=\"Optical spectrum\"><\/div>\n\n        <div class=\"vf-band\">\n          <div class=\"vf-band-row\">\n            <div class=\"vf-band-label\">UV<\/div>\n            <div class=\"vf-band-track\"><i style=\"width:28%\"><\/i><\/div>\n            <div class=\"vf-band-value\">186 nm+<\/div>\n          <\/div>\n\n          <div class=\"vf-band-row\">\n            <div class=\"vf-band-label\">Visible<\/div>\n            <div class=\"vf-band-track\"><i style=\"width:72%\"><\/i><\/div>\n            <div class=\"vf-band-value\">VIS<\/div>\n          <\/div>\n\n          <div class=\"vf-band-row\">\n            <div class=\"vf-band-label\">Infrared<\/div>\n            <div class=\"vf-band-track\"><i style=\"width:92%\"><\/i><\/div>\n            <div class=\"vf-band-value\">up to IR<\/div>\n          <\/div>\n\n          <div class=\"vf-band-row\">\n            <div class=\"vf-band-label\">Custom<\/div>\n            <div class=\"vf-band-track\"><i style=\"width:84%\"><\/i><\/div>\n            <div class=\"vf-band-value\">On request<\/div>\n          <\/div>\n        <\/div>\n\n        <p class=\"vf-spectrum-note\">\n          Interference filters are designed by controlling multilayer optical coatings\n          to obtain specific transmission, reflection, blocking and spectral-shaping behavior.\n        <\/p>\n      <\/div>\n    <\/div>\n\n  <\/div>\n<\/section>\n\n<section class=\"vf-section vf-section-white\">\n  <div class=\"vf-section-inner\">\n    <div class=\"vf-heading\">\n      <p class=\"vf-kicker\">Technology<\/p>\n      <h2>Interference filters for precise spectral control<\/h2>\n      <p>\n        Interference optical filters use thin-film multilayer coatings to control how light is\n        transmitted, reflected or blocked. They are used when an optical system requires a\n        specific wavelength band, high blocking outside the passband, high reflection,\n        thermal stability or customized spectral performance.\n      <\/p>\n    <\/div>\n\n    <div class=\"vf-split\">\n      <div class=\"vf-panel\">\n        <h3>Custom spectral solutions<\/h3>\n        <p>\n          The historical know-how behind Virgo HTE includes optical filters and coatings\n          for ultraviolet, visible and infrared applications, including filters developed\n          according to customer requirements.\n        <\/p>\n        <p>\n          Typical requirements include temperature resistance, humidity stability,\n          abrasion resistance, spectral precision and compatibility with demanding\n          optical, industrial or scientific environments.\n        <\/p>\n      <\/div>\n\n      <div class=\"vf-list\">\n        <div class=\"vf-list-item\">\n          <div class=\"vf-icon\">\u03bb<\/div>\n          <h4>Spectral selection<\/h4>\n          <p>Transmission or reflection of selected wavelength ranges with controlled blocking.<\/p>\n        <\/div>\n\n        <div class=\"vf-list-item\">\n          <div class=\"vf-icon\">R<\/div>\n          <h4>High reflection<\/h4>\n          <p>Dielectric or metallic mirrors for high-performance optical and measurement systems.<\/p>\n        <\/div>\n\n        <div class=\"vf-list-item\">\n          <div class=\"vf-icon\">IR<\/div>\n          <h4>VIS \/ IR systems<\/h4>\n          <p>Optical windows, sensor filters and coatings for visible and infrared applications.<\/p>\n        <\/div>\n\n        <div class=\"vf-list-item\">\n          <div class=\"vf-icon\">MIL<\/div>\n          <h4>Demanding use<\/h4>\n          <p>Coatings designed for robust environments, cleaning, temperature variation and stability.<\/p>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/section>\n\n<section id=\"examples\" class=\"vf-section\">\n  <div class=\"vf-section-inner\">\n    <div class=\"vf-heading\">\n      <p class=\"vf-kicker\">Examples<\/p>\n      <h2>Examples of interference optical filters<\/h2>\n      <p>\n        The following examples show typical filter categories that can be engineered,\n        optimized or specified for industrial optics, laser systems, scientific instruments,\n        medical devices and optoelectronic applications.\n      <\/p>\n    <\/div>\n\n    <div class=\"vf-filter-grid\">\n\n      <article class=\"vf-filter-card\">\n        <span class=\"vf-filter-type\">Bandpass<\/span>\n        <h3>Narrowband Bandpass Filters<\/h3>\n        <p>\n          Filters designed to transmit a defined wavelength band while blocking neighboring\n          spectral regions. Used in sensing, fluorescence, measurement and laser systems.\n        <\/p>\n        <div class=\"vf-mini-spectrum\"><i style=\"width:34%\"><\/i><\/div>\n      <\/article>\n\n      <article class=\"vf-filter-card\">\n        <span class=\"vf-filter-type\">Multi-band<\/span>\n        <h3>Multiband Filters<\/h3>\n        <p>\n          Filters with two or more transmission bands, allowing multiple spectral channels\n          to be combined within a single optical element or sensor system.\n        <\/p>\n        <div class=\"vf-mini-spectrum\"><i style=\"width:62%\"><\/i><\/div>\n      <\/article>\n\n      <article class=\"vf-filter-card\">\n        <span class=\"vf-filter-type\">Dichroic<\/span>\n        <h3>Dichroic Filters &#038; Mirrors<\/h3>\n        <p>\n          Optical coatings that reflect one spectral range while transmitting another,\n          commonly used in beam splitting, color separation and multi-channel imaging.\n        <\/p>\n        <div class=\"vf-mini-spectrum\"><i style=\"width:78%\"><\/i><\/div>\n      <\/article>\n\n      <article class=\"vf-filter-card\">\n        <span class=\"vf-filter-type\">Notch<\/span>\n        <h3>Notch Filters<\/h3>\n        <p>\n          Filters that suppress a narrow wavelength region while transmitting the surrounding\n          spectral ranges, useful for Raman spectroscopy and laser rejection.\n        <\/p>\n        <div class=\"vf-mini-spectrum\"><i style=\"width:45%\"><\/i><\/div>\n      <\/article>\n\n      <article class=\"vf-filter-card\">\n        <span class=\"vf-filter-type\">Laser<\/span>\n        <h3>Laser Clean-up Filters<\/h3>\n        <p>\n          Narrow filters used to clean unwanted spectral components from a laser source,\n          improving signal quality and reducing optical noise in measurement setups.\n        <\/p>\n        <div class=\"vf-mini-spectrum\"><i style=\"width:56%\"><\/i><\/div>\n      <\/article>\n\n      <article class=\"vf-filter-card\">\n        <span class=\"vf-filter-type\">Raman<\/span>\n        <h3>Raman Spectroscopy Filters<\/h3>\n        <p>\n          High-performance filters for Raman systems, designed to isolate weak spectral\n          signals while suppressing excitation wavelength components.\n        <\/p>\n        <div class=\"vf-mini-spectrum\"><i style=\"width:68%\"><\/i><\/div>\n      <\/article>\n\n      <article class=\"vf-filter-card\">\n        <span class=\"vf-filter-type\">Fluorescence<\/span>\n        <h3>Fluorescence Microscopy Filters<\/h3>\n        <p>\n          Excitation, emission and dichroic filter sets for fluorescence imaging systems,\n          medical diagnostics and high-contrast optical analysis.\n        <\/p>\n        <div class=\"vf-mini-spectrum\"><i style=\"width:72%\"><\/i><\/div>\n      <\/article>\n\n      <article class=\"vf-filter-card\">\n        <span class=\"vf-filter-type\">Chirped<\/span>\n        <h3>Chirped Mirrors<\/h3>\n        <p>\n          Dispersive mirrors designed to manage chromatic dispersion in ultrafast laser\n          systems, femtosecond applications and high-precision optical setups.\n        <\/p>\n        <div class=\"vf-mini-spectrum\"><i style=\"width:88%\"><\/i><\/div>\n      <\/article>\n\n      <article class=\"vf-filter-card\">\n        <span class=\"vf-filter-type\">Rugate<\/span>\n        <h3>Rugate Filters<\/h3>\n        <p>\n          Advanced filters with a continuously varying refractive index profile, suitable\n          for tailored spectral response and complex optical filter functions.\n        <\/p>\n        <div class=\"vf-mini-spectrum\"><i style=\"width:82%\"><\/i><\/div>\n      <\/article>\n\n    <\/div>\n  <\/div>\n<\/section>\n\n<section class=\"vf-section vf-section-white\">\n  <div class=\"vf-section-inner\">\n    <div class=\"vf-heading\">\n      <p class=\"vf-kicker\">Applications<\/p>\n      <h2>Typical applications<\/h2>\n      <p>\n        Interference filters and custom optical coatings can support a broad range of high-tech\n        applications where spectral precision, durability and optical performance are essential.\n      <\/p>\n    <\/div>\n\n    <div class=\"vf-application-grid\">\n\n      <article class=\"vf-application\">\n        <span>Scientific instrumentation<\/span>\n        <h3>Spectroscopy &#038; optical measurement<\/h3>\n        <p>\n          Filters and mirrors for spectrometers, optical measurement systems,\n          astronomy instruments and laboratory equipment.\n        <\/p>\n      <\/article>\n\n      <article class=\"vf-application\">\n        <span>Laser systems<\/span>\n        <h3>Laser protection and beam conditioning<\/h3>\n        <p>\n          Clean-up filters, blocking filters, laser mirrors and optical coatings for\n          pulsed lasers, femtosecond lasers and specialized laser setups.\n        <\/p>\n      <\/article>\n\n      <article class=\"vf-application\">\n        <span>Medical optics<\/span>\n        <h3>Diagnostics, IPL and dermatology<\/h3>\n        <p>\n          Optical filters for IPL systems, skin treatment devices, diagnostic equipment\n          and medical laser protection applications.\n        <\/p>\n      <\/article>\n\n      <article class=\"vf-application\">\n        <span>VIS \/ IR imaging<\/span>\n        <h3>Sensors, cameras and surveillance optics<\/h3>\n        <p>\n          Filters, windows and coatings for visible and infrared cameras, thermal imaging,\n          sensor protection and long-range optoelectronic systems.\n        <\/p>\n      <\/article>\n\n      <article class=\"vf-application\">\n        <span>Aerospace<\/span>\n        <h3>Space and aviation components<\/h3>\n        <p>\n          Coatings for demanding environmental conditions, satellite instruments,\n          optical protection windows and mission-related optical components.\n        <\/p>\n      <\/article>\n\n      <article class=\"vf-application\">\n        <span>Industrial optics<\/span>\n        <h3>Custom optical systems<\/h3>\n        <p>\n          Application-specific optical filters and coatings for inspection, colorimetry,\n          machine vision, industrial sensors and custom engineering projects.\n        <\/p>\n      <\/article>\n\n    <\/div>\n  <\/div>\n<\/section>\n\n<section class=\"vf-final\">\n  <h2>Need a custom interference filter or optical coating?<\/h2>\n  <p>\n    Virgo HTE can support specification, feasibility evaluation and custom engineering\n    for optical filters, coatings, mirrors and high-performance optical components.\n  <\/p>\n  <div class=\"vf-buttons\" style=\"justify-content:center;\">\n    <a class=\"vf-btn vf-btn-primary\" href=\"mailto:info@virgohte.ch\">Contact Virgo HTE<\/a>\n    <a class=\"vf-btn vf-btn-outline\" href=\"\/expertise\/\">Explore Expertise<\/a>\n  <\/div>\n<\/section>\n\n<\/main>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Home Expertise Filters Applications Experience Contact Interference Optical Filters Custom Optical Filters for UV, VIS &#038; IR Systems Virgo HTE builds on long-standing know-how in interference filters, dichroic coatings, laser filters, high-reflectivity mirrors and customized spectral treatments for demanding optical systems. View Filter Examples Request Information Spectral Engineering UV \/ VIS \/ IR UV 186 [&hellip;]<\/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-22","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.virgohte.ch\/index.php?rest_route=\/wp\/v2\/pages\/22","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.virgohte.ch\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.virgohte.ch\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.virgohte.ch\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.virgohte.ch\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=22"}],"version-history":[{"count":1,"href":"https:\/\/www.virgohte.ch\/index.php?rest_route=\/wp\/v2\/pages\/22\/revisions"}],"predecessor-version":[{"id":23,"href":"https:\/\/www.virgohte.ch\/index.php?rest_route=\/wp\/v2\/pages\/22\/revisions\/23"}],"wp:attachment":[{"href":"https:\/\/www.virgohte.ch\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=22"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}