{"id":157,"date":"2026-09-26T20:43:22","date_gmt":"2026-09-26T12:43:22","guid":{"rendered":"https:\/\/enochvision.com\/products\/cp-18b\/"},"modified":"2026-09-26T22:43:30","modified_gmt":"2026-09-26T14:43:30","slug":"cp-18b","status":"publish","type":"page","link":"https:\/\/enochvision.com\/es\/products\/cp-18b\/","title":{"rendered":"CP-18B Multi-function lens tester for UV, blue and visible light"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"157\" class=\"elementor elementor-157\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b64ce42 e-con-full e-flex e-con e-parent\" data-id=\"b64ce42\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-18f135d elementor-widget elementor-widget-html\" data-id=\"18f135d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<div class=\"ev\"><div class=\"ev-wrap\"><nav class=\"ev-crumb\" aria-label=\"Breadcrumb\"><a href=\"\/\">Home<\/a><span aria-hidden=\"true\">\/<\/span><a href=\"\/products\/\">Equipment<\/a><span aria-hidden=\"true\">\/<\/span><a href=\"\/lens-testers\/\">Lens Testers<\/a><span aria-hidden=\"true\">\/<\/span><span aria-current=\"page\">CP-18B<\/span><\/nav><section class=\"ev-p-top\"><div class=\"ev-p-gallery\"><div class=\"ev-p-main\"><div class=\"ev-p-main__top\"><span>LENS TRANSMITTANCE TESTER<\/span><span>CP-18B<\/span><\/div><div class=\"ev-p-main__img\"><img fetchpriority=\"high\" decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/09\/cp-18b-lens-transmittance-tester-uv-blue-light.jpg\" alt=\"CP-18B lens transmittance tester with detection head and color screen showing visible, UV400, blue 430 and blue 465 readings\" width=\"1536\" height=\"1024\" fetchpriority=\"high\"><\/div><\/div><div class=\"ev-p-thumbs\"><button type=\"button\" aria-pressed=\"true\" aria-label=\"Show photo 1\" data-src=\"\/wp-content\/uploads\/2026\/09\/cp-18b-lens-transmittance-tester-uv-blue-light.jpg\" data-alt=\"CP-18B lens transmittance tester with detection head and color screen showing visible, UV400, blue 430 and blue 465 readings\" onclick=\"var g=this.closest('.ev-p-gallery'),m=g.querySelector('.ev-p-main__img img');m.src=this.dataset.src;m.alt=this.dataset.alt;m.removeAttribute('srcset');g.querySelectorAll('.ev-p-thumbs button').forEach(function(b){b.setAttribute('aria-pressed','false')});this.setAttribute('aria-pressed','true');\"><img loading=\"lazy\" src=\"\/wp-content\/uploads\/2026\/09\/cp-18b-lens-transmittance-tester-uv-blue-light.jpg\" alt=\"\" width=\"1536\" height=\"1024\" loading=\"lazy\" decoding=\"async\"><\/button><button type=\"button\" aria-pressed=\"false\" aria-label=\"Show photo 2\" data-src=\"\/wp-content\/uploads\/2026\/09\/cp-18b-lens-tester-dimensions-170x180x143mm.jpg\" data-alt=\"CP-18B dimensions: 170 \u00d7 180 \u00d7 143 mm\" onclick=\"var g=this.closest('.ev-p-gallery'),m=g.querySelector('.ev-p-main__img img');m.src=this.dataset.src;m.alt=this.dataset.alt;m.removeAttribute('srcset');g.querySelectorAll('.ev-p-thumbs button').forEach(function(b){b.setAttribute('aria-pressed','false')});this.setAttribute('aria-pressed','true');\"><img loading=\"lazy\" src=\"\/wp-content\/uploads\/2026\/09\/cp-18b-lens-tester-dimensions-170x180x143mm.jpg\" alt=\"\" width=\"1254\" height=\"1254\" loading=\"lazy\" decoding=\"async\"><\/button><button type=\"button\" aria-pressed=\"false\" aria-label=\"Show photo 3\" data-src=\"\/wp-content\/uploads\/2026\/09\/cp-18b-lens-tester-functions.jpg\" data-alt=\"CP-18B functions: optical detection head, four transmittance readings, function menu, operation and power buttons, buzzer volume\" onclick=\"var g=this.closest('.ev-p-gallery'),m=g.querySelector('.ev-p-main__img img');m.src=this.dataset.src;m.alt=this.dataset.alt;m.removeAttribute('srcset');g.querySelectorAll('.ev-p-thumbs button').forEach(function(b){b.setAttribute('aria-pressed','false')});this.setAttribute('aria-pressed','true');\"><img loading=\"lazy\" src=\"\/wp-content\/uploads\/2026\/09\/cp-18b-lens-tester-functions.jpg\" alt=\"\" width=\"1402\" height=\"1122\" loading=\"lazy\" decoding=\"async\"><\/button><\/div><\/div><div class=\"ev-p-info\" id=\"ask\"><span class=\"ev-eyebrow\">LENS TRANSMITTANCE TESTER<\/span><h1 class=\"ev-p-h1\">CP-18B <small>Multi-function lens tester for UV, blue and visible light<\/small><\/h1><p class=\"ev-body\">A counter-top tester that measures how much light a lens transmits at four points: violet at 400 nm, blue at 430 nm and 465 nm, and the full visible spectrum from 380 to 760 nm. Readings show on a 4-inch color screen, so customers see what their lens does.<\/p><div class=\"ev-p-facts\"><div><b>400 \/ 430 \/ 465 nm<\/b><span>Test wavelengths<\/span><\/div><div><b>380\u2013760 nm<\/b><span>Visible spectrum<\/span><\/div><div><b>1%<\/b><span>Resolution<\/span><\/div><div><b>4.0&quot; LCD<\/b><span>480 \u00d7 320 color screen<\/span><\/div><\/div><div class=\"ev-p-ctas\"><a class=\"ev-btn\" href=\"\/contact\/?model=CP-18B\">Ask about CP-18B&nbsp;&nbsp;\u2197<\/a><a class=\"ev-btn ev-btn--ghost\" href=\"https:\/\/wa.me\/8618611981496?text=Hello%2C%20I%20would%20like%20information%20about%20the%20CP-18B.\" target=\"_blank\" rel=\"noopener\"><svg width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><path d=\"M20 12a8 8 0 0 1-11.7 7.1L4 20l1-4.1A8 8 0 1 1 20 12z\"\/><\/svg>WhatsApp<\/a><\/div><span class=\"ev-small\" style=\"font-size:13px\">Powered by DC 5 V \/ 2 A input, with an optional built-in lithium battery.<\/span><details class=\"ev-details\"><summary>Delivery, packing and documents<\/summary><div>We confirm the voltage, plug type, packing and shipping method on your quotation, based on your destination. Machines, spare parts and tools can ship together as one order. The commercial invoice and packing list travel with every shipment; ask us for any other documents your import requires.<\/div><\/details><\/div><\/section><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8c38fb2 elementor-widget elementor-widget-html\" data-id=\"8c38fb2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<div class=\"ev\"><div class=\"ev-subnav\"><div class=\"ev-wrap\"><nav aria-label=\"On this page\"><b>CP-18B<\/b><a href=\"#functions\">Functions<\/a><a href=\"#specs\">Specifications<\/a><a href=\"#guide\">Buyer\u2019s guide<\/a><a href=\"#related\">Related models<\/a><a href=\"#faq\">Questions<\/a><\/nav><a class=\"ev-btn ev-btn--sm\" href=\"\/contact\/?model=CP-18B\">Request information&nbsp;&nbsp;\u2197<\/a><\/div><\/div><section class=\"ev-section ev-section--tight\" id=\"functions\"><div class=\"ev-wrap\"><div class=\"ev-stack\"><span class=\"ev-eyebrow\">Functions<\/span><h2 class=\"ev-h2\">What the CP-18B measures<\/h2><\/div><div class=\"ev-fn\"><div><h3>Four readings at once<\/h3><p>Transmittance at 400 nm (violet), 430 nm and 465 nm (blue) and across the visible spectrum.<\/p><\/div><div><h3>1% resolution<\/h3><p>Readings in 1% steps, accurate to \u00b12 on colorless, uniform materials between 0 and 90% transmittance.<\/p><\/div><div><h3>Small samples<\/h3><p>Measures areas down to 1 mm in diameter.<\/p><\/div><div><h3>Color screen<\/h3><p>A 4.0-inch 480 \u00d7 320 color LCD that customers can read across the counter.<\/p><\/div><div><h3>Buttons and touch<\/h3><p>Operated by touch or by two buttons: Operation opens the function menu, and the second button starts a test, recovers and switches the unit on or off.<\/p><\/div><div><h3>Cordless option<\/h3><p>An optional built-in lithium battery frees it from the socket.<\/p><\/div><\/div><\/div><\/section><section class=\"ev-section ev-section--tight\" id=\"details\"><div class=\"ev-wrap\"><div class=\"ev-stack\"><span class=\"ev-eyebrow\">In detail<\/span><h2 class=\"ev-h2\">A closer look at the CP-18B<\/h2><\/div><div class=\"ev-details-grid\"><figure class=\"ev-detail\"><div class=\"ev-detail__img\"><img loading=\"lazy\" src=\"\/wp-content\/uploads\/2026\/09\/cp-18b-lens-tester-functions.jpg\" alt=\"Controls and readings\" width=\"1402\" height=\"1122\" loading=\"lazy\" decoding=\"async\"><\/div><figcaption><h3>Controls and readings<\/h3><p>The optical detection head sits over the lens window. The screen shows live transmittance for visible light, UV400, blue 430 nm and blue 465 nm, with on-screen settings and buzzer volume. Operation opens the function menu; the second button starts a test, recovers, and switches the unit on and off.<\/p><\/figcaption><\/figure><figure class=\"ev-detail\"><div class=\"ev-detail__img\"><img loading=\"lazy\" src=\"\/wp-content\/uploads\/2026\/09\/cp-18b-lens-tester-dimensions-170x180x143mm.jpg\" alt=\"Counter-top size\" width=\"1254\" height=\"1254\" loading=\"lazy\" decoding=\"async\"><\/div><figcaption><h3>Counter-top size<\/h3><p>170 \u00d7 180 mm on the counter and 143 mm high, about 1.5 kg.<\/p><\/figcaption><\/figure><\/div><\/div><\/section><section class=\"ev-section\" id=\"specs\"><div class=\"ev-wrap ev-specs\"><div class=\"ev-specs__head\"><span class=\"ev-eyebrow\">Specifications<\/span><h2 class=\"ev-h2\">CP-18B in figures<\/h2><p class=\"ev-small\">Published specifications. Anything not listed here is confirmed in writing on your quotation, never estimated.<\/p><p class=\"ev-note\">Accuracy is specified for colorless, uniform materials. Readings on tinted, gradient or photochromic lenses are indicative.<\/p><\/div><div class=\"ev-specs__body\"><div class=\"ev-spec-group\"><h3>CP-18B<\/h3><dl class=\"ev-spec\"><div><dt>Wavelengths<\/dt><dd>Violet 400 nm; blue 430 nm; blue 465 nm; visible 380\u2013760 nm<\/dd><\/div><div><dt>Display<\/dt><dd>4.0&quot; 480 \u00d7 320 color LCD<\/dd><\/div><div><dt>Operation<\/dt><dd>Buttons and touch<\/dd><\/div><div><dt>Minimum measurement size<\/dt><dd>\u00d81 mm<\/dd><\/div><div><dt>Resolution<\/dt><dd>1%<\/dd><\/div><div><dt>Measurement accuracy<\/dt><dd>\u00b12 (colorless uniform material, 0\u201390% transmittance)<\/dd><\/div><div><dt>Power input<\/dt><dd>DC 5 V \/ 2 A<\/dd><\/div><div><dt>Dimensions<\/dt><dd>170 \u00d7 180 \u00d7 143 mm<\/dd><\/div><div><dt>Weight<\/dt><dd>approx. 1.5 kg<\/dd><\/div><div><dt>Battery<\/dt><dd>Built-in lithium battery, optional<\/dd><\/div><\/dl><\/div><\/div><\/div><\/section><section class=\"ev-section\" id=\"guide\"><div class=\"ev-wrap\"><div class=\"ev-stack\" style=\"margin-bottom:36px\"><span class=\"ev-eyebrow\">Buyer\u2019s guide<\/span><h2 class=\"ev-h2\">Measuring lenses, and what the numbers mean<\/h2><\/div><div class=\"ev-guide2\"><div class=\"ev-prose\"><h3>How it works<\/h3><p>Counter lens testers fall into two groups. Demonstrators show a customer a difference, for example a photochromic lens darkening under UV. Meters put a number on it: a light source at a known wavelength shines through the lens onto a sensor, and the instrument reports the percentage transmitted. The CP-18B is a meter, reading four points at once.<\/p><p>Quote the wavelength with the number. \u201cUV400\u201d is defined differently by different sources, some at 400 nm and some at 380 nm or 395 nm, and standards for sunglasses use their own limits. A reading at 400 nm is a precise, repeatable statement you can stand behind.<\/p><p>For blue light, describe transmission, not health. A 2023 Cochrane review of 17 trials found blue-light filtering spectacles probably make no short-term difference to eye strain, and the UK College of Optometrists advises practitioners not to promise less fatigue, better sleep or macular protection.<\/p><\/div><div class=\"ev-prose\"><h3>Check before you order<\/h3><ul><li>Whether you need numbers (a meter) or a visual demonstration.<\/li><li>Stated wavelengths, so you can quote them to customers.<\/li><li>Resolution and the conditions accuracy is specified for.<\/li><li>Screen size and readability from the customer\u2019s side of the counter.<\/li><li>Power: mains adapter or battery.<\/li><\/ul><h3>Good practice<\/h3><ol><li>Check the tester on a clear, uncoated lens at the start of the day.<\/li><li>Clean the lens; fingerprints and dust lower the reading.<\/li><li>Place the lens flat over the sensor window, centered.<\/li><li>Read and explain each value: violet, blue and visible transmittance.<\/li><li>Compare two lenses side by side rather than making absolute claims.<\/li><\/ol><h3>Care and maintenance<\/h3><ul><li>Keep the sensor window and light source clean.<\/li><li>Recheck against a known clear lens from time to time.<\/li><li>Charge the optional battery regularly if fitted.<\/li><\/ul><\/div><\/div><p class=\"ev-reading\">Background sources: <a href=\"https:\/\/www.2020mag.com\/article\/demonstrating-lenses\" target=\"_blank\" rel=\"noopener nofollow\">Demonstrating lenses (20\/20 Magazine)<\/a> \u00b7 <a href=\"https:\/\/www.cochranelibrary.com\/cdsr\/doi\/10.1002\/14651858.CD013244.pub2\/full\" target=\"_blank\" rel=\"noopener nofollow\">Blue-light filtering spectacles, Cochrane review 2023<\/a> \u00b7 <a href=\"https:\/\/www.college-optometrists.org\/news\/2023\/september\/review-of-blue-light-filtering-blocking-lenses\" target=\"_blank\" rel=\"noopener nofollow\">College of Optometrists on blue-light filtering lenses (2023)<\/a><\/p><\/div><\/section><section class=\"ev-section\" id=\"related\"><div class=\"ev-wrap\"><div class=\"ev-stack\" style=\"margin-bottom:32px\"><span class=\"ev-eyebrow\">Related models<\/span><h2 class=\"ev-h2\">Often ordered with the CP-18B<\/h2><\/div><div class=\"ev-cards\"><a class=\"ev-card\" href=\"\/products\/cp-18c\/\"><div class=\"ev-card__img\"><img loading=\"lazy\" src=\"\/wp-content\/uploads\/2026\/09\/cp-18c-uv-photochromic-combined-tester.jpg\" alt=\"\" width=\"900\" height=\"900\" loading=\"lazy\" decoding=\"async\"><\/div><div class=\"ev-card__body\"><span class=\"ev-kicker\">Uv &amp; Photochromic Tester<\/span><span class=\"ev-card__title\">CP-18C<\/span><span class=\"ev-card__text\">UV and photochromic lens tester for the counter.<\/span><span class=\"ev-card__more\">View details \u2192<\/span><\/div><\/a><a class=\"ev-card\" href=\"\/products\/hv-600\/\"><div class=\"ev-card__img\"><img loading=\"lazy\" src=\"\/wp-content\/uploads\/2026\/09\/hv-600-auto-lensmeter.jpg\" alt=\"\" width=\"1536\" height=\"1024\" loading=\"lazy\" decoding=\"async\"><\/div><div class=\"ev-card__body\"><span class=\"ev-kicker\">Auto Lensmeter<\/span><span class=\"ev-card__title\">HV-600<\/span><span class=\"ev-card__text\">Auto lensmeter, 7&quot; touch screen, UV and blue-light test.<\/span><span class=\"ev-card__more\">View details \u2192<\/span><\/div><\/a><a class=\"ev-card\" href=\"\/products\/cp-32a1\/\"><div class=\"ev-card__img\"><img loading=\"lazy\" src=\"\/wp-content\/uploads\/2026\/09\/cp-32a1-digital-pd-meter-pupilometer.jpg\" alt=\"\" width=\"1200\" height=\"1200\" loading=\"lazy\" decoding=\"async\"><\/div><div class=\"ev-card__body\"><span class=\"ev-kicker\">Digital Pd Meter<\/span><span class=\"ev-card__title\">CP-32A1<\/span><span class=\"ev-card__text\">Digital PD meter, PD 45\u201382 mm, 8 distances from 30 cm to \u221e.<\/span><span class=\"ev-card__more\">View details \u2192<\/span><\/div><\/a><a class=\"ev-card ev-card--dark\" href=\"\/lens-testers\/\"><span class=\"ev-kicker\">Next read<\/span><span class=\"ev-card__title\">Lens testers: measuring versus demonstrating<\/span><span class=\"ev-card__more\" style=\"color:#fff\">Read more \u2192<\/span><\/a><\/div><\/div><\/section><section class=\"ev-section\" id=\"faq\"><div class=\"ev-wrap ev-faq\"><div style=\"display:flex;flex-direction:column;gap:14px\"><span class=\"ev-eyebrow\">Questions<\/span><h2 class=\"ev-h2\">CP-18B questions<\/h2><\/div><div class=\"ev-faq__list\"><details class=\"ev-faq__q\" open><summary><h3>Does a reading prove a lens is UV400?<\/h3><\/summary><div><p>It gives the transmittance at 400 nm, which is the figure most UV400 claims rest on. Definitions vary between sources and standards, so quote the wavelength and the reading.<\/p><\/div><\/details><details class=\"ev-faq__q\"><summary><h3>Can I tell customers blue-light lenses protect their eyes?<\/h3><\/summary><div><p>We advise against it. Show the transmission figures; clinical evidence for health benefits is weak, and professional bodies warn against such claims.<\/p><\/div><\/details><details class=\"ev-faq__q\"><summary><h3>Does it measure tinted or photochromic lenses?<\/h3><\/summary><div><p>It will give a reading, but the stated accuracy applies to colorless, uniform materials between 0 and 90% transmittance, so treat other readings as indicative.<\/p><\/div><\/details><details class=\"ev-faq__q\"><summary><h3>Does it need a power socket?<\/h3><\/summary><div><p>It runs on a DC 5 V \/ 2 A input, and a built-in lithium battery is available as an option.<\/p><\/div><\/details><\/div><\/div><\/section><section class=\"ev-section ev-section--last\"><div class=\"ev-wrap\"><div class=\"ev-band\"><div><b>Planning a whole bench?<\/b><span class=\"ev-small\">Combine the CP-18B with the machines around it, and we quote them as one order.<\/span><\/div><a class=\"ev-btn\" href=\"\/contact\/\">Discuss your project&nbsp;&nbsp;\u2197<\/a><\/div><\/div><\/section><script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/enochvision.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Equipment\", \"item\": \"https:\/\/enochvision.com\/products\/\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Lens Testers\", \"item\": \"https:\/\/enochvision.com\/lens-testers\/\"}, {\"@type\": \"ListItem\", \"position\": 4, \"name\": \"CP-18B\", \"item\": \"https:\/\/enochvision.com\/products\/cp-18b\/\"}]}<\/script><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Home\/Equipment\/Lens Testers\/CP-18B LENS TRANSMITTANCE TESTERCP-18BLENS TRANSMITTANCE TESTER CP-18B Multi-function lens tester for UV, blue and visible light A counter-top tester that measures how much light a lens transmits at four points: violet at 400 nm, blue at 430 nm and 465 nm, and the full visible spectrum from 380 to 760 nm. Readings show on [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":90,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-157","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/enochvision.com\/es\/wp-json\/wp\/v2\/pages\/157","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/enochvision.com\/es\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/enochvision.com\/es\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/enochvision.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/enochvision.com\/es\/wp-json\/wp\/v2\/comments?post=157"}],"version-history":[{"count":22,"href":"https:\/\/enochvision.com\/es\/wp-json\/wp\/v2\/pages\/157\/revisions"}],"predecessor-version":[{"id":767,"href":"https:\/\/enochvision.com\/es\/wp-json\/wp\/v2\/pages\/157\/revisions\/767"}],"up":[{"embeddable":true,"href":"https:\/\/enochvision.com\/es\/wp-json\/wp\/v2\/pages\/90"}],"wp:attachment":[{"href":"https:\/\/enochvision.com\/es\/wp-json\/wp\/v2\/media?parent=157"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}