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Explore now!\"},{\"name\":\"og:title\",\"label\":\"og:title\",\"content\":\"VenusLab VL Plan Fluor EPI BD – Brightfield and Darkfield Objective Lens\"},{\"name\":\"og:type\",\"label\":\"og:type\",\"content\":\"website\"},{\"name\":\"og:description\",\"label\":\"og描述\",\"content\":\"Dual-mode brightfield/darkfield imaging with Plan Fluor correction & EPI tech—trusted in biological observation, material analysis, and industrial inspection.\"},{\"name\":\"og:image\",\"label\":\"og图片\",\"content\":\"https://source.venuslabtech.com/mall-prod/455dc229-bb2e-4f7a-b2eb-f3a27149d36b.png\"},{\"name\":\"og:url\",\"label\":\"og url\",\"content\":\"https://www.venuslabtech.com/product_center/vl-plan-fluor-epi-bd-brightfield-and-darkfield-observation-objective-lens\"},{\"name\":\"twitter:title\",\"label\":\"twitter:title\",\"content\":\"VenusLab VL Plan Fluor EPI BD – Brightfield and Darkfield Objective Lens\"},{\"name\":\"twitter:description\",\"label\":\"twitter描述\",\"content\":\"Dual-mode brightfield/darkfield imaging with Plan Fluor correction & EPI tech—trusted in biological observation, material analysis, and industrial inspection.\"},{\"name\":\"twitter:image\",\"label\":\"twitter图片\",\"content\":\"https://source.venuslabtech.com/mall-prod/455dc229-bb2e-4f7a-b2eb-f3a27149d36b.png\"},{\"name\":\"twitter:card\",\"label\":\"twitter:card\",\"content\":\"summary_large_image\"},{\"name\":\"twitter:site\",\"label\":\"twitter:site\",\"content\":\"venuslabtech@gmail.com\"}]",[17,21,24],{"id":18,"parentId":19,"name":20},5,0,"Optics & Fiber",{"id":22,"parentId":18,"name":23},34,"Imaging Optics",{"id":10,"parentId":22,"name":25},"Objectives",[27,33],{"id":28,"categoryId":9,"url":29,"urlAlt":30,"sortNum":31,"markJson":32},60,"https://source.venuslabtech.com/mall-prod/116d1649-0cd4-4ae8-9072-b391d4bb2878.jpg","Appearance dimension diagram",2,"",{"id":34,"categoryId":9,"url":35,"urlAlt":36,"sortNum":37,"markJson":32},341,"https://source.venuslabtech.com/mall-prod/886ed12a-8fb3-4c8a-bbe0-0d16524945cf.png","Front view",1,[39],{"id":40,"categoryId":9,"position":37,"templateType":37,"sortNum":37,"details":41,"title":42},45,"{\"editor\":\"\u003Ch2>\u003Cspan style=\\\"font-size: 22px; font-family: Arial;\\\">\u003Cstrong>Introduction:\u003C/strong>\u003C/span>\u003C/h2>\u003Cul>\u003Cli style=\\\"text-align: start;\\\">\u003Cspan style=\\\"color: rgba(0, 0, 0, 0.95); font-size: 19px; font-family: Arial;\\\">45mm Infinite Conjugate Parfocal Industrial Objective Lens\u003C/span>\u003C/li>\u003Cli style=\\\"text-align: start;\\\">\u003Cspan style=\\\"color: rgba(0, 0, 0, 0.95); font-size: 19px; font-family: Arial;\\\">Compatible with coaxial illumination for bright and dark fields\u003C/span>\u003C/li>\u003Cli style=\\\"text-align: start;\\\">\u003Cspan style=\\\"color: rgba(0, 0, 0, 0.95); font-size: 19px; font-family: Arial;\\\">Flat field semi-apochromatic, high imaging contrast\u003C/span>\u003C/li>\u003Cli style=\\\"text-align: start;\\\">\u003Cspan style=\\\"color: rgba(0, 0, 0, 0.95); font-size: 19px; font-family: Arial;\\\">5×-100× series, uniform entrance pupil compatible with DIC observation\u003C/span>\u003C/li>\u003C/ul>\"}","Overview",[44,51,57,64,70],{"id":45,"parentId":9,"name":46,"smallImage":47,"description":48,"modelNumber":49,"introduction":50},10107,"Brightfield And Darkfield Observation Objective Lens","https://source.venuslabtech.com/mall-prod/56264654-2594-4fd0-973c-2d3ae4780f86.png","The bright field shows the overall situation, the dark field captures details, the entire field of view is clear, and it is compatible with all magnifications.","VL Plan Fluor EPI BD 5X","\u003Cp style=\"text-align: start;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">Low magnification with a large field of view + flat field correction, ensuring overall clarity within a 25mm field of view (FN25), and dual bright and dark field modes suitable for thick samples.\u003C/span>\u003C/p>\u003Cp style=\"text-align: start;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">\u003Cbr>\u003C/span>\u003C/p>\u003Cp style=\"text-align: start;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">Applications include:\u003Cbr>Preliminary screening of surface defects on metal sheets, macroscopic observation of 20mm thick bulk samples (such as aluminum blocks), and global positioning of wafers (to avoid lens collisions).\u003C/span>\u003C/p>",{"id":52,"parentId":9,"name":46,"smallImage":53,"description":54,"modelNumber":55,"introduction":56},10108,"https://source.venuslabtech.com/mall-prod/37d733c2-cfbc-4571-a167-0c7384c51114.png","The bright field allows viewing the overall situation, the dark field enables capturing details, with the entire field of view being clear and full magnification adaptation.","VL Plan Fluor EPI BD 10X","\u003Cp style=\"text-align: start;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">Medium magnification balances range and details. The flat-field design eliminates edge blurring. Semi-apochromatic technology restores the true colors of metal grains. Switching between bright and dark fields is efficient.\u003C/span>\u003C/p>\u003Cp style=\"text-align: start;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">\u003Cbr>\u003C/span>\u003C/p>\u003Cp style=\"text-align: start;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">Applications include:\u003Cbr>Analysis of metal grain distribution (bright field), detection of texture defects in chip packaging (dark field), and analysis of crystal orientation (compatible with polarizing modules).\u003C/span>\u003C/p>",{"id":58,"parentId":9,"name":59,"smallImage":60,"description":61,"modelNumber":62,"introduction":63},10109,"Brightfield and Darkfield Observation Objective Lens","https://source.venuslabtech.com/mall-prod/53a78382-650a-45d8-a04e-66c8eae61113.png","The bright field shows the overall situation, the dark field captures details, with clear vision across the entire field of view and adaptation to all magnifications.","VL Plan Fluor EPI BD 20X","\u003Cp style=\"text-align: start;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">High magnification, full field of view with uniform clarity, NA enhancement achieves submicron resolution, no color fringing interference under bright and dark fields, and supports DIC to enhance three-dimensional sense.\u003C/span>\u003C/p>\u003Cp style=\"text-align: start;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">\u003Cbr>\u003C/span>\u003C/p>\u003Cp style=\"text-align: start;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">Applications include:\u003Cbr>Semiconductor chip circuit short circuit / scratch detection (dark field), metal inclusion analysis (bright field), observation of three-dimensional morphology of tiny defects (DIC mode).\u003C/span>\u003C/p>",{"id":65,"parentId":9,"name":46,"smallImage":66,"description":67,"modelNumber":68,"introduction":69},10110,"https://source.venuslabtech.com/mall-prod/4aadf19d-abd9-465b-a982-229389075256.png","The bright field shows the overall situation, the dark field captures details, with a clear full field of view and adaptation to all magnifications.","VL Plan Fluor EPI BD 50X","\u003Cp style=\"text-align: start;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">Near-diffraction-limited resolution, with flat-field correction ensuring clarity across the entire 1mm field of view (FN25÷50), and accurate color reproduction of microstructures.\u003C/span>\u003C/p>\u003Cp style=\"text-align: start;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">\u003Cbr>\u003C/span>\u003C/p>\u003Cp style=\"text-align: start;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">Applications include:\u003Cbr>Metallographic structure analysis (distinction between martensite/austenite), localization of nanoscale defects in wafers (abnormal oxide layers), and thin-film pinhole detection (dark field).\u003C/span>\u003C/p>",{"id":71,"parentId":9,"name":59,"smallImage":72,"description":73,"modelNumber":74,"introduction":75},10111,"https://source.venuslabtech.com/mall-prod/e82846aa-cf8a-45e8-a037-8734ae49e28d.png","The bright field allows viewing the overall situation, the dark field enables capturing details, with clear vision across the entire field of view and adaptation to all magnifications.","VL Plan Fluor EPI BD 100X","\u003Cp style=\"text-align: start;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">High-power extreme resolution (close to the diffraction limit), flat-field design to offset field curvature, semi-apochromatic to ensure color accuracy, and 45mm parfocal length for operational safety.\u003C/span>\u003C/p>\u003Cp style=\"text-align: start;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">\u003Cbr>\u003C/span>\u003C/p>\u003Cp style=\"text-align: start;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">Applications include:\u003Cbr>Detection of nanodefects in semiconductor chips (circuit gaps, nanoscratches), microscopic observation of ultra-precision materials (graphene), and high-power dark-field particle analysis.\u003Cbr>\u003C/span>\u003C/p>",[],{"code":4,"msg":5,"data":78},[79,88,102,129,139,153,163],{"id":31,"parentId":19,"name":80,"sortNum":37,"smallImage":81,"smallImageAlt":81,"introduction":82,"children":83,"elect":19,"childrenFlag":37},"Light Sources","https://source.venuslabtech.com/mall-prod/0513a35b-c34f-4a0b-9a7d-d2e627c17713.png","\u003Cp>\u003Cspan style=\"font-size: 19px; font-family: Arial;\">At VenusLab, our Light Sources portfolio is designed to meet the diverse needs of modern research and industry. From multi-channel LED modules to high-stability laser engines, each solution delivers precision, stability, and adaptability for your specific applications. Whether for advanced imaging, optogenetics, or fiber-coupled systems, VenusLab light sources ensure consistent performance to drive your innovation forward.\u003C/span>\u003C/p>",[84],{"id":12,"parentId":31,"name":85,"sortNum":31,"smallImage":86,"smallImageAlt":86,"introduction":87,"elect":19,"childrenFlag":37},"Laser","https://source.venuslabtech.com/mall-prod/e90dbc77-1a1b-4c2f-b6ab-2b8aba78233c.png","\u003Cp>\u003Cbr>\u003C/p>",{"id":89,"parentId":19,"name":90,"sortNum":31,"smallImage":91,"smallImageAlt":91,"introduction":92,"children":93,"elect":19,"childrenFlag":37},3,"Detectors","https://source.venuslabtech.com/mall-prod/635fa0d9-5f9f-4575-8fbf-70d07d4a0fcf.png","\u003Cp>\u003Cspan style=\"font-size: 19px; font-family: Arial;\">The VenusLab detector product series is core-positioned around the concept of \"full-wavelength coverage, full-scenario adaptation, and high-precision output\". It builds a complete product matrix spanning from basic optical signal monitoring to single-photon-level ultra-high-precision detection through 6 major segmented categories. Covering the full wavelength range from ultraviolet (185nm) to short-wave infrared (2500nm), with response speeds ranging from 50ns down to 1ns and detection sensitivity spanning from 0.1nW to the single-photon level, this series can meet the differentiated optical signal detection needs across multiple fields such as scientific research, industry, biomedicine, and security. It provides stable and accurate core sensing components for various light-related applications.\u003C/span>\u003C/p>\u003Cp>\u003Cbr>\u003C/p>",[94,98],{"id":95,"parentId":89,"name":96,"sortNum":37,"smallImage":97,"smallImageAlt":97,"introduction":87,"elect":19,"childrenFlag":37},18,"Photodetector","https://source.venuslabtech.com/mall-prod/33fb14c5-d255-496c-b822-a0b81ee1a6ba.png",{"id":99,"parentId":89,"name":100,"sortNum":31,"smallImage":101,"smallImageAlt":101,"introduction":87,"elect":19,"childrenFlag":37},19,"Photodiodes","https://source.venuslabtech.com/mall-prod/15133790-2487-4ce3-bc77-372db6368e9b.png",{"id":103,"parentId":19,"name":104,"sortNum":89,"smallImage":105,"smallImageAlt":105,"introduction":106,"children":107,"elect":19,"childrenFlag":37},4,"Imaging","https://source.venuslabtech.com/mall-prod/02082dd8-575f-4441-8e63-81a43853d93c.png","\u003Cp style=\"line-height: 1.5;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">Centered on the core concept of \"Precise Capture + Ecological Synergy\", the VenusLab imaging product series covers the entire imaging wavelength range from ultraviolet (200nm) to short-wave infrared (2500nm). It builds a complete product matrix that spans from microscopic imaging to weak light signal visualization through 4 major segmented product categories.\u003C/span>\u003C/p>\u003Cp style=\"line-height: 1.5;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">The series can seamlessly interface with its detectors (such as single-photon counting modules and InGaAs detectors) and optical equipment, while boasting the combined characteristics of high resolution (up to 20 million pixels), high frame rate (up to 120fps), and low noise (dark current ≤ 1e-12 A). It meets the integrated needs of \"imaging - analysis - recording\" in fields including scientific research, industry, and biomedicine.\u003C/span>\u003C/p>",[108,112,116,120,125],{"id":109,"parentId":103,"name":110,"sortNum":37,"smallImage":111,"smallImageAlt":111,"introduction":87,"elect":19,"childrenFlag":37},24,"Scientific Cameras","https://source.venuslabtech.com/mall-prod/a53af2a6-2e06-4a58-936b-03479dda5ca0.png",{"id":113,"parentId":103,"name":114,"sortNum":31,"smallImage":115,"smallImageAlt":115,"introduction":87,"elect":19,"childrenFlag":37},25,"CMOS Cameras","https://source.venuslabtech.com/mall-prod/89dbbff2-301e-4dd6-a1a6-3196ea189a86.png",{"id":117,"parentId":103,"name":118,"sortNum":89,"smallImage":119,"smallImageAlt":119,"introduction":87,"elect":19,"childrenFlag":37},26,"CCD Cameras","https://source.venuslabtech.com/mall-prod/4362a829-8e2d-46a7-96c1-4c8ee45a6d15.png",{"id":121,"parentId":103,"name":122,"sortNum":123,"smallImage":124,"smallImageAlt":124,"introduction":87,"elect":19,"childrenFlag":37},32,"HDMI Cameras",9,"https://source.venuslabtech.com/mall-prod/4f44eb5c-8319-48da-b669-f3c4dbbcb13a.png",{"id":126,"parentId":103,"name":127,"sortNum":12,"smallImage":128,"smallImageAlt":128,"introduction":87,"elect":19,"childrenFlag":37},33,"Microscope Cameras","https://source.venuslabtech.com/mall-prod/d8690bc7-4af2-42a6-b02b-1cf084b52eb5.png",{"id":18,"parentId":19,"name":20,"sortNum":103,"smallImage":130,"smallImageAlt":130,"introduction":131,"children":132,"elect":19,"childrenFlag":37},"https://source.venuslabtech.com/mall-prod/af136da6-6853-426d-8a86-5adc2985f50b.png","\u003Cp style=\"line-height: 1.5;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">VenusLab's optical and fiber optic component products focus on high-precision optical signal regulation and transmission. 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They provide precision mechanical control capabilities ranging from the micrometer to nanometer scale for the scientific research and industrial fields.\u003C/span>\u003C/p>",[145,149],{"id":146,"parentId":140,"name":147,"sortNum":18,"smallImage":148,"smallImageAlt":148,"introduction":87,"elect":19,"childrenFlag":37},62,"Optical Tables","https://source.venuslabtech.com/mall-prod/1016b0a2-f58c-42c5-8e30-2c2f70e9c4c4.png",{"id":150,"parentId":140,"name":151,"sortNum":140,"smallImage":152,"smallImageAlt":152,"introduction":87,"elect":19,"childrenFlag":37},63,"Temperature Stage","https://source.venuslabtech.com/mall-prod/9710b50f-7653-4488-a541-811f4d9b889c.png",{"id":154,"parentId":19,"name":155,"sortNum":140,"smallImage":156,"smallImageAlt":156,"introduction":157,"children":158,"elect":19,"childrenFlag":37},7,"Optical Test & Metrology","https://source.venuslabtech.com/mall-prod/88a64fab-6c58-416d-8630-cea8401c3ecb.png","\u003Cp style=\"line-height: 1.5;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">VenusLab's optical measurement and characterization products are centered on the core of \"Full Parameter Coverage, Extreme Environment Adaptability, and Intelligent Analysis\".They cover four major categories: spectral measurement, power and energy measurement, beam analysis, and infrared temperature measurement and imaging.Together with the company's in-house optomechanical products, these products form a closed-loop solution for \"Precision Regulation - Accurate Measurement\".\u003C/span>\u003C/p>",[159],{"id":160,"parentId":154,"name":161,"sortNum":37,"smallImage":162,"smallImageAlt":162,"introduction":87,"elect":19,"childrenFlag":37},69,"Spectral Measurement","https://source.venuslabtech.com/mall-prod/db8d8151-da44-436e-834a-28644b643784.png",{"id":164,"parentId":19,"name":165,"sortNum":154,"smallImage":166,"smallImageAlt":166,"introduction":167,"children":168,"elect":19,"childrenFlag":37},8,"Systems & Applications","https://source.venuslabtech.com/mall-prod/151843f8-ac03-4d88-a343-c0fbd70e75d1.png","\u003Cp style=\"line-height: 1.5;\">\u003Cspan style=\"font-size: 19px; font-family: Arial;\">Centered on \"Basic Observation - High-Resolution Analysis\", VenusLab offers brightfield/fluorescence microscopy for routine high-efficiency imaging, and confocal/Raman microscopy focusing on ultra-high resolution and molecular spectroscopy integration. Sharing modules and unified interfaces for flexible switching, they provide one-stop solutions for \"morphology observation - composition - structural analysis\" in biomedicine and materials science.\u003C/span>\u003C/p>",[169,174],{"id":170,"parentId":164,"name":171,"sortNum":31,"smallImage":172,"smallImageAlt":172,"introduction":173,"elect":19,"childrenFlag":37},85,"Confocal/Raman Microscopy","https://source.venuslabtech.com/mall-prod/dbf92573-535b-4fcb-b200-b90f31ae2d3b.png","\u003Cp style=\"line-height: 1.5;\">\u003Cspan style=\"color: rgba(0, 0, 0, 0.85); font-size: 19px; font-family: Arial;\">The Confocal/Raman Microscopy System is a product of in-depth integration of confocal microscopic imaging technology and Raman spectroscopy technology. 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