{"product_id":"mitutoyo-50x-m-plan-apo-nir-objective-378-825-16","title":"Mitutoyo M Plan Apo NIR 50x Objective (NA 0.42, WD 17mm, 480–1800nm, M26)","description":"\u003cp style=\"font-family: 'Segoe UI Emoji', sans-serif; color: rgb(0,0,0);\"\u003eThe \u003cstrong\u003eMitutoyo M Plan Apo NIR 50× Objective\u003c\/strong\u003e is a near-infrared and short-wave infrared (SWIR) optimized plan apochromat objective from Mitutoyo’s M Plan Apo NIR series — delivering 50× magnification with an exceptional 17mm working distance and optimized transmission across an extraordinary 480–1800nm spectral range spanning the full visible, NIR, and SWIR spectrum. Compared to the high-resolution 50× NIR version (NA 0.65, WD 10mm), this version trades some NA for a longer 17mm working distance — the preferred choice when maximum specimen clearance is the priority over maximum resolution.\u003c\/p\u003e\n\n\u003cul style=\"font-family: 'Segoe UI Emoji', sans-serif; color: rgb(0,0,0);\"\u003e \n\u003cli\u003e🔦 \u003cstrong\u003eExceptional spectral range: 480–1800nm (visible + NIR + SWIR)\u003c\/strong\u003e — transmission extending to 1800nm covers the full NIR and into the SWIR, enabling silicon wafer through-inspection, InGaAs camera imaging, SWIR fluorescence, and Raman spectroscopy with long-wavelength excitation lasers (1064nm, 1550nm) well beyond the range of standard NIR objectives (~1000nm)\u003c\/li\u003e\n\u003cli\u003e📏 \u003cstrong\u003eSuper long working distance: 17mm\u003c\/strong\u003e — exceptional clearance for a 50× objective, providing ample room for specimens in environmental chambers, cryostats, vacuum systems, and laser processing setups, as well as clearance for beam delivery optics and collection systems\u003c\/li\u003e\n\u003cli\u003e🔬 \u003cstrong\u003eNA 0.42, 0.7µm resolving power\u003c\/strong\u003e — practical numerical aperture for a long working distance NIR\/SWIR objective at 50×, delivering sub-micron resolution for semiconductor inspection, Raman mapping, and NIR\/SWIR imaging with maximum working clearance\u003c\/li\u003e\n\u003cli\u003e🌟 \u003cstrong\u003ePlan apochromat (M Plan Apo) correction\u003c\/strong\u003e — Mitutoyo’s highest level of chromatic and spherical aberration correction for accurate, flat-field imaging across the full 480–1800nm spectral range\u003c\/li\u003e\n\u003cli\u003e♾️ \u003cstrong\u003eInfinity-corrected, M26 thread\u003c\/strong\u003e — compatible with Mitutoyo FS series microscopes and other infinity-corrected systems with M26 nosepieces\u003c\/li\u003e\n\u003cli\u003e🇯🇵 \u003cstrong\u003eMitutoyo quality, made in Japan\u003c\/strong\u003e — precision optical construction for consistent, high-efficiency NIR\/SWIR transmission and long service life\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eCatalog number 378-825-17\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003cp style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003e\u003cstrong\u003e🔧 Product Description\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"font-family: 'Segoe UI Emoji', sans-serif; color: rgb(0,0,0);\"\u003eThe Mitutoyo M Plan Apo NIR 50× (378-825-17) is the long working distance variant of the M Plan Apo NIR 50× series — offering a 17mm working distance at the cost of some NA (0.42 vs. 0.65 for the high-resolution version 378-863-5), making it the preferred choice for applications where specimen clearance is the primary constraint. The 17mm working distance provides practical clearance for the full range of semiconductor inspection fixtures, environmental chambers, cryostats, vacuum systems, and laser processing setups where the 10mm WD of the high-resolution version may be insufficient. The 480–1800nm spectral range is identical to the high-resolution version, enabling the same SWIR applications: through-silicon wafer inspection, InGaAs camera imaging, SWIR fluorescence, and Raman spectroscopy with long-wavelength excitation lasers. At 50× with 0.7µm resolving power, this objective delivers sub-micron resolution for detailed semiconductor inspection and Raman mapping with the added benefit of 17mm working clearance. The plan apochromat correction ensures flat-field imaging with accurate chromatic registration across the full 480–1800nm spectral range. Compatible with Mitutoyo FS series microscopes and other infinity-corrected systems with M26 thread nosepieces. Catalog number 378-825-17.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003cp style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003e\u003cstrong\u003e🔎 Typical Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"font-family: 'Segoe UI Emoji', sans-serif; color: rgb(0,0,0);\"\u003e \n\u003cli\u003eSilicon wafer backside and through-silicon inspection at 50× requiring maximum working clearance\u003c\/li\u003e\n\u003cli\u003eInGaAs camera imaging requiring SWIR transmission to 1800nm at 50×\u003c\/li\u003e\n\u003cli\u003eRaman spectroscopy mapping with NIR and SWIR excitation lasers at 50×\u003c\/li\u003e\n\u003cli\u003eNIR\/SWIR imaging in environmental chambers, cryostats, or vacuum systems requiring 17mm clearance\u003c\/li\u003e\n\u003cli\u003eNIR\/SWIR laser processing and beam characterization at 50× with extended working distance\u003c\/li\u003e\n\u003cli\u003eAny 50× NIR\/SWIR application where working distance is the priority over maximum NA\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003cp style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003e\u003cstrong\u003e📊 Key Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%; border-collapse: collapse; font-family: 'Segoe UI Emoji', sans-serif; color: rgb(0,0,0);\"\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"text-align:left; padding: 6px; border: 1px solid #ddd;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"text-align:left; padding: 6px; border: 1px solid #ddd;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eCatalog Number\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e378-825-17\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eMagnification\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e50×\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eNumerical Aperture (NA)\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e0.42\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eImmersion Medium\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eDry (air)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eWorking Distance\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e17.0mm (Super Long Working Distance)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eSpectral Range\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e480–1800nm (Visible + NIR + SWIR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eResolving Power\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e0.7µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eFocal Depth\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e1.6µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eField of View (Ø24 eyepiece)\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eØ0.48mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eReal FOV (1\/2\" chip camera)\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e0.10 × 0.13mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eM Plan Apo NIR (Plan Apochromat, NIR\/SWIR-optimized)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eCorrection\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eInfinity-corrected (brightfield)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eThread \/ Mount\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eM26\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eCompatible Systems\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eMitutoyo FS series; other infinity-corrected M26 systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eSKU\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e378-825-17\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003cp style=\"font-family: 'Segoe UI Emoji', sans-serif; color: rgb(0,0,0);\"\u003e\u003cem\u003eUniversity and institutional purchase orders are welcome. Please contact us for invoicing and procurement documentation.\u003c\/em\u003e\u003c\/p\u003e","brand":"Spach Optics, Inc.","offers":[{"title":"Default Title","offer_id":51695316074797,"sku":"378-825-17","price":4100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/7965\/8029\/files\/378-825-17.jpg?v=1776623313","url":"https:\/\/www.spachoptics.com\/products\/mitutoyo-50x-m-plan-apo-nir-objective-378-825-16","provider":"Spach Optics, Inc.","version":"1.0","type":"link"}