{"product_id":"nikon-cfi-p-achro-40x-strain-free-polarized-light-objective","title":"Nikon CFI P Achro 40X Strain Free Polarized Light Objective","description":"\u003cp\u003e\u003cstrong\u003eNikon CFI P Achro 40X Strain-Free Polarized Light Objective (MRP50402)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAchieve accurate, artifact-free polarized light microscopy at 40x with the Nikon CFI P Achro 40X Strain-Free Objective. Engineered with specially selected, stress-free optical glass, this objective eliminates the birefringence artifacts introduced by internal lens strain — ensuring that only the specimen's true optical properties are observed under crossed polarizers.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e🔧 Product Description\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe CFI P Achro 40X is a strain-free (\"P\" designation) achromat objective designed specifically for polarized light microscopy on Nikon CFI infinity-corrected upright microscopes. Standard objectives contain residual stress in their optical elements that introduces unwanted birefringence, which can obscure or distort the specimen's true polarization signal. The P Achro series uses carefully selected, strain-free glass and mounting techniques to minimize this background birefringence to negligible levels, providing a dark, clean extinction field under crossed polarizers. At 40x, it delivers the magnification needed for detailed examination of crystalline structures, mineral thin sections, polymers, and birefringent biological tissues. Achromat correction provides good color and contrast performance for routine polarized light work.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e🔎 Typical Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePolarized light microscopy of minerals, crystals, and geological thin sections\u003c\/li\u003e\n\u003cli\u003eBirefringence analysis of polymers, fibers, and composite materials\u003c\/li\u003e\n\u003cli\u003ePathology and histology: collagen, muscle fiber, bone, and amyloid detection\u003c\/li\u003e\n\u003cli\u003ePharmaceutical analysis: crystalline drug substance characterization\u003c\/li\u003e\n\u003cli\u003eMaterials science: stress and orientation analysis in anisotropic materials\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e📊 Key Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification\u003c\/td\u003e\n\u003ctd\u003e40x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Correction\u003c\/td\u003e\n\u003ctd\u003eAchromat (\"P\" strain-free designation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStrain-Free\u003c\/td\u003e\n\u003ctd\u003eYes — minimized internal birefringence for clean extinction under crossed polarizers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMicroscope Type\u003c\/td\u003e\n\u003ctd\u003eCFI infinity-corrected upright\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eMRP50402\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCondition\u003c\/td\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cem\u003eUniversity and institutional purchase orders are welcome. Please contact us for net terms and volume pricing.\u003c\/em\u003e\u003c\/p\u003e","brand":"Spach Optics, Inc.","offers":[{"title":"Default Title","offer_id":52247390585133,"sku":"MRP50402","price":745.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/7965\/8029\/files\/SHOP_40X_POL2_7234612a-83af-46d4-bbd2-bb0e32ba1469.jpg?v=1784507750","url":"https:\/\/www.spachoptics.com\/products\/nikon-cfi-p-achro-40x-strain-free-polarized-light-objective","provider":"Spach Optics, Inc.","version":"1.0","type":"link"}