{"product_id":"mitutoyo-378-402-wli-plan-apo-25x-mirau-type","title":"Mitutoyo 378-402 WLI Plan Apo 25x Mirau Type","description":"\u003cp\u003eThe WLI Plan Apo 25X is a precision plan apochromat objective designed specifically for white light interferometry (WLI) applications. Developed to match the WLI Unit, this objective integrates key interferometric components directly within the lens body, enabling compact and highly stable measurement systems.\u003c\/p\u003e\n\u003cp\u003eIts design incorporates an internal beam splitter and reference mirror, allowing accurate interferometric measurement without the need for external optical components. An integrated interference fringe adjustment mechanism is provided as standard, enabling precise alignment and optimisation during measurement.\u003c\/p\u003e\n\u003cp\u003eWith a high numerical aperture of 0.50, the WLI Plan Apo 25X delivers excellent resolution and measurement accuracy. The compact design, combined with a parfocal distance of 60 mm, ensures a lighter and more space-efficient setup while maintaining a 3.6 mm working distance.\u003c\/p\u003e\n\u003cp\u003eOptimised for visible light interferometry, this objective is ideal for surface profiling, precision metrology, and high-resolution topography measurement.\u003c\/p\u003e\n\u003cp\u003eKey Features\u003c\/p\u003e\n\u003cp\u003eDesigned specifically for white light interferometry (WLI)\u003c\/p\u003e\n\u003cp\u003eBeam splitter and reference mirror integrated inside the objective\u003c\/p\u003e\n\u003cp\u003eInterference fringe adjustment mechanism included as standard\u003c\/p\u003e\n\u003cp\u003eHigh numerical aperture (0.50) for improved resolution\u003c\/p\u003e\n\u003cp\u003eCompact and lightweight design\u003c\/p\u003e\n\u003cp\u003eParfocal distance: 60 mm for compact system integration\u003c\/p\u003e\n\u003cp\u003eHigh-quality Plan Apochromat optical design\u003c\/p\u003e\n\u003cp\u003eInfinity corrected\u003c\/p\u003e\n\u003cp\u003eSpecifications\u003c\/p\u003e\n\u003cp\u003eModel: WLI Plan Apo 25X\u003c\/p\u003e\n\u003cp\u003eMagnification: 25x\u003c\/p\u003e\n\u003cp\u003eWorking distance: 3.6 mm\u003c\/p\u003e\n\u003cp\u003eNumerical Aperture (N.A.): 0.50\u003c\/p\u003e\n\u003cp\u003eResolving power: 0.55 µm\u003c\/p\u003e\n\u003cp\u003eFocal length (f): 4 mm\u003c\/p\u003e\n\u003cp\u003eParfocal distance (P.D.): 60 mm\u003c\/p\u003e\n\u003cp\u003eApplicable tube lens focal length: 100 mm\u003c\/p\u003e\n\u003cp\u003eField of view (2\/3\" camera): 0.26 × 0.35 mm\u003c\/p\u003e\n\u003cp\u003eField of view (WLI Unit): 0.29 × 0.22 mm\u003c\/p\u003e\n\u003cp\u003eObservation mode: Interferometer\u003c\/p\u003e\n\u003cp\u003eGlass compensation: No\u003c\/p\u003e\n\u003cp\u003eLaser applications: No\u003c\/p\u003e\n\u003cp\u003eSpectral range: Visible (VIS)\u003c\/p\u003e\n\u003cp\u003eMount: RMS (20.32 mm × 36 TP)\u003c\/p\u003e\n\u003cp\u003eOuter diameter: 40 mm\u003c\/p\u003e\n\u003cp\u003eMirror tube length (excluding mounting screws): 57 mm\u003c\/p\u003e\n\u003cp\u003eMass: 290 g\u003c\/p\u003e","brand":"Mitutoyo","offers":[{"title":"Default Title","offer_id":56437813051772,"sku":"378-402","price":3690.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/9428\/5114\/files\/Mitutoyo_378-402_WLI_Plan_Apo_25x_Mirau_Type.jpg?v=1772649676","url":"https:\/\/www.hroberts-di.com\/products\/mitutoyo-378-402-wli-plan-apo-25x-mirau-type","provider":"H Roberts \u0026 Sons","version":"1.0","type":"link"}