{"title":"Microscope Eyepiece Reticules (Graticules)","description":"\u003ch1\u003eMicroscope Eyepiece Reticules \u0026amp; Graticules\u003c\/h1\u003e\n\u003cp\u003eBrowse our range of high-quality microscope eyepiece reticules and graticules, designed for accurate measurement, counting, alignment, and calibration in scientific, industrial, educational, and laboratory applications.\u003c\/p\u003e\n\u003cp\u003eCompatible with a wide range of microscope eyepieces, our reticules are manufactured on precision optical glass using durable chrome-etched patterns for exceptional clarity and accuracy.\u003c\/p\u003e\n\u003ch2\u003eWhat is an Eyepiece Reticule?\u003c\/h2\u003e\n\u003cp\u003eAn eyepiece reticule (also known as a graticule or reticle) is a precision glass disc fitted inside a microscope eyepiece. The engraved pattern is superimposed onto the specimen image, allowing users to measure, count, compare, align, or analyse samples directly through the microscope.\u003c\/p\u003e\n\u003ch2\u003eAvailable Reticule Patterns\u003c\/h2\u003e\n\u003cp\u003eWe offer a comprehensive range of standard microscope reticules, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eLinear scales and measuring gauges\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCrosshairs and alignment patterns\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCounting grids and reference grids\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eParticle sizing reticules\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWalton \u0026amp; Beckett asbestos counting reticules\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProtractors and angle measurement scales\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStereology patterns\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSpecialist application-specific reticules\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhether you require routine dimensional measurements or a specialised analytical pattern, we have a solution to suit your application.\u003c\/p\u003e\n\u003ch2\u003ePrecision Manufactured\u003c\/h2\u003e\n\u003cp\u003eAll reticules are produced on 1.5 mm thick optical glass using a vacuum-deposited chrome process, ensuring excellent durability, contrast, and long-term performance. A range of standard diameters is available to suit most microscope eyepieces, with custom sizes available upon request.\u003c\/p\u003e\n\u003ch2\u003eChoosing the Correct Reticule\u003c\/h2\u003e\n\u003cp\u003eWhen selecting a reticule, two factors are important:\u003c\/p\u003e\n\u003ch3\u003e1. Pattern Type\u003c\/h3\u003e\n\u003cp\u003eThe application determines the pattern required. For example:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eGeneral measurements – Linear scale reticules\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eParticle analysis – Sizing and counting reticules\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAsbestos analysis – Walton \u0026amp; Beckett reticules\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAlignment tasks – Crosshair reticules\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e2. Reticule Diameter\u003c\/h3\u003e\n\u003cp\u003eThe reticule diameter must match the internal reticule holder within your microscope eyepiece. Most modern eyepieces incorporate a dedicated reticule seat or retaining ring to hold the reticule at the optical focal plane.\u003c\/p\u003e\n\u003cp\u003eIf you are unsure which size you require, our team can help identify the correct diameter for your microscope.\u003c\/p\u003e\n\u003ch2\u003eUnderstanding Scale Magnification\u003c\/h2\u003e\n\u003cp\u003eA common misconception is that the engraved scale represents the actual specimen size. In practice, the apparent measurement depends on the microscope objective being used.\u003c\/p\u003e\n\u003cp\u003eFor example:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eA 10 mm reticule scale viewed through a 10x objective represents 1 mm on the specimen.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe same scale viewed through a 40x objective represents 0.25 mm on the specimen.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor accurate measurements, all reticules should be calibrated using a stage micrometer at the magnifications you intend to use.\u003c\/p\u003e\n\u003ch2\u003eCustom Reticules Available\u003c\/h2\u003e\n\u003cp\u003eNeed a bespoke pattern? We offer a cost-effective custom reticule manufacturing service capable of producing unique scales, grids, counting patterns, and specialist designs tailored to your specific application.\u003c\/p\u003e\n\u003cp\u003eIf you need assistance selecting the correct reticule pattern or diameter, contact our team for expert advice.\u003c\/p\u003e","products":[{"product_id":"microscope-eyepiece-reticules-graticules-ne1-horizontal-scale-10mm-0-1mm","title":"Microscope Eyepiece Reticules (Graticules) NE1 Horizontal Scale 10mm\/0.1mm","description":"\u003ch1\u003eMicroscope Eyepiece Reticules (Graticules) NE1 Horizontal Scale 10mm\/0.1mm\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEyepiece Reticle with 10mm Horizontal Micrometer Scale subdivided into 100 divisions of 0.1mm (100µm)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan 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Tolerance\u003c\/span\u003e\u003cbr\u003e+\/-0.005mm\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text-primary\"\u003eDiameter Tolerance\u003c\/span\u003e\u003cbr\u003e+0\/-0.1mm\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text-primary\"\u003eDivisional Marker Lengths\u003c\/span\u003e\u003cbr\u003e0.865mm, 0.610mm, 0.425mm\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text-primary\"\u003eOrientation\u003c\/span\u003e\u003cbr\u003eCorrect reading through glass\u003c\/p\u003e","brand":"Auckland 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Eyepiece Reticules (Graticules) NG1 Patterson Globes and Circles","description":"\u003ch1\u003eMicroscope Eyepiece Reticules (Graticules) \u003c\/h1\u003e\n\u003ch1 class=\"text-secondary\"\u003eNG1 Patterson Globes and Circles\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEyepiece Reticle with central Rectangle and Globes\/Circles for particle sizing and counting\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specification\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe reticle pattern consists of a central rectangle, subdivided into 9 smaller rectangles with a number of circles and dots (globes) along the top and bottom edges. 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Rectangle size is nominally 4.5mm x 2.025mm and circle\/dot sizes in microns are nominally 450, 360, 270, 225,180, 145, 110, 74, 37 and 18.\u003cbr\u003e\u003cbr\u003eReference: H.S.Patterson and W.Cawood.Transactions of the Faraday Society, Vol. 32 Feb 1936.“The Determination of Size Distribution in Smokes.” Pp. 1084-1088.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text-primary\"\u003eGlass Type and Thickness\u003c\/span\u003e\u003cbr\u003eSoda Lime 1.5mm thick\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text-primary\"\u003eDiameter Tolerance\u003c\/span\u003e\u003cbr\u003e+0\/-0.1mm\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text-primary\"\u003eOrientation\u003c\/span\u003e\u003cbr\u003eCorrect reading through glass\u003c\/p\u003e","brand":"Auckland Scientific","offers":[{"title":"16mm","offer_id":58332713910597,"sku":"01B16250","price":138.93,"currency_code":"GBP","in_stock":true},{"title":"19mm","offer_id":58332713943365,"sku":"01B19250","price":138.93,"currency_code":"GBP","in_stock":true},{"title":"20.4mm","offer_id":58332713976133,"sku":"01B20.4250","price":138.93,"currency_code":"GBP","in_stock":true},{"title":"21mm","offer_id":58332714008901,"sku":"01B21250","price":138.93,"currency_code":"GBP","in_stock":true},{"title":"23mm","offer_id":58332714041669,"sku":"01B23250","price":138.93,"currency_code":"GBP","in_stock":true},{"title":"24mm","offer_id":58332714074437,"sku":"01B24250","price":162.96,"currency_code":"GBP","in_stock":true},{"title":"24.5mm","offer_id":58332714107205,"sku":"01B24.5250","price":162.96,"currency_code":"GBP","in_stock":true},{"title":"25mm","offer_id":58332714139973,"sku":"01B25250","price":162.96,"currency_code":"GBP","in_stock":true},{"title":"26mm","offer_id":58332714172741,"sku":"01B26250","price":162.96,"currency_code":"GBP","in_stock":true},{"title":"27mm","offer_id":58332714205509,"sku":"01B27250","price":162.96,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1066\/1930\/6309\/files\/ng1.jpg?v=1782073881"},{"product_id":"microscope-eyepiece-reticules-graticules-ng5-fairs","title":"Microscope Eyepiece Reticules (Graticules) NG5 Fairs","description":"\u003ch1\u003eMicroscope Eyepiece Reticules (Graticules) \u003c\/h1\u003e\n\u003ch1 class=\"text-secondary\"\u003eNG5 Fairs\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEyepiece Reticle designed to extend the sizing range of the Globes\/Circles reticles\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specification\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned to extend the sizing range of globe and circle reticles. Example: Used in conjunction with NG2 the overall size range = 128:1. The circles increase by root 2. Note that both reticles would have to be used with the same microscope, eyepiece and objective. Reference: G.L Fairs Chem Ind. 1943 Vol. 62. 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These divisions are numbered for convenience. Rectangle size is 4.5mm x 2.025mm. The specimen is racked on the mechanical stage of the microscope and traverses are taken right across the deposit sizing all the particles encountered.\u003cbr\u003e\u003cbr\u003eReference: K.R.May, Journal of Scientific Instruments Vol. 22 Oct 1945. “The Cascade Impactor.” An instrument for sampling coarse aerosols.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text-primary\"\u003eGlass Type and Thickness\u003c\/span\u003e\u003cbr\u003eSoda Lime 1.5mm thick\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text-primary\"\u003eDiameter Tolerance\u003c\/span\u003e\u003cbr\u003e+0\/-0.1mm\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text-primary\"\u003eOrientation\u003c\/span\u003e\u003cbr\u003eCorrect reading through glass\u003c\/p\u003e","brand":"Auckland Scientific","offers":[{"title":"16mm","offer_id":58332895215941,"sku":"01B16251","price":138.93,"currency_code":"GBP","in_stock":true},{"title":"19mm","offer_id":58332895248709,"sku":"01B19251","price":138.93,"currency_code":"GBP","in_stock":true},{"title":"20.4mm","offer_id":58332895281477,"sku":"01B20.4251","price":138.93,"currency_code":"GBP","in_stock":true},{"title":"21mm","offer_id":58332895314245,"sku":"01B21251","price":138.93,"currency_code":"GBP","in_stock":true},{"title":"23mm","offer_id":58332895347013,"sku":"01B23251","price":138.93,"currency_code":"GBP","in_stock":true},{"title":"24mm","offer_id":58332895379781,"sku":"01B24251","price":162.96,"currency_code":"GBP","in_stock":true},{"title":"24.5mm","offer_id":58332895412549,"sku":"01B24.5251","price":162.96,"currency_code":"GBP","in_stock":true},{"title":"25mm","offer_id":58332895445317,"sku":"01B25251","price":162.96,"currency_code":"GBP","in_stock":true},{"title":"26mm","offer_id":58332895478085,"sku":"01A26051","price":162.96,"currency_code":"GBP","in_stock":true},{"title":"27mm","offer_id":58332895510853,"sku":"01B27251","price":162.96,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1066\/1930\/6309\/files\/ng2_ce99c7b0-3f1f-474a-bf01-f9e547fc586f.jpg?v=1782074472"},{"product_id":"microscope-eyepiece-reticules-graticules-ng10-british-standard-globes-and-circles","title":"Microscope Eyepiece Reticules (Graticules) NG10 British Standard Globes and Circles","description":"\u003ch1\u003eMicroscope Eyepiece Reticules (Graticules) \u003c\/h1\u003e\n\u003ch1 class=\"text-secondary\"\u003eNG10 British Standard Globes and Circles\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEyepiece Reticle to satisfy Bristish Standard BS3625\/BS3260\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specification\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIn this reticle the circle areas double progressively, hence the diameters alter by Root 2, so that the size classes can form a continuation of the standard series of sieves for particle sizing. 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Originally designed by the National Coal Board for use in coal mining.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text-primary\"\u003eGlass Type and Thickness\u003c\/span\u003e\u003cbr\u003eSoda Lime 1.5mm thick\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text-primary\"\u003eDiameter Tolerance\u003c\/span\u003e\u003cbr\u003e+0\/-0.1mm\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text-primary\"\u003eOrientation\u003c\/span\u003e\u003cbr\u003eCorrect reading through glass\u003c\/p\u003e","brand":"Auckland Scientific","offers":[{"title":"16mm","offer_id":58332925657413,"sku":"01B16252","price":138.93,"currency_code":"GBP","in_stock":true},{"title":"19mm","offer_id":58332925690181,"sku":"01B19252","price":138.93,"currency_code":"GBP","in_stock":true},{"title":"20.4mm","offer_id":58332925722949,"sku":"01B20.4252","price":138.93,"currency_code":"GBP","in_stock":true},{"title":"21mm","offer_id":58332925755717,"sku":"01B21252","price":138.93,"currency_code":"GBP","in_stock":true},{"title":"23mm","offer_id":58332925788485,"sku":"01B23252","price":138.93,"currency_code":"GBP","in_stock":true},{"title":"24mm","offer_id":58332925821253,"sku":"01B24252","price":162.96,"currency_code":"GBP","in_stock":true},{"title":"24.5mm","offer_id":58332925854021,"sku":"01B24.5252","price":162.96,"currency_code":"GBP","in_stock":true},{"title":"25mm","offer_id":58332925886789,"sku":"01B25252","price":162.96,"currency_code":"GBP","in_stock":true},{"title":"26mm","offer_id":58332925919557,"sku":"01B26052","price":162.96,"currency_code":"GBP","in_stock":true},{"title":"27mm","offer_id":58332925952325,"sku":"01B27252","price":162.96,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1066\/1930\/6309\/files\/ng10.jpg?v=1782074666"},{"product_id":"microscope-eyepiece-reticules-graticules-ng12-new-porton-globes-and-circles","title":"Microscope Eyepiece Reticules (Graticules) NG12 New Porton Globes and Circles","description":"\u003ch1\u003eMicroscope Eyepiece Reticules (Graticules) \u003c\/h1\u003e\n\u003ch1 class=\"text-secondary\"\u003eNG12 New Porton Globes and Circles\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEyepiece Reticle with ruled grid and Globes\/Circles for particle sizing and counting\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specification\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe NG12 is particularly useful since the array of globes and circles are conveniently close to where the particles pass. At the end of each band of the sample the mechanical stage is traversed vertically to take in the next band until the whole sample has been covered. 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