{"product_id":"flat-field-holographic-concave-grating","title":"METICULAB MTL‑GRT Series Flat‑Field Holographic Concave Grating for Spectrometer","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; padding: 10px 0;\"\u003e\n\u003ch2 style=\"font-size: 24px; font-weight: 300; color: #1a1a1a; border-left: 4px solid #0b1a33; padding-left: 15px; margin-top: 0;\"\u003eFlat Spectrum, One Element: VLS Flat-Field Concave Grating for Miniature Spectrometers\u003c\/h2\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.7; color: #333; margin: 20px 0;\"\u003eWhen your spectrometer needs a flat focal plane for a CCD or CMOS detector, the \u003cstrong\u003eMETICULAB™ Flat-Field Holographic Concave Grating\u003c\/strong\u003e does two jobs in one element — dispersion and focusing — while projecting a flat spectral image directly onto your array detector. Variable line-space (VLS) design corrects astigmatism and coma, simplifying the optical path and shrinking instrument size.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.7; color: #333; margin: 20px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0791\/7695\/8204\/files\/detail-01-specifications.png?v=1786282596\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3 style=\"font-size: 18px; font-weight: 600; color: #1a1a1a; margin: 30px 0 12px 0; border-bottom: 2px solid #eee; padding-bottom: 8px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0791\/7695\/8204\/files\/detail-03-materials-quality.png?v=1786282683\" alt=\"\"\u003e\u003c\/h3\u003e\n\u003ch3 style=\"font-size: 18px; font-weight: 600; color: #1a1a1a; margin: 30px 0 12px 0; border-bottom: 2px solid #eee; padding-bottom: 8px;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; background: #f9fafb; border: 1px solid #e2e8f0; font-size: 15px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 600; width: 35%; background: #f1f5f9;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: bold; color: #0b1a33;\"\u003eVLS Flat-Field Holographic Concave Grating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 600; background: #f1f5f9;\"\u003eGroove Density\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: bold; color: #0b1a33;\"\u003e200 - 2400 lines\/mm, Custom Available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 600; background: #f1f5f9;\"\u003eSubstrate Material\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px;\"\u003eN-BK7 Optical Glass, Fused Silica optional\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 600; background: #f1f5f9;\"\u003eReflective Coating\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px;\"\u003eAluminum, Gold, Silver or Custom Coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 600; background: #f1f5f9;\"\u003eRadius of Curvature\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px;\"\u003e30 - 1000 mm, Custom Available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 600; background: #f1f5f9;\"\u003eImportant Notice\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px;\"\u003eFlat-field concave grating, NOT Rowland concave grating. Optical paths are not interchangeable.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"font-size: 18px; font-weight: 600; color: #1a1a1a; margin: 30px 0 12px 0; border-bottom: 2px solid #eee; padding-bottom: 8px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0791\/7695\/8204\/files\/detail-02-key-advantages.png?v=1786282505\" alt=\"\"\u003e\u003c\/h3\u003e\n\u003ch3 style=\"font-size: 18px; font-weight: 600; color: #1a1a1a; margin: 30px 0 12px 0; border-bottom: 2px solid #eee; padding-bottom: 8px;\"\u003eWhy METICULAB™ Flat-Field Concave Gratings?\u003c\/h3\u003e\n\u003cul style=\"font-size: 15px; line-height: 1.8; color: #333; padding-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat Focal Plane for Array Detectors:\u003c\/strong\u003e VLS variable line-space pattern corrects astigmatism and coma, projecting spectrum onto a flat plane that directly matches CCD \/ CMOS detectors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne Element, Two Functions:\u003c\/strong\u003e Dispersion and focusing in a single curved grating — fewer optical elements, simpler layout, smaller instrument footprint.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Stray Light, Ghost-Line-Free:\u003c\/strong\u003e Holographic manufacturing suppresses stray light and ghost lines for reliable weak-signal detection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Substrate \u0026amp; Coating:\u003c\/strong\u003e N-BK7 for UV-Vis-NIR, fused silica for deep-UV; aluminum, gold, silver or custom coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-Parameter Customization:\u003c\/strong\u003e Groove density, radius of curvature, dimension and mounting options tailored to your optical layout.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"font-size: 18px; font-weight: 600; color: #1a1a1a; margin: 30px 0 12px 0; border-bottom: 2px solid #eee; padding-bottom: 8px;\"\u003eStandard Reference Models\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; background: #f9fafb; border: 1px solid #e2e8f0; font-size: 13px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: #f1f5f9; color: #0b1a33;\"\u003e\n\u003cth style=\"padding: 8px 10px; border-bottom: 1px solid #e2e8f0; text-align: left;\"\u003eNo.\u003c\/th\u003e\n\u003cth style=\"padding: 8px 10px; border-bottom: 1px solid #e2e8f0; text-align: left;\"\u003eDimension (mm)\u003c\/th\u003e\n\u003cth style=\"padding: 8px 10px; border-bottom: 1px solid #e2e8f0; text-align: left;\"\u003eGroove (l\/mm)\u003c\/th\u003e\n\u003cth style=\"padding: 8px 10px; border-bottom: 1px solid #e2e8f0; text-align: left;\"\u003eSpectral Range (nm)\u003c\/th\u003e\n\u003cth style=\"padding: 8px 10px; border-bottom: 1px solid #e2e8f0; text-align: left;\"\u003eSpectral Width (mm)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e1\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eDia48x10\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e200\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e200-800\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e2\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eDia48x10\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e217\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e400-450\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e3\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e42x39x8\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e925\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e195-325\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e12.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e4\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e33.5x30x5\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e925\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e195-325\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e12.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e5\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e30x30x10\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e800\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e340-850\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e6\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e30x30x10\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e780\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e200-800\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e7\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eDia70 \/ 50 \/ 40 \/ 20\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e230\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e400-1100\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e23.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e8\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eDia70 \/ 50 \/ 40 \/ 20\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e405\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e380-780\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e9\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eDia70 \/ 50 \/ 40 \/ 20\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e285\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e190-800\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e25.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e10\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eDia15x5 (R=30)\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e300\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e200-800\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e11\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eDia24.8x23.4 (R=40)\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e300\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e200-800\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e12\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eDia35x32.3 (R=60)\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e400\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e1100-2500\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e13\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eDia35x32.3 (R=60)\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e400\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e800-1500\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e14\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eDia50x10.3 (R=398.83)\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e2400\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e180-900\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e15\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eDia56x48x11.5 (R=270)\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e1200\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e200-900\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e16\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e20x20\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e730\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e340-800\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 10px;\"\u003e36.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 12px; color: #7a8fa3;\"\u003eNote: Flat-field grating is optical-path dependent. Please provide wavelength range, curvature, detector size and installation dimension for an accurate proposal. R = radius of curvature (mm).\u003c\/p\u003e\n\u003ch3 style=\"font-size: 18px; font-weight: 600; color: #1a1a1a; margin: 30px 0 12px 0; border-bottom: 2px solid #eee; padding-bottom: 8px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0791\/7695\/8204\/files\/detail-04-service.png?v=1786282721\" alt=\"\"\u003e\u003c\/h3\u003e\n\u003ch3 style=\"font-size: 18px; font-weight: 600; color: #1a1a1a; margin: 30px 0 12px 0; border-bottom: 2px solid #eee; padding-bottom: 8px;\"\u003eApplications\u003c\/h3\u003e\n\u003cp style=\"font-size: 15px; color: #555;\"\u003eMiniature \u0026amp; Portable Spectrometers · CCD \/ CMOS Multi-Channel Spectral Detection · Fluorescence Spectroscopy · Industrial Gas \u0026amp; Water Monitoring · University \u0026amp; Research Setups\u003c\/p\u003e\n\u003cdiv style=\"background: #0b1a33; color: #ffffff; padding: 22px 28px; border-radius: 12px; margin-top: 30px; text-align: center;\"\u003e\n\u003cp style=\"font-weight: bold; color: #f5d98f; margin-bottom: 5px;\"\u003eMETICULAB™ — Precision Optical Components\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 10px;\"\u003e📧 \u003cstrong\u003echoikyuc@gmail.com\u003c\/strong\u003e | 📞 +82-10-3988-4813 | 🌐 www.meticulab.net\u003c\/p\u003e\n\u003cdiv style=\"font-size: 13px; color: #b8ccdd;\"\u003eWhatsApp \u0026amp; KakaoTalk Available\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size: 12px; color: #7a8fa3; border-top: 1px solid #edf2f7; padding-top: 16px; margin-top: 18px; text-align: center; font-style: italic;\"\u003eMETICULAB™ is a precision optical component brand. All gratings are produced in controlled cleanroom environment and monitored by ISO 9001 certified quality management systems.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"METICULAB","offers":[{"title":"Default Title","offer_id":50956198084860,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0791\/7695\/8204\/files\/01-hero-flatfield-front-2k.png?v=1786282375","url":"https:\/\/meticulab.net\/de\/products\/flat-field-holographic-concave-grating","provider":"METICULAB","version":"1.0","type":"link"}