Ib qho kev cuam tshuam grating yog ib qho khoom siv kho qhov muag uas ua tiav lub teeb pom kev thiab tawg los ntawm etching cov kab sib txuas ntawm cov hlau zoo heev. Nws belongs rau qeb ntawm multi-slit Cheebtsam thiab feem ntau yog muab faib ua ob hom: planar reflection gratings thiab concave reflection gratings. Lawv yog tsim los ntawm depositing ib tug txhuas zaj duab xis rau ntawm lub iav dawb paug thiab ces etching parallel grooves nrog pob zeb diamond. Feem ntau zawj qhov ntom ntom yog 600 lossis 1200 grooves ib millimeter, nrog qhov ntom ntom txog 1800 grooves ib millimeter. Aluminium yog dav siv vim nws qhov kev xav tau siab thiab yooj yim ntawm kev ua haujlwm nyob ze -infrared rau ultraviolet ntau yam. Planar reflection gratings, los ntawm optimizing qhov zawj zoo, tuaj yeem mloog zoo lub zog rau ib qho kev txiav txim thiab yooj yim rau replicate, maj mam hloov prisms raws li cov ntsiab lus tseem ceeb ntawm spectrometers. Concave reflection gratings sib xyaw ua ke thiab ua kom pom kev ua haujlwm, feem ntau yog siv Rowland ntaus ntawv, Paschen ntaus ntawv, thiab Eagle ntaus ntawv raws li Rowland lub voj voog txoj cai.
Lub grating yog ntau -slit Cheebtsam. Lub cim ntawm cov grating spectrum yog qhov tshwm sim ntawm kev sib xyaw ua ke ntawm ntau -slit cuam tshuam thiab ib qho -slit diffraction. Ntau-slit cuam tshuam txiav txim siab txoj hauj lwm ntawm cov kab spectral, thaum ib zaug -slit diffraction txiav txim siab qhov sib faib ntawm cov kab ntawd. Gratings muab faib ua kis gratings thiab reflection gratings, nrog rau kev xav gratings feem ntau siv. Reflection gratings tuaj yeem muab faib ntxiv rau hauv cov phiaj xwm kev xav gratings (los yog blazed gratings) thiab concave reflection gratings (lossis yooj yim concave gratings).
