光柵也稱衍射光柵。是利用多縫衍射原理使光發(fā)生色散（分解為光譜）的光學(xué)元件。它是一塊刻有大量平行等寬、等距狹縫（刻線）的平面玻璃或金屬片。光柵的狹縫數(shù)量很大，一般每毫米幾十至幾千條。單色平行光通過光柵每個(gè)縫的衍射和各縫間的干涉，形成暗條紋很寬、明條紋很細(xì)的圖樣，這些銳細(xì)而明亮的條紋稱作譜線。譜線的位置隨波長(zhǎng)而
上海祥樹TRQEH80M-00001
上海祥樹TRQEH80M-00001
上海祥樹TRQEH80M-00001
衍射光柵在屏幕上產(chǎn)生的光譜線的位置，可用式(a+b)(sinφ ± sinθ) = kλ表示。式中a代表狹縫寬度，b代表狹縫間距，φ為衍射角，θ為光的入射方向與光柵平面法線之間的夾角，k為明條紋光譜級(jí)數(shù)(k=0，±1，±2……)，λ為波長(zhǎng)，a+b稱作光柵常數(shù)。用此式可以計(jì)算光波波長(zhǎng)。光柵產(chǎn)生的條紋的特點(diǎn)是:明條紋很亮很窄，相鄰明紋間的暗區(qū)很寬，衍射圖樣十分清晰。因而利用光柵衍射可以精確地測(cè)定波長(zhǎng)。衍射光柵的分辨本領(lǐng)R=l/Dl=kN。其中N為狹縫數(shù)，狹縫數(shù)越多明條紋越亮、越細(xì)，光柵分辨本領(lǐng)就越高。增大縫數(shù)N提高分辨本領(lǐng)是光柵技術(shù)中的重要課題。
BOGE 563001606P
NOKEVAL 2041-20SA-OUT-24V
LEANTECHNIK SL 5.0 Z=105 NR.500161
GGB BB0810DU
HAWE HK43DT/1 M-H0 9-Z 11.3-A1/3-SWP 1 F-Y-1-X 24-AS 1 F 2/30-BA 2-SWPN 2-C/NZR 16 Q 33/3-1-X 24
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BST LD-1200-1-XL
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BROOK WU-DA90LK-D
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SKF GCL3125
SYNCHROFLEX AT10/730-16
B+R X20SO4110
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GOLDAMMER TR12-K1-A-FE-300
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moldclease HFFR Specimen upper and Lower:HFRR Lower specimens test plates + HFRR Upper specimens test balls
FIMET TYPE:MA200L8 N:22018009103 15KW 380V 32A 50HZ IP55 F 720RPM
GIMATIC AGG21-C
SIME TYP:2CAD NO.:99600 KOM NO.:905411
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SIBA 200031363/NH1
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SIKO KP04-10-I-A
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JUMO 202731/01-012/000
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MISATI SI-3NS
NSD VRE-EXIP062SAB
SCHUNK 0303311 PZN+80-1
SOMAS 29253 SKV-L5-ABT-N11-DN150-PN25
SITEC 710.3263-D-1-LD
