ELU系列伽利略扩束器设计用于扩大或缩小准直光束的直径,同时引入的波前误差小于λ/4(即衍射极限性能)。一束扩展光束能被聚焦为更窄的衍射受限束腰;在使用具有窄的输入孔径的光学元件或仪器(比如SA200系列扫描法布里-珀罗干涉仪)时,这样的缩小的光束有时是必需的。
Item # | Ravga | Tb |
Damage Thresholdc |
Mag. |
Max Input Beam Diameterd (1/e2) |
Input Aperture |
Narrowband AR Coating |
Scratch-Dig |
Housing Dimensions |
---|---|---|---|---|---|---|---|---|---|
ELU-25-2.5X-248 | <0.2% | >96% | 500 MW/cm2 | 2.5X | 4.4 mm | Ø9 mm | 248 nm | 10-5 | Ø38 x 126 mm |
ELU-25-2.5X-351 | <0.2% | >96% | 500 MW/cm2 | 2.5X | 4.4 mm | Ø9 mm | 351 nm | 10-5 | |
ELU-25-5X-248 | <0.2% | >96% | 500 MW/cm2 | 5X | 2.2 mm | Ø9 mm | 248 nm | 10-5 | Ø37.9 x 135.0 mm |
ELU-25-5X-351 | <0.2% | >96% | 500 MW/cm2 | 5X | 2.2 mm | Ø9 mm | 351 nm | 10-5 | |
ELU-25-10X-248 | <0.2% | >96% | 500 MW/cm2 | 10X | 1.1 mm | Ø9 mm | 248 nm | 10-5 | Ø38 x 203 mm |
ELU-25-10X-351 | <0.2% | >96% | 500 MW/cm2 | 10X | 1.1 mm | Ø9 mm | 351 nm | 10-5 | Ø38.0 x 202.1 mm |
ELU-25-20X-248 | <0.2% | >96% | 500 MW/cm2 | 20X | 0.6 mm | Ø3.5 mm | 248 nm | 10-5 | Ø38 x 278 mm |
ELU-25-20X-351 | <0.2% | >96% | 500 MW/cm2 | 20X | 0.6 mm | Ø3.5 mm | 351 nm | 10-5 | Ø37.9 x 262.1 mm |
Specification | ELU Series | EL Series | ELQ Series |
BE Series (Fixed) |
BE Series (Variable, Rotation) |
BE Series (Variable, Sliding) |
BE Series (Reflective) |
---|---|---|---|---|---|---|---|
Expansions Available | 2.5X, 5X, 10X, 20X | 2.5X, 3X, 5X, 10X, 20X | 2.5X, 5X, 10X, 20X | 2X, 3X, 5X, 10X, 15X, 20X |
2-5X 5-10X |
0.5 - 2X | 2X, 4X |
Collimation Adjustment Mechanism | Sliding | Rotation | Sliding | Fixed | |||
AR Coating Range(s) Available |
248 nm 351 nm |
400 - 650 nm 650 - 1050 nm 1050 - 1620 nm 3000 - 5000 nm |
1064 ± 40 nm |
400 - 650 nm 650 - 1050 nm 1050 - 1620 nm |
400 - 650 nm 650 - 1050 nm |
None | |
Mirror Coating (Range) |
None |
Silver (450 nm - 20 μm) |
|||||
Average Reflectivity (per Surface) |
<0.2% | <2% | <0.2% | <0.5% | <0.5% | >96% | |
Max Input Beam Diameter (1/e2)a |
2.5X: Ø4.4 mm 5X: Ø2.2 mm 10X: Ø1.1 mm 20X: Ø0.6 mm |
2.5X: Ø4.4 mm 3X: Ø4.0 mm 5X: Ø2.2 mm 10X: Ø1.1 mm 20X: Ø0.6 mm |
2.5X: Ø4.4 mm 5X: Ø2.2 mm 10X: Ø1.1 mm 20X: Ø0.6 mm |
2X, 3X: Ø4.0 mm 5X, 10X, 15X, 20X: Ø2.25 mm |
Ø3.0 mm |
0.5X: Ø6.0 mm to 2X: Ø3.0 mm |
Ø3 mm |
Input Aperture |
2.5X: Ø9 mm 5X: Ø10.9 mm 10X: Ø9 or Ø10.9 mm 20X: Ø3.5 or Ø3.8 mm |
2.5X: Ø9 mm 3X: Ø11.0 mm 5X: Ø10.9 mm 10X: Ø9 or Ø10.9 mm 20X: Ø3.5 mm |
2.5X: Ø11 mm 5X, 10X: Ø10.9 mm 20X: Ø3.5 mm |
2X, 3X: Ø8 mm 5X, 10X, 15X, 20X: Ø4.5 mm |
Ø8.0 mm | Ø10.0 mm | Ø6 mm |
Wavefront Error | <λ/4 | <λ/10b | |||||
Scratch-Dig | 10-5 (20-10 for -E Coating) | 20-10 | 40-20 | ||||
Optics | Two Best-Form or Spherical Lenses | One Plano-Concave Singlet, One Doublet | Spherical Singlets and Doublets | Two Spherical Mirrors |
外壳内包含两个最佳形状透镜,设计用于使重新准直的光束的像差最小化。两个光学元件都镀有窄带增透膜,以最大限度地减小表面反射。输入透镜安装在一个精密磨制的套管中,可以从装有输出透镜的套管中滑进和滑出。滑动设计允许调整准直透镜,并最小化透镜调整时固有的光束走离效应。扩束器可以通过底座上的1/4英寸-20或M6螺纹孔来安装。此外,使用CL6安装栓(不包括在内),磨制在基座中的槽可用于把扩束器夹持到光学平台上。扩束器具有螺纹输入和输出孔径,它可以让额外的透镜和滤光片沿着扩束器的光轴简便安装。
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