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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC®組件由愛特蒙特光學設計、指定或製造。進一步瞭解

分光鏡補償片

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TECHSPEC 分光鏡補償片設計用於在採用 45° 入射角平板分光鏡的系統中平衡光程長度。這些視窗採用精密熔融石英製造,確保穿透光束與反射光束經過相同的材料厚度,藉此維持相位完整性與波前品質。搭配 TECHSPEC λ/10 平板分光鏡使用時,補償片有助於降低色散,並在嚴苛光學系統中維持高干涉對比度。TECHSPEC 分光鏡補償片具備 30 arcmin 楔角,可將內部干涉與背反射降至最低,使這些補償片成為精密應用的理想選擇。這些補償片非常適合需要精準光束路徑匹配的干涉量測、量測和光譜應用。

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在 Michelson 和其他干涉儀中使用時,分光鏡可能因其厚度而造成光程長度與色散的微小差異。補償片可修正此差異,並且在寬頻系統中特別有用。選擇補償片時,補償片應與所使用的分光鏡具有相同的基板與厚度,以確保正確調整光程長度。

Technical Information

Graph showing typical transmission percentage of 45° AOI beamsplitter with 400-700nm AR coating across wavelength range
Transmission percentage chart of 45° AOI beamsplitter with AR coating from 700 to 1100 nm wavelength
Reflectivity chart showing typical reflectivity of 45° AOI beamsplitter with 400-700 nm AR coating across wavelength range
Reflectivity curve of 45° AOI beamsplitter with 700-1100 nm AR coating showing typical reflectivity percentage
Beamsplitter Compensator Plates
Diagram showing beam path in an uncompensated interferometer setup. (Please note, reflected beams are depicted offset for demonstrative purposes).  Numbers refer to number of passes through the beamsplitter substrate. The blue beam (initially reflected at the beamsplitter) travels through the beamsplitter substrate three times, while the orange beam (initially transmitted through the beamsplitter) travels through the beamsplitter only once. This results in a differing path length and dispersion between the two beams once they arrive at the sensor.
Diagram showing beam path in an uncompensated interferometer setup. (Please note, reflected beams are depicted offset for demonstrative purposes). Numbers refer to number of passes through the beamsplitter substrate. The blue beam (initially reflected at the beamsplitter) travels through the beamsplitter substrate three times, while the orange beam (initially transmitted through the beamsplitter) travels through the beamsplitter only once. This results in a differing path length and dispersion between the two beams once they arrive at the sensor.
With the addition of a compensator plate of the same thickness and refractive index of the beamsplitter, the orange beam now experiences the same change in path length and dispersion as does the blue beam.
With the addition of a compensator plate of the same thickness and refractive index of the beamsplitter, the orange beam now experiences the same change in path length and dispersion as does the blue beam.
 
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