| Autor: |
Lucke, Robert L., Fischer, Jacqueline, Polegre, Arturo M., Beintema, Douwe A. |
| Zdroj: |
Applied Optics; October 2005, Vol. 44 Issue: 28 p5947-5955, 9p |
| Abstrakt: |
Placement of a scatter cone at the center of the secondary of a Cassegrain telescope greatly reduces Narcissus reflection. To calculate the remaining Narcissus reflection, a time-consuming physical optics code such as GRASP8 is often used to model the effects of reflection and diffraction. Fortunately, the Cassegrain geometry is sufficiently simple that a combination of theoretical analysis and Fourier propagation can yield rapid, accurate results at submillimeter wavelengths. We compare these results with those from GRASP8 for the heterodyne instrument for the far-infrared on the Herschel Space Observatory and confirm the effectiveness of the chosen scatter cone design. |
| Databáze: |
Supplemental Index |
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