6533b821fe1ef96bd127c30e
RESEARCH PRODUCT
Effective collecting area of lobster eye optics and optimal value of effective angle
Marco BarberaRichard WillingaleRené HudecRené HudecV. Tichýsubject
Multi-foil opticValue (computer science)X-ray opticsGrazing incidence opticPhoton energy01 natural scienceslaw.inventionTelescopeOpticsSettore FIS/05 - Astronomia E Astrofisicalaw0103 physical sciencesLobster eye010303 astronomy & astrophysicsPhysicsReflective optic010308 nuclear & particles physicsbusiness.industryAstronomy and AstrophysicsMaximizationFunction (mathematics)Astronomy and AstrophysicReflectivityEffective angleSpace and Planetary SciencebusinessX-ray opticdescription
Effective collecting area represents one of principal parameters of optical systems. The common requirement is to obtain as large effective collecting area as it is possible. The paper presents an analytical method of calculating effective collecting length and its maximization for lobster eye optics. The results are applicable for a Schmidt as well as for an Angel lobster eye geometry used in an astronomical telescope where the source is at infinity such that the incoming rays are parallel. The dependence of effective collecting area vs. geometrical parameters is presented in a form of a simple compact equation. We show that the optimal ratio between mirrors depth and distance (effective angle) does not depend on other geometrical parameters and it is determined only by reflectivity function, i.e. by mirrors (or their coating) material and photon energy. The results can be also used for approximate but fast estimation of performance and for finding the initial point for consequent optimization by ray-tracing simulations.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-02-14 |