計算機輔助光學設(shè)計codevs(編輯修改稿)
2025-02-02 17:26 本頁面
【文章內(nèi)容簡介】 ? f/ = EFL/EPD ? Note: some NAO systems will not fill a physical aperture stop (mon in photonics systems.) You still must specify a stop surface. Introduction to CODE V Training, Fall 2022, Slide 1?? Specifying the Pupil Object H H39。 Image THI S0 L Entrance pupil EPD q NAO = n sinq q = tan1(EPD / 2L) NA = NAO / RED = n39。 sinq39。 FNO = 1 / (2?NA) q39。 RED = – H39。 / H ? Infinite object: –?/ = EFL/EPD – NAO not valid Introduction to CODE V Training, Fall 2022, Slide 1?? Same Triplet, Different f/’s f/3 f/4 f/8 “Faster” “Slower” Introduction to CODE V Training, Fall 2022, Slide 1?? Field Definition ? Field definition describes how much of the object you image. ? Specify object angle, object height (finite object), image height. Object Image Object height (YOB) Object angle (YAN) Image height (YIM) Entrance pupil L YOB = YIM/RED YOB = L*tan(YAN) Introduction to CODE V Training, Fall 2022, Slide 1?? Aberrations ? Perfect imaging: point on object maps to point on the image, for all points on object and all rays through the aperture stop. ? Aberrations: deviations from this ? “1st order” aberrations: – Defocus: wrong image location – Tilt: wrong image orientation Introduction to CODE V Training, Fall 2022, Slide 1?? ThirdOrder Aberrations ? Spherical: focal length f varies with aperture height – only aberration onaxis ? Coma: magnification varies with aperture – rays through edge of aperture hit image at different height than rays through center of aperture ? Astigmatism: sagittal (xaxis) and tangential (yaxis) ray fans have different foci. ? Field curvature:
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