
I believe the suggestion was 3x3 not 9x9, which changes the numbers, but still doesn't make this a viable option. A standard 4/3 CMOS sensor won't have pixels all the way to the edge, unless you ...

I don't believe that is what J A C S is suggesting. You need to step back and consider the bigger picture. If tariffs are abolished, but volume of trade stays the same, then you have more money in ...

Spherical aberration arises when different zones of the lens (rays entering the lens at different distance from the axis) are focused at different distances from the lens. As you move through ...

Hi Jack, A few thoughts. If you are sufficiently far from focus for the geometric optics Circle of Confusion to dominate, then as you say, things are straightforward. The blur point spread function ...

I will pass on this for the time being. For image plane integration apodisation is not a problem. (1) I opted for a brute force 2D FFT of the pupil function.

Please outline an approach to put Hopkins 1955 equation into a form amenable to analytic derivation of your variance measures. Either the integral or the Bessel series expressions are amenable to ...

J A C S has addressed this. In any case So Goodman's 614 is hardly relevant here. Hopkins equation for OTF when imaging via a circular lens aperture is expressed both as an integral, and as an ...

19 citations for Bareket when I looked, assuming that is who you mean. Castaneda cites Bareket more than once. He calculates moments using a truncated integration region, centred on the PSF. The ...

I have some familiarity with the Petermann II mode field diameter and effective area, as applied to single mode optical fibres, but I don't know what you mean by "beam modes". Petermann II is a ...

<snip> OK. You presented a simple equation You justified it with a link to Bareket . Who defines the second moment of the PSF, m_2 in his first equation, in a form which I take to be the ...

<snip> From the abstract: "The second moment is the sum of a contribution of the aperture amplitude distribution, which yields a sometimes infinite term , and a term that is directly related to the ...

How do you calculate the variance in the diffractionlimited case? For a rectangular aperture, the diffractionlimited PSF is the product of sinc²() functions, and the integral (Baraket's equation ...

I am not clear if you are looking for advice on the specific UVfluorescence scheme you referenced, or more generally for headup display technologies. There are various projection schemes using ...

It is largely the second point  the usual methods for measuring MTF are not well suited. Veiling glare refers to light which spreads broadly over the sensor. For a slanted edge measurement, we ...

Jack, I agree that R = 2/CoC is unsuitable for a uniform geometric CoC. Here I was simply following Duovos' analysis , where this formula is presented without any justification. Duovos' analysis is ...

J A C S and AiryDiscus have explained why this approach is problematic, but let's take a closer look at Douvos' analysis. Effective CoC: C_tot = sqrt( CoC_diffraction ² + CoC_geometry ² ) where CoC ...

Probably. To first order, the dependence largely disappears if you analyse in terms of imagespace NA or working Fnumber, but in the context of the OP that is unnecessary hairsplitting, and a ...

I have to admit to being somewhat conflicted on this. As a card carrying pedant, I must concede your point regarding MTF vs OTF (and try to forget the times I have plotted negative MTF myself). Sim ...

To simplify, there are broadly three sources of variation in DN values recorded in the image. (1) Photon noise and read noise in the camera. (2) Intensity ...

As far as I can tell these are not standard deviations from a patch of uniform gray on the test chart. They are standard deviations over the entire image. (1) Standard deviation in each case is roughly ...
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