Thanks for the input guys. I'm trying to get more info, but I'm a quantum Physicist by trade so I'm trying to wrap my head around how to compare the sensitivity of our sensor (which measures it as an oscillating electromagnetic field at a single point in space), which is measured in...
I'm currently working on a novel RF and MW sensor and I wanted to know whether there is a paper that shows the current very best receiver sensitivity for a range of wavelengths in the RF-MW range in dBm preferably so I can directly compare to my device.
Does anyone know of any studies into exactly how much various metals reflect or absorb microwaves with relationship to the microwaves wavelength and ideally theyt compounds too?
I am looking for what the high end radar receivers can achieve in terms of sensitivity? I have had trouble finding examples online, I have seen -100 to -103dBm as typical sensitivities, but I'm looking for the cutting edge stuff. I've also seen the GPS satellites also have a sensitivity of...
Hmm... its just difficult because the way Zemax works you have to have the image and object plain inverted for it to work for some reason. I can't reverse the black box lens so I'm left in a situation where I know roughly the quality of the lens, but I can't measure exactly how the spots will...
I think I was not being specific in my question. I am using a conventional optics setup with an object, objective lens and a CCD chip. My question is if the optics system is not perfect so light lies outside the airy disk then what is the resolution then?
If I know the magnification of the system, can I just extrapolate the size of the spots if I reverse the image and optical plain, by just multiplying their size by the magnification factor? Because of the reversibility factor of optics.
Does anyone know if there is a way to determine the resolution of an optics system that is NOT diffraction limited. I know you can calculate the resolution of a diffraction limited system using the Rayleigh criterion, but that assumes the system is diffraction limited. Is there some way using...
If you have an optics system where you know the spot diagram of the image at on imaging on one plain and projecting onto another. Where you know the spot size for a point source at a given distance from the centre of the field.
Now if you reverse the system where the imaging plain now becomes...
Ok I think I can get the diagonal elements to go to if I add the ##\frac{1}{\sqrt{N}}## factor but I still don't understand how the off diagonal elements go to zero.
I understand that I haven't put in the ##\frac{1}{\sqrt{N}}##. But why do I need the inverse? I'm trying to calculate whether the matrix is unitary so I need to find the inner product of the matrix and its complex conjugate, wouldn't I?
I'm trying to prove that the discrete form of the Fourier transform is a unitary transformation
So I used the equation for the discrete Fourier transform:
##y_k=\frac{1}{\sqrt{N}}\sum^{N-1}_{j=0}{x_je^{i2\pi\frac{jk}{N}}}##
and I put the Fourier transform into a N-1 by N-1 matrix form...