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Hi Dan,
thanks for your reply and valuable information. As you said "If you want more information you'll have to tell us what you're trying to accomplish. Putting it in our context (film, no smaller...

hi,
Thanks to Leigh for clearing about BFL and FFL difference and mentioning that both of the paramaters are mentioned on spec sheet. Probably I will ask next time for these parameters. I think BFL...

Hi again,

I would like to put the same problem in this way what is the mount type for 400mm focal length zoom lens? Will a C-mount or CS-mount will work? upto what focal length the C & CS mounts...

Hi to All,

Can any one help me in finding that what will be the back focal length (BFL) of a zoom lens of 400mm focal length? By BFL I mean the distance from last surface of lens to senor/image...

I would like know how to define Contrast in CCD. They say it is

C = (Average Target Intensity - Avg Back ground Intensity) / Peak white noise

Michelson contrast is defined like: C = (Imax -...

Any solutions for this problem....

Hi,

I have a train of plane mirrors which will be used to relay a laser beam in a folded path. For that the mirrors has to be aligned at an incidence angle of 45 degree - means each mirror will be...

Hi to All,

Here is a puzzle:

If I have to combine 2 optical beams (of same spectrum) using a beam splitter (division of ampiltude), like; dichroic dual beam combiner etc...then I need 1 such...

Interference filter is basically to enhance the transmittence. If there are 2 surfaces then the minimum reflection from each surface will be 4% leading to minimum transmittance of around 93% without...

Hi,
I would like to know is it possible to have a Band pass Interfernce filter with following specifications:

Centre Wavelenght: 1064 +/- 2nm
Peake Transmission: >90%
FW at 50% of peak...

Thanks Dave Parker,

What you said is right, I also feel that (in my 3rd qestion), it is used for the uniform illumination. Its okay here in this case but what about when we use the GG in imaging...

Hi,
I would like to start this new thread as I did not find any satisfactory information related to this topic except something in Wikepedia. Hence I needed help of experts so I came here. My...

Thanks to Emmanuel Bigler for explaining all that. The doubts got dispurse after your clear and indepth views.

The fundamnetal 'why?' question is still unanswered. Why resolution of a combined system (lens +sesor) is always less then Rs and Ro both? Where Ro is optics resolution and Rs is sensor resolution....

Thanks aduncansun for bringing my question again into focus. I was trying to find the answer for my question from various replies but i could not comprehend most of them except few.

As you said...

Hi,
According to common sense, if I have an optics of let say 120 lp/mm resolution then I must select a sensor of at least 120 lp/mm resolution to get over all resolution of the combined sytem...