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Novel Lens Design attn. Koshkin

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/04/2008 at 15:44
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I'm a newby here with minimal knowledge on lenses.  I'm hoping that someone here can assist me in locating a lens for a specialty application.  A couple of decades ago, I remember reading about an unusual lens that was a fisheye along one axis and a much narrower field of view in the other.  For lack of the correct term, I guess you could call it a panorama lens - although I've had no luck locating it under that term.  My application is to look at a narrow swath of sky from horizon to horizon to track a volcanic plume from Kilauea volcano.


Suggestions on where I might find something like this - or even the correct name for this type of lens would be a tremendous help.


Thanks very much.


Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/04/2008 at 19:22
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Is your interest to photograph or simply view?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/04/2008 at 19:34
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If it for photography, the following company would be a good first reference!
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/07/2008 at 23:04
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SChunter:
My application is fairly unique:  I am working with some folks who monitor the gases discharged from active (and potentially active) volcanoes.  A new device has been designed that "looks" through a volcanic plume and, based on the reduction in transmission of certain spectral lines, it is possible to determine the amount of sulfur dioxide present in the plume.  We would like to set up an automated sensor that can look at a narrow swath of the sky, from horizon to horizon, and be able to detect the plume and perform the necessary calculations to determine the sulfur dioxide content in the plume.  In application, I suspect that we would mask portions of the image (detected by a ccd) so image quality at the edges is not of significant concern.
Many thanks


Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/07/2008 at 23:17
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Very interesting, drradon!  Welcome to OT!  I hope you get the answers you seek.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/09/2008 at 19:34
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What wavelength range are you looking at?

Why can't you use a regular fisheye lens?  you do not need the whole image, just take a horizontal strip.

ILya
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/09/2008 at 19:37
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Originally posted by koshkin koshkin wrote:

What wavelength range are you looking at?

Why can't you use a regular fisheye lens?  you do not need the whole image, just take a horizontal strip.

ILya
 
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Member "Silver" is a shutter bug maybe he can help too.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/09/2008 at 20:00
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I do not know if this will work, but hav you looked at anamorphic lenses that are used for some projectors and such?

ILya
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/09/2008 at 21:36
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cool!  the imaging market and the potentials, such as the area that you are working in, are amazing.  In dentistry, the imaging and quality of images has grown exponentially, and things we didn't know were possible years ago, now become the norm (or better is yet to come!).
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/09/2008 at 21:55
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a local company uses this technology (Kennecott-Rio Tinto) to determine the amount of FL emissions from there incredibly large smoke stack. try contacting them. also do a web search on hexaflourides in industrial emissions.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/09/2008 at 21:58
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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/10/2008 at 02:50
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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/10/2008 at 07:06
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That's ok Merc, my old Pentax is still capable of taking way better pictures than me.
 
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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/10/2008 at 10:48
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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/11/2008 at 15:53
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Thanks everyone for your suggestions and responses. 
I'm pretty ignorant about lenses in general - but my feeling was that the standard fisheye would distort the image pretty seriously as the edges are approached.  Making this thing work is going to be a challenge even without the distortion - we are using uv spectra generated by scattering of sunlight in the upper atmosphere and as we approach the horizon, the intensity of the scattered light will be changing.  We will also probably have to set up a system as a paired imaging system that will "locate" the plume based on the angle off vertical that each system detects the light absorption at and then use that location to back calculate a precise number for the tonnage of SO2.  Currently, we are doing that with a rotating mirror driven by a stepping motor... In any event, the less distortion at the edges of the two images, the easier it will be to set up the application in the field.

All ideas are welcome -

Many thanks again
drradon
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