Re: Semi-telecentric wide angle objective lens

Brian wrote:
Where can I get an objective, off the shelf, with focal length ~10 mm,
at least f/1.5, but better f/1.1, covering a field of view of 17
degrees (total) and approximately telecentric at the image (diameter
3.1 mm)? Wavelength is 0.9 microns, environment is outdoors.

Brian Blandford
Ancient and Modern Optics

That's quite a specification list! NA=0.45 in a telecentric lens sounds like a 20X microscope objective...which you can get with a 200 mm tube length, pretty close to two of your specs (at least in the visible) but that 3.5 mm FOV is going to be the deal breaker there. I have a couple of _really_expensive_ Mitutoyo IR microscope objectives that would be within a factor of 2 of most of those specs...but they were $10k apiece, back in the day.

Cheers,

Phil Hobbs
.