Measuring resolution of Megapixel rated lens

[absolute2070 0]

Hello all,

Does anyone know of a reliable way to measure the lp/mm of camera lens? I have looked at the 1951 USAF Resolution Test chart, but the copies on the internet are low-res. You have to pay for the real thing and it can get pretty confusing on which chart to select. I would like to be able to resolve 100-200 lp/mm for 5 and 10 Megapixel lenses.

 

http://en.wikipedia.org/wiki/1951_USAF_resolution_test_chart

[Nimrod 0]

This site has a lot of info on test charts.

 

http://www.bealecorner.com/trv900/respat/

 

And here is about the cheapest test chart you can get.

 

http://www.edmundoptics.com/onlinecatalog/displayproduct.cfm?productid=1665

[absolute2070 0]

Thanks for the response Nimrod.

 

The chart that you recommended at Edmund Optics only resolves up to 14.30 lp/mm. I need something that can resolve 100 to 200 lp/mm. I just got off the phone with the good people at Edmunds Optics. They recommended the 1951 USAF Glass Slide Resolution chart. The price for the 2" by 2" glass slide is $120. This chart will resolve up to 228 lp/mm, but I don't think my boss will go for it.

 

Up till now I've been spending between $100 and $150 MSRP for lenses for our Megapixel cameras, none of which do justice to 2 MP and higher cameras. I'm trying to do better by my customers. I have a job that we bid on that will require 5 MP cameras and I'm looking for a IR corrected Varifocal lens that will do justice to them (4-12mm range).

[Soundy 1]

If the lens manufacturers don't list the lp/mm specs, you could always contact them and ask them. They probably HAVE those numbers, even if they don't publish them.

[absolute2070 0]

Thanks Soundy

 

I've sent emails to Stardot and Computar regarding this. Computar just replied back stating "We guarantee 200 lp/mm on this lens" ( I inquired specifically about the new "A" series AG3Z3112FCS MPIR lens). Stardot has not replied yet (I inquired about their 4.5-13mm 5 Megapixel rated Varifocal IR corrected lens). I assumed, incorrectly, that they would not disclose this information since they did not include it in the lens specifications pdf. I just hope that they are being truthful.