Resolution targets for lens testing

[Daniel D. Teoli Jr.]

Thorlabs make some nice targets of many designs. Positive and negative. Only issue is they are pricey. This one is a negative target for backlight use. It is a small target about 2x2 inches.

Max Levy also makes resolution targets.

Resolution Test Targets: II-VI Aerospace & Defense (maxlevy.com)

What type of target do you use for lens tests?

 

Edited February 2, 2022 by Daniel D. Teoli Jr.

[Phil Rhodes]

I just print 'em. Not so much of an issue with colour accuracy with a resolution target, and the dimensions are reasonably accurate.

[Daniel D. Teoli Jr.]

You gotta be careful with some of these targets Phil. Some are not good for hi-res tests if you are using for scanner use.

Here is one at B&H for 1/2 the price of the Thor target.

 

Here is one of the reviews for this target...

Good Low Cost Resolution Target - but    3/1/2015

By null

I purchased this product to evaluate my Epson R2400 scanner resolution. Before I scanned the Resolution Target I examined it under a microscope to provide a reference for the practical resolution range this target can produce. The microscope images show that the target has a significant amount of grain and the smallest resolving area of the target is under Grooup 6 with lots of grain. You can successfully evaluate a scanner with at best 5000 dpi. Group 7 is completely useless. So, if you are attempting to evaluate a scanner that is capable of 8000 dpi then this product is useless. For my Epson scanner the target served its intended purpose.

 

[Phil Rhodes]

Ah, we're talking about test targets for scanners, my mistake. Yes, buy those.