Resolution Target

RTT is a test target which stores the Ronchi Ruling parallel pattern, wedge type pattern, and USAF resolution test target
It is used when you want to decide on or check the performance of an optical system or the numerical tolerance (resolution) for photo technology.

The USAF resolution test target part has both positive and negative elements.
The number of line pairs per 1mm doubles for every 7 stages (the line pair refers to the combination of a light and dark bar).