The invention discloses a resolving power measuring device and a resolving power evaluation method for a three-generation dim light
image intensifier, and belongs to the field of optical measurement and metering. The resolving power measuring device is characterized by consisting of a
light source component, a resolving power target, a
collimator tube, an imaging objective lens, a test
camera obscura, a
charge coupled device (CCD) camera and a computer. The resolving power evaluation method comprises the following steps of: imaging the resolving power target irradiated by a standard
light source to a fluorescent screen by using a measured
image intensifier; converting into a frame image of a
target line by using the
CCD camera, and transmitting into the computer; successively
processing asingle frame image of the
target line by using a normalized cross correlation model and an optical modulation degree model through internal
image processing software of the computer to acquire a
single frame processing result; and analyzing multi-frame
processing results and performing corresponding supplement operation to acquire a final resolving power
evaluation result. By the device and the method, the problem of
objective evaluation during resolving power measurement of the three-generation dim light
image intensifier is solved; and the device and the method can be popularized to other measurement fields such as an intensified
charge coupled device (ICCD) measurement field and the like where resolving power is required to be objectively evaluated, and have wide application prospects.