Optical resolution measurement method for optical devices

A method, comprising:

• projecting, by a light engine, a first instance of an image of a pattern along an optical path during a first period of time;
• capturing, by a detector, the first instance of the image;
• obtaining a first fast Fourier transform (FFT) corresponding to the first instance of the image;
• projecting, by the light engine, a second instance of the image along the optical path during a second period of time occurring after the first period of time;
• capturing, by the detector, the second instance of the image from one or more optical devices positioned along the optical path between the light engine and the detector after the first period of time;
• obtaining a second FFT corresponding to the second instance of the image;
• and
• determining an optical device modulation transfer function (MTF) of the one or more optical devices, the optical device MTF determined by comparing the first FFT to the second FFT.

A method, comprising:

• projecting, by a light engine, a first instance of an image along an optical path during a first period of time;
• determining, based on the first instance of the image captured by a detector, a first fast Fourier transform (FFT) or a first optical device modulation transfer function (MTF);
• projecting, by the light engine, a second instance of the image along the optical path during a second period of time occurring after the first period of time, wherein the optical path includes one or more optical devices added to the optical path after the first period of time and positioned between the light engine and the detector;
• determining, based on the second instance of the image captured by the detector, a second FFT or a second MTF;
• and
• determining an optical device MTF of the one or more optical devices, wherein the determining the optical device MTF comprises:
• dividing the second MTF by the first MTF;
• or
• dividing the second FFT by the first FFT.