Fig. 1. Calculation procedure of MTF obtained from knife edge scanning method

Fig. 2. Schematic of MTF measurement of ultraviolet focal plane arrays

Fig. 3. Optical path of SW-Cassegrain reflective optical system

Fig. 4. Spot diagram of SW-Cassegrain reflective optical system at different field of view

Fig. 5. Comparison between measured and theoretical MTF data of knife-edge imaging optical system

Fig. 6. Theoretical design MTF value of knife-edge imaging optical system at different wavelengths

Fig. 7. UV FPA under test

Fig. 8. Lorentzian fit of area value under MTF curve at different positions

Fig. 9. Data processing of ESF curve

Fig. 10. Repeated MTF measurement results