Fig. 1. Pixel layout of focal plane detector

Fig. 2. MTF measurement based on sinusoidal(cosine) input

Fig. 3. rectangular pulse array and the base wave of its Fourier expansion

Fig. 4. Output of rectangular pulse array and its matching with pixel sample

Fig. 5. MTF measurement system and its slit board

Fig. 6. Infrared radiation mode of a slit target and its Fourie base wave

Fig. 7. Sampling modle of an infrared slit target

Fig. 8. Phase shift of slit image relative to the reference pixel

Fig. 9. Time serial data by scanning slit image

Fig. 10. measurement result and measurement system

Fig. 11. Measurement result、measurement system and slit of case 2