To confirm the relationship between parameters of the curtain-type shutter and the exposure accuracy

the expression of exposure time is calculated. The main factors impacting the exposure time accuracy is analysed

and the errors is calculated with method of errors synthesized

provide the basis for the design. First

the expression of exposure accuracy is calculated according the principle of curtain-type shutter and its exposure time. Then

the analysis and calculation is done about the parameters of exposure time in the expression with method of errors synthesized. Finally

exposure accuracy is worked out on aero-camera. The experiment results indicated that: the slit width on the curtain-type shutter is proportional to exposure time between 1/100s-1/1000s

with the slit width increased the exposure time accuracy is also increased. The minimum exposure time accuracy is 6.4%

higher than the accuracy of 8.59% which is calculated on theory. The errors influenced by slit is 3.6 times as that influenced by velocity. The exposure time accuracy can be higher with the slit width increased.