Aiming at stray light suppression system of airborne miniature star sensor

study is carried out. Using point source transmittance（ PST） as standard

according to specialty of airborne miniature star sensor imaging system and baffle design principles

under the premise of trying not to increase system length

stray light suppression mechanism is designed. The baffle size and vane position are calculated by Matlab program and model is built by CAD software. The mechanism is then emulated in TracePro. The result demonstrates that the point source transmittance is 5. 536 × 10- 10

when the sun avoid angle is 30°. It is proved that the designed baffle can successfully suppress stray light and meet requirements of airborne miniature star sensor.