论文信息 - Wide-angle stray-light reduction for a spaceborne optical hemispherical imager.

Wide-angle stray-light reduction for a spaceborne optical hemispherical imager.

We describe a simple visible-light stray-background-reducing baffle, suitable for use on a stabilized interplanetary platform. The design is a corrallike enclosure with five concentric walls. The baffle reduces direct sunlight and reflections from illuminated portions of the spacecraft by a factor of 10(-12), provided that all these lie beyond at least a hemisphere centered on the viewing aperture. With this condition these bright sources do not directly illuminate within the outermost wall of the corral, and diffraction over the wall tops is the dominant mechanism by which light reaches the corral interior. We present design calculations for such a corral, as well as a laboratory measurement confirming the basic design assumption.

[1] Bernard V. Jackson,et al. The identification and characteristics of solar mass ejections observed in the heliosphere by the Helios 2 photometers , 1990 .

[2] Bernard V. Jackson,et al. Helios images of solar mass ejections , 1985 .

[3] Serge Koutchmy,et al. Space-borne coronagraphy , 1988 .

[4] C Leinert,et al. Stray light suppression in optical space experiments. , 1974, Applied optics.

[5] B. Jackson,et al. The HELIOS spacecraft zodiacal light photometers used for comet observations and views of the comet west bow shock , 1990 .

[6] B. Jackson. Imaging of coronal mass ejections by the HELIOS spacecraft , 1985 .

[7] B. V. Jackson,et al. Helios spacecraft photometer observation of elongated corotating structures in the interplanetary medium , 1991 .

[8] Bernard V. Jackson,et al. Helios spacecraft and Earth perspective observations of three looplike solar mass ejection transients , 1985 .