Table 1.

Main characteristics of the MSS prototype optical head.

Focal length	3 mm
Field of view	94 × 81 deg (basic conf., 1 spot)
	52 × 28 deg (enhanced configuration, 10 × 10 spots)
	90 × 74 deg (enhanced configuration, 3 × 3 spots)
Mask
Material	steel
Thickness	0.1 mm
Number of holes	1/100 (enhanced configuration)
Hole diameter	0.2 mm
Hole arrangement (enhanced configuration)	10 × 10 array, 0.42 mm pitch (both directions)
Photodetector
Technology	CMOS Active Pixel Sensor
Model	MT 9M001 by Micron Technology, Inc.
Resolution	1280 × 1024 pixels
Pixel size	5.2 × 5.2 μm
Sensing area size	6.66 × 5.32 mm