Optical Design with Narrow-Band Imaging for a Capsule Endoscope

Table 1

Design indicators.

Field of view (FOV)	110°
F/#	1/2.8
Half of the image height	2.3 mm
Effective focal length (EFL)	2 mm
Blake focal length (BFL)	1 mm
Total length	4 mm
Relative illumination	>50%
Distortion	<20%