Wide-angle lens for miniature capsule endoscope

Mang Ou-Yang; Yung-Lin Chen; Hsin-Hung Lee; Shih-chieh Lu; Hsien-Ming Wu

doi:10.1117/12.645731

25 February 2006 Wide-angle lens for miniature capsule endoscope

Mang Ou-Yang, Yung-Lin Chen, Hsin-Hung Lee, Shih-chieh Lu, Hsien-Ming Wu

Proceedings Volume 6080, Advanced Biomedical and Clinical Diagnostic Systems IV; 608010 (2006) https://doi.org/10.1117/12.645731
Event: SPIE BiOS, 2006, San Jose, California, United States

Abstract

In recent years, using the capsule endoscope to inspect the pathological change of digestive system and intestine had a great break-through on the medical engineering. However, there are some problems needs to overcome. One is that, the field of view was not wide enough, and the other is that the image quality was not enough well. The drawbacks made medical professionals to examine digestive diseases unclearly and ambiguously. In order to solve these problems, the paper designed a novel miniature lenses which has a wide angle of field of view and a good quality of imaging. The lenses employed in the capsule endoscope consisted of a piece of plastic aspherical lens and a piece of glass lens and compacted in the 9.8mm (W) *9.8mm (L) *10.7mm (H) size. Taking the white LED light source and the 10μm pixel size of 256*256 CMOS sensor under considerations, the field of view of the lenses could be achieved to 86 degrees, and the MTF to 37% at 50lp/mm of space frequency. The experimental data proves that the design is consistent with the finished prototype.

Citation Download Citation

Mang Ou-Yang, Yung-Lin Chen, Hsin-Hung Lee, Shih-chieh Lu, and Hsien-Ming Wu "Wide-angle lens for miniature capsule endoscope", Proc. SPIE 6080, Advanced Biomedical and Clinical Diagnostic Systems IV, 608010 (25 February 2006); https://doi.org/10.1117/12.645731

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KEYWORDS

Endoscopes

Modulation transfer functions

Monochromatic aberrations

Distortion

Intestine

Inspection

Vignetting

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