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Wide-angle lens for miniature capsule endoscope

机译：微型胶囊内窥镜的广角镜头

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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.
机译：近年来，使用胶囊内窥镜检查消化系统的病理变化，肠道在医疗工程中有很大的突破。但是，需要一些问题需要克服。一个是，视野不够宽，另一个是图像质量不够。缺点使医疗专业人员不清楚，暧昧地检查消化系统疾病。为了解决这些问题，本文设计了一种新型微型镜片，具有广泛的视野和良好的成像质量。胶囊内窥镜中使用的镜片由一块塑料非球面透镜和一块玻璃镜片组成，并压实在9.8mm（w）* 9.8mm（l）* 10.7mm（h）尺寸。考虑到白色LED光源和10μm像素尺寸为256 * 256 CMOS传感器，镜头的视野可以实现为86度，并且在50LP / mm的空间频率下MTF至37％。实验数据证明了设计与成品原型一致。

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