Vol. 48, Issue 2, pp. 325-335

Vol. 48 Issue 2 pp. 325-335

Truncated two-stage compound parabolic concentrator for collecting human diffuse transmission light

Jing Gao, Guang Han, Qipeng Lu, Haiquan Ding, Jianghong Xu, Jihao Sun

Keywords

optical design, compound parabolic concentrator (CPC), non-imaging optics, near infrared spectroscopy, medicine optical instrument

Abstract

We propose an optical system employing a compound parabolic concentrator for near infrared spectroscope in noninvasive blood components testing. A truncated two-stage compound parabolic concentrator system is designed, which consists of a normal first-stage compound parabolic concentrator and a truncated second-stage compound parabolic concentrator. Using advanced ray tracing technique, the optical efficiencies of truncated two-stage compound parabolic concentrator system, ellipsoidal mirror system and non-optical-focusing mirror system are calculated to be 25.4%, 22.4% and 4.0%, respectively. Furthermore, the total length of truncated two-stage compound parabolic concentrator is only about 68 mm while the ellipsoidal mirror is 110 mm. It indicates that the truncated two-stage compound parabolic concentrator system enhances the ability of concentrating human diffuse transmission light, and it is a benefit to improve signal-to-noise ratio of noninvasive biochemical analysis system efficiently. Due to the advantage of small size, it tends to achieve a miniature instrument.

Vol. 48
Issue 2
Article No: 14
pp. 325-335

0.41 MB
OPTICA APPLICATA - a quarterly of the Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology