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In this study, the noise-equivalent temperature difference (NETD) performance of an infrared camera was experimentally evaluated with blackbody imaging experiments conducted at various target-to-background temperature differences. The NETD was derived from pixel-level noise analysis of the acquired thermal images the provide a quantitative measure of the camera’s thermal sensitivity. To identify the major sources of background photon noise, ray-tracing simulations were performed using LightTools. The simulation results revealed that significant background radiation originated from the front section of the lens barrel near the optical entrance, thereby increasing the photon flux incident on the detector. To mitigate this effect, a modified lens barrel design was proposed that reduced the background radiation by approximately 28% according to the simulation and led to a measurable improvement in NETD from 65.3 mK to 57.1 mK. The improved configuration was fabricated and experimentally validated, confirming a substantial improvement in thermal sensitivity. These results demonstrate that the proposed design methodology effectively suppresses background radiation and improves NETD performance, and provides a practical guideline for the development of next-generation low-noise infrared imaging systems.

In this study, the noise-equivalent temperature difference (NETD) performance of an infrared camera was experimentally evaluated with blackbody imaging experiments conducted at various target-to-background temperature differences. The NETD was derived from pixel-level noise analysis of the acquired thermal images the provide a quantitative measure of the camera’s thermal sensitivity. To identify the major sources of background photon noise, ray-tracing simulations were performed using LightTools. The simulation results revealed that significant background radiation originated from the front section of the lens barrel near the optical entrance, thereby increasing the photon flux incident on the detector. To mitigate this effect, a modified lens barrel design was proposed that reduced the background radiation by approximately 28% according to the simulation and led to a measurable improvement in NETD from 65.3 mK to 57.1 mK. The improved configuration was fabricated and experimentally validated, confirming a substantial improvement in thermal sensitivity. These results demonstrate that the proposed design methodology effectively suppresses background radiation and improves NETD performance, and provides a practical guideline for the development of next-generation low-noise infrared imaging systems.

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기사명 저자명 페이지 원문 목차
Progress on ultra-relativistic electron acceleration from laser wakefield acceleration Mohammad Mirzaie, Hyung Taek Kim, Chulmin Kim, Kyung Taec Kim p. 581-597
Impact of atmospheric layer height variations on the performance of laser tomography adaptive optics Seok Gi Han, Ji Yong Joo, Ha Neul Yeon, Jun Ho Lee, Young Soo Kim, Yongsuk Jung, Hyeon Seung Ha, Eui Seung Son p. 598-607
Field-wise image plane tilt estimation using zernike defocus terms Mee Suk Jung, Ji Hye Song, Tae Yong Park p. 608-613
NETD performance analysis of an infrared camera with an improved background-to-target photon ratio Chan Young Park, Jung Hwan Kim, Ji Hye Kim, Kwang-Woo Park p. 614-626
Performance assessment of a portable near-infrared fluorescence probe for noninvasive regional lymph-node detection Hyeong Ju Park, Woosub Song, Sun-Hee Ahn, Hyeyoon Goo, Jin-Chul Ahn, In Hee Shin p. 627-634
Design of rear passivation and band-gap grading for high-efficiency Cu(In,Ga)Se2 thin-film solar cells Jun Yong Kim, Eun Jeong Jang, Yun Seon Do p. 635-642
Microlenslet-based holographic screen with flat-top beamforming to reduce vignetting effects Yongho Jang, Hoonjong Kang, Donghak Shin, Woosoon Kim p. 643-654
Model-less NIR through-focus scanning optical microscopy for depth estimation of embedded defects in OLED panels Ji Yong Joo, Jun Sung Lee, Ji Won Park, Se Jeong Kim, Jun Ho Lee, Oh-Hyung Kwon p. 655-665
Coupling characteristics of ZnMgO optical microring resonators Shuopei Jiao, Junjie Gao, Haoyang Du, Jing Zhang, Lei Wang, Xufang Zhang, Lei Meng p. 666-671
Deep-UV femtosecond source at 258 nm through harmonic generation of flat-top beams Jomsool Kim, Seungho Kwon, Ryon Cheong, Kilhwan Jeon, Byeong-Gu Lee, Nam Seong Kim, Min Yong Jeon, Jinju Kim, Yong-Ho Cha p. 672-679
Grain-size-dependent terahertz conductivity of MAPbI3 perovskite Byungwoo Son, Danbi Kim, Sung Heum Park, Jeong Woo Han, Nan Ei Yu, Do-Kyeong Ko p. 680-686

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