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조승현,진호,남욱원,차상목,이성호,육인수,박영식,박수종,한원용,김성수,Cho, Seoung-Hyun,Jin, Ho,Nam, Uk-Won,Cha, Sang-Mok,Lee, Sung-Ho,Yuk, In-Soo,Park, Young-Sik,Pak, Soo-Jong,Han, Won-Yong,Kim, Sung-Soo 한국천문학회 2006 天文學論叢 Vol.21 No.2
We have developed a control electronics system for an infrared detector array of KASINICS (KASI Near Infrared Camera System), which is a new ground-based instrument of the Korea Astronomy and Space science Institute (KASI). Equipped with a $512{\times}512$ InSb array (ALADDIN III Quadrant, manufactured by Raytheon) sensitive from 1 to $5{\mu}m$, KASINICS will be used at J, H, Ks, and L-bands. The controller consists of DSP(Digital Signal Processor), Bias, Clock, and Video boards which are installed on a single VME-bus backplane. TMS320C6713DSP, FPGA(Field Programmable Gate Array), and 384-MB SDRAM(Synchronous Dynamic Random Access Memory) are included in the DSP board. DSP board manages entire electronics system, generates digital clock patterns and communicates with a PC using USB 2.0 interface. The clock patterns are downloaded from a PC and stored on the FPGA. UART is used for the communication with peripherals. Video board has 4 channel ADC which converts video signal into 16-bit digital numbers. Two video boards are installed on the controller for ALADDIN array. The Bias board provides 16 dc bias voltages and the Clock board has 15 clock channels. We have also coded a DSP firmware and a test version of control software in C-language. The controller is flexible enough to operate a wide range of IR array and CCD. Operational tests of the controller have been successfully finished using a test ROIC (Read-Out Integrated Circuit).
이성호,육인수,진호,박수종,한정열,이대희,공경남,조승현,박영식,박장현,한원용,Lee, Sung-Ho,Yuk, In-Soo,Jin, Ho,Pak, Soo-Jong,Han, Jeong-Yeol,Lee, Dae-Hee,Kong, Kyung-Nam,Cho, Seung-Hyun,Park, Young-Sik,Park, Jang-Hyun,Han, Won-Yong 한국천문학회 2005 天文學論叢 Vol.20 No.1
The reimaging optics of the KASINICS (KASI Near Infrared Camera System) includes many transparent components like an entrance window, band-pass filters, and blocking filters. As observational targets or in-field background objects, bright stars may cause optical ghosts that can significantly degrade the system performance of the KASINICS. We estimated analytically the relative brightness of ghost components with respect to a point source and examined the effects of tilting optical components as a method of suppressing ghosts. We also performed numerical ray tracings including all the optical components and found the results are consistent with those of the analytic estimations. We conclude that the KASINICS will not suffer from significant ghost effects with appropriate anti-reflection coatings and fittings for the optical components.