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CAS IR Grid
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长春光学精密机械与物... [9]
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会议论文 [4]
期刊论文 [4]
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专题:长春光学精密机械与物理研究所
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Off-axis three-mirror freeform optical system with large linear field of view
期刊论文
OAI收割
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering, 2016, 卷号: 45, 期号: 10
作者:
Meng, Q.
;
H. Wang
;
Y. Wang
;
Z. Ji and D. Wang
收藏
  |  
浏览/下载:18/0
  |  
提交时间:2017/09/11
Design of large relative aperture infrared athermalized optical system with chalcogenide glasses
期刊论文
OAI收割
Guangxue Xuebao/Acta Optica Sinica, 2015, 卷号: 35, 期号: 6
作者:
Shi, H.
;
X. Zhang
;
H. Qu
;
J. Zhang and H. Jiang
收藏
  |  
浏览/下载:15/0
  |  
提交时间:2016/08/24
Real-time video compression system design and hardware implementation
期刊论文
OAI收割
Guangdianzi Jiguang/Journal of Optoelectronics Laser, 2015, 卷号: 26, 期号: 9, 页码: 1747-1752
作者:
Xu, D.-D.
;
W.-H. Wang
;
Y. Zhang
;
T.-J. Fu and J.-Y. Ren
收藏
  |  
浏览/下载:14/0
  |  
提交时间:2016/08/24
给予HVS的H.264/AVC码率控制算法研究
学位论文
OAI收割
博士: 中国科学院大学, 2014
孙乐
收藏
  |  
浏览/下载:42/0
  |  
提交时间:2014/08/21
Interleaving assembly of TDICCDs on 600 mm focal plane
期刊论文
OAI收割
Guangxue Jingmi Gongcheng/Optics and Precision Engineering, 2014, 卷号: 22, 期号: 11, 页码: 2908-2913
作者:
Sun B.
;
Zhang X.-X.
;
Ren J.-Y.
;
Li J.-L.
收藏
  |  
浏览/下载:10/0
  |  
提交时间:2015/04/24
Intensity information extraction in Geiger mode detector array based three dimensional imaging applications
会议论文
OAI收割
5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013, June 25, 2013 - June 27, 2013, Beijing, China, June 25, 2013 - June 27, 2013
Fei W.
收藏
  |  
浏览/下载:13/0
  |  
提交时间:2014/05/15
Level 0 and level 1 data processing for a type of hyper-spectral imager (EI CONFERENCE)
会议论文
OAI收割
2009 International Conference on Optical Instruments and Technology, OIT 2009, October 19, 2009 - October 21, 2009, Shanghai, China
Li X.
;
Yan C.
收藏
  |  
浏览/下载:62/0
  |  
提交时间:2013/03/25
Hyper-spectral imaging (HSI) is a kind of optical remote sensor that can simultaneously obtain spatial and spectral information of ground targets. We are now designing a data processing system for a type of space-borne push-broom HSI
then it performs radiometric and spectral calibration based on the ground calibration results and onboard calibration collection. The detailed algorithms for bad pixel replacement
which has 128 spectral channels covering the spectral range from 400nm to 2500nm. With its large amount of spectral channels
radiometric and spectral calibration were presented. After processing
the HSI collects large volume of spectral imaging data need to be efficiently and accurately processed and calibrated. In this paper
the digital numbers downlinked from the spacecraft can be converted into at-sensor absolute spectral radiance of ground targets
the detailed Level 0 and Level 1 data processing steps for the HSI were presented. The Level 0 processing refers to a set of tasks performed on the data downlinked from the spacecraft
thus providing accurate quantified spectral imaging data for various applications. 2009 SPIE.
including decoding to extract science data
separating the science data into files corresponding to different tasks (e.g. ground imaging
dark imaging
and onboard calibration)
checking data integrity and instrument settings
data format conversion
and Level 0 files creation. The Level 1 processing performs several steps on Level 0 data. Firstly
it corrects the image artifacts (mostly the SWIR smear effect)
subtracts the dark background
and performs the bad pixel replacement according to the prelaunch measurement
Storage and compression design of high speed CCD (EI CONFERENCE)
会议论文
OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 19, 2008 - November 21, 2008, Chengdu, China
Cai X.
;
Zhai L. P.
收藏
  |  
浏览/下载:45/0
  |  
提交时间:2013/03/25
In current field of CCD measurement
large area and high resolution CCD is used to obtain big measurement image
so that
speed and capacity of CCD requires high performance of later storage and process system. The paper discusses how to use SCSI hard disk to construct storage system and use DSPs and FPGA to realize image compression. As for storage subsystem
Because CCD is divided into multiplex output
SCSI array is used in RAID0 way. The storage system is composed of high speed buffer
DMA controller
control MCU
SCSI protocol controller and SCSI hard disk. As for compression subsystem
according to requirement of communication and monitor system
the output is fixed resolution image and analog PAL signal. The compression means is JPEG2000 standard
in which
9/7 wavelets in lifting format is used. 2 DSPs and FPGA are used to compose parallel compression system. The system is composed of FPGA pre-processing module
DSP compression module
video decoder module
data buffer module and communication module. Firstly
discrete wavelet transform and quantization is realized in FPGA. Secondly
entropy coding and stream adaption is realized in DSPs. Last
analog PAL signal is output by Video decoder. Data buffer is realized in synchronous dual-port RAM and state of subsystem is transfer to controller. Through subjective and objective evaluation
the storage and compression system satisfies the requirement of system. 2009 SPIE.
Integrated optical amplifiers based on rare-earth doped (red) oxide glasses (EI CONFERENCE)
会议论文
OAI收割
International Symposium on Photonic Glass (ISPG 2002), October 14, 2002 - October 17, 2002, Shanghai, China
作者:
Chen B.
;
Chen B.
收藏
  |  
浏览/下载:25/0
  |  
提交时间:2013/03/25
Oxide glasses have been used since long time to host a number of active compounds
first of all rare-earth (RE) ions
for lasing. Recently
the advantages offered by guided-wave format
namely the small size
the high pump power density
and the larger flexibility in design and fabrication
led to the development of fiber lasers and amplifiers based on Er3+-doped glasses. Currently
a growing activity is aimed at achieving large optical gain in Er3+-doped planar waveguides
having in mind the single-chip realization of integrated optical amplifiers and lasers. The aim of the present paper is to provide a quick overview of this area and to briefly discuss possible future developments.