Three primary kinds of noise in the astronomical CCD camera system were analyzed: photon noise,readout noise and dark current noise,etc.
全面分析了天文CCD相機(jī)系統(tǒng)中的幾類主要噪聲:光子噪聲、讀出噪聲和暗電流噪聲等,提出了在低照度條件下的信噪比(SNR)模型,并進(jìn)一步提出了在不同曝光時(shí)間長度下CCD的信噪比簡化模型。
Parallel analog channels for oversampling scientific CCD camera signal;
科學(xué)級CCD并聯(lián)過采樣低噪聲模擬信號通道
The optical system construction and working principles of intelligent north-finding gyroscope system based CCD(charge coupled device)image sensor and DSP(digital signal processing)technology is described.
介紹了基于CCD圖像傳感器與DSP技術(shù)的陀螺儀智能尋北系統(tǒng)的結(jié)構(gòu)與工作原理,重點(diǎn)介紹了與DSP有關(guān)的電子硬件和軟件部分,尋北方法在DSP特定環(huán)境下的應(yīng)用,給出了系統(tǒng)的硬件原理圖和軟件流程圖,最后總結(jié)了這套系統(tǒng)在陀螺儀尋北中的優(yōu)點(diǎn)。
An instrument for auto measuring the width and length of wood board which based on the one-dimensional linear array CCD(charge coupled device)sensor and computer technique is introduced.
本文采用一維線陣CCD,利用照相機(jī)鏡頭成像的方法,通過調(diào)節(jié)鏡頭焦距就能獲得木材直徑的一維圖像,打破了其他檢測裝置用平行光掃描的局限性,消除了光線不平行帶來的誤差,省去了平行光產(chǎn)生、掃描、會聚裝置(如拋物鏡等),使復(fù)雜精密的光學(xué)系統(tǒng)簡單化,降低了成本。
EUV Response Calibration of Astronomic CCD
空間天文CCD在EUV波段的光譜響應(yīng)定標(biāo)測試
The Application of Real-time Operating System in Astronomic Fast Readout CCD;
實(shí)時(shí)操作系統(tǒng)在天文快讀CCD上的應(yīng)用
Technical Testing of Drift-scan CCD Camera;
天文漂移掃描CCD相機(jī)的技術(shù)驗(yàn)證
Research on Astronomical CCD Image Processing Technology Based on DSP;
基于DSP的CCD天文圖像處理技術(shù)研究
Design and Implementation of Denoising and Star-Searching in CCD Astronomical Images;
CCD天文圖像去噪和對象搜索算法的設(shè)計(jì)與實(shí)現(xiàn)
NOTE ON THE STABILITY OF THE #1 CCD CAMERA OF THE 1.56m REFLECTOR
關(guān)于上海天文臺1.56m望遠(yuǎn)鏡#1 CCD照相機(jī)的穩(wěn)定性
PERFORMANCE STUDY OF THE NEW CCD CAMERAS OF YUNNAN OBSERVATORY
關(guān)于云南天文臺1m望遠(yuǎn)鏡新CCD照相機(jī)的某些性能
UNSOLVED DETERIORATION OF THE CCD CHIP IN I WAVEBAND WITH UNKNOWN CAUSE
CCD芯片在I波段未明原因的一種退變(英文)
The Study of Imaging Quality and Resolution of CCD Space Camera Base on Model Experiment and Computer Emulation;
基于模擬實(shí)驗(yàn)及計(jì)算機(jī)仿真的CCD航天相機(jī)影像分辨力的研究
The beam characteristics of exeimer lasers are detected by using a two dimensional CCD array.
本文采用二維CCD列陣檢測準(zhǔn)分子激光的光束特性。
an astronomical [a meteorological] observatory
天文 [氣象] 臺
In the paper the algorithm of calculating parameters, the method of structure layout, and the way of mounting linear CCD on laser spot source probe are analyzed at all details.
本文詳細(xì)分析了點(diǎn)光源激光測頭設(shè)計(jì)參數(shù)計(jì)算及結(jié)構(gòu)布局方法，線陣CCD器件安裝方式。
Hunan Culture & Hunan Literature and Art
湖湘文化與湖南文藝:昨天·今天·明天
vehicles for space astronomical observation
空間天文觀測航天器
astronomical tide
天文潮天文潮天文潮汐(受日月吸力影響的潮汐
HubBle distance
哈勃距離(天文學(xué))
HubBle's law
哈勃定律(天文學(xué))
Razin effect
拉金效應(yīng)(天文學(xué))