CAJ | 학술논문

基于光强选通成像的液晶透过谱研究
기우광강선통성상적액정투과보연구
LCD Transmission Spectrum Based on Light Intensity Gated Imaging

万方数据

液晶与显示液晶與顯示 액정여현시
CHINESE JOURNAL OF LIQUID CRYSTALS AND DISPLAYS
2010年 2期 200-204 ,共5页

唐远河%张瑞霞%刘汉臣%刘术林%刘锴%郜海阳%杨旭三%赵高翔%李卿%梁元%叶娜

당원하%장서하%류한신%류술림%류개%고해양%양욱삼%조고상%리경%량원%협나

液晶%色散%选通成像液晶%色散%選通成像
액정%색산%선통성상
liquid crystal%dispersion%gated imaging

为了更好地将液晶器件应用于选通成像系统中,从理论上推导出了液晶器件透过率与波长、折射率、电压之间的关系.从双折射率与光强的关系定量分析了扭曲向列相液晶的色散效应.用光栅光谱仪选择380～1100 nm波段,以SONY公司LCX023CMT型号的TFT-LCD为样品,测试了液晶器件在不同灰度级和波长下的透射率.研究结果表明:液晶器件在可见光波段色散较小,随着灰度值的增加,色散增大;通过自制的光强局部选通成像系统对同一物体进行了对比拍摄,选通后的照片表明液晶器件的色散对成像质量影响不大;该液晶器件对红外光线有近12%的透过率,证明其可以实现近红外波段的强光局部选通成像.
위료경호지장액정기건응용우선통성상계통중,종이론상추도출료액정기건투과솔여파장、절사솔、전압지간적관계.종쌍절사솔여광강적관계정량분석료뉴곡향렬상액정적색산효응.용광책광보의선택380～1100 nm파단,이SONY공사LCX023CMT형호적TFT-LCD위양품,측시료액정기건재불동회도급화파장하적투사솔.연구결과표명:액정기건재가견광파단색산교소,수착회도치적증가,색산증대;통과자제적광강국부선통성상계통대동일물체진행료대비박섭,선통후적조편표명액정기건적색산대성상질량영향불대;해액정기건대홍외광선유근12%적투과솔,증명기가이실현근홍외파단적강광국부선통성상.
In order to better apply LCD to the gated imaging system, based on the electrooptic effect of LCD, the relationships between transmittance and wavelength, birefringence index, voltage are derived theoretically. The dispersive of twisted nematic liquid crystal is quantitatively analyzed from the relationship of effective birefringence and transmittance. By the grating spectrometer, the transmittance of liquid crystal is measured and analyzed using Sony LCX023CMT TFT-LCD at 380～1 100 nm wavelength and altering grey level from 0255 in this experiment. It was found that the LCX023CMT LCD has a low dispersion within the visible light. But dispersion increased along with the gray level. Two pictures have been shot under same environment by self-made partial gated imaging system or without which are contrasted each other, and there is little dispersive effect which can not affected the imaging quality. The partial light intensity gated can be realized for the strong near infrared by its 12 % transmittance.