2) Optical concentration ratio
光学聚光比
3) extinction ratio
消光比
1.
Study of the attenuator for the high extinction ratio testing system;
高消光比测试系统衰减器的研究
2.
An automatic measurement system for extinction ratio in visible spectrum based on correlation detection principle;
相关检测法宽光谱消光比智能化测试系统
3.
Effect of the extinction ratio on the performance of optical duobinary transmission;
消光比对光双二进制传输性能的影响
4) luminous transmittance
光透射比
1.
On the basis of the analysis and research about luminous transmittance and the scale number of the filter,this article proposes a solution to the specific definition of the response and holding time.
在对光阀的光透射比和遮光号进行研究的基础上,提出了对响应特性中响应时间和保持时间的精确定义。
5) specific rotation
比旋光度
1.
Through comparing the specific rotation of products that treat ed without saponification, we find that the products treated with saponifica tion have the higher specific rotation.
以提高天然VE 产品比旋光度为目的 ,用皂化与结晶相结合的方法对天然VE 浓缩物进行提纯。
2.
Several L-tartaric acid derivatives (1～6) were synthesized and their specific rotations were measured.
合成出系列的L 半螺旋型酒石酸衍生物 1～ 6 ,测定比旋光度 ,发现酒石酸二乙酯 2 ([α]2 5D+ 3 0 0° ,DMSO)形成 2 ,3 O 亚异丙基酒石酸二乙酯 3后旋光急剧往左偏移 ([α]2 5D - 4 5 0 3° ,DMSO) ,3酰胺化后比旋光值往右偏移 (4a :+ 11 19° ,4b :+ 2 14°) ,还原产物的比旋光值往左偏移 (5a :- 0 5 2° ,5b :- 4 92° ,6 :- 2 95°) ;并用分子的螺旋结构与基团的极化性质研究旋光规
3.
In this article we have analyzed mutarotation of D-glucose by means of physics ways determining specific rotation and statistical line method.
本文用物理学方法,借助于线性回归理论,通过比旋光度的测定来分析D-葡萄糖的变旋光现象,进而阐述温度和氨试剂等因素对D-葡萄糖溶液变旋现象的稳定平衡作用。
6) dulling luminosity ratio
吸光度比
1.
the influence of chilli growing area,extractive condition and concentrated method of chilli oil resin on the dulling luminosity ratio are studied.
研究了辣椒产地、提取条件及浓缩方法对吸光度比的影响。
补充资料：光比
两只用来照明某一被摄对象的灯光，就其产生的总效应来说，它们之间的强度差，就称为光比。摄影的光比指照明被摄对象的主光与副光之间的亮度值或照度值之比。光比的大小，决定着画面明暗反差，形成不同的影调和色调构成。光比还指对象相邻部分亮度之比。
光比大，反差则大，光比小，反差则小。光比的巧用，可有效的表达被摄体的“刚”与“柔”的特性。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条