光

The possibility of liquid crystal used in optical isolator is discussed based on the selective reflection of cholesteric liquid crystal.

实验结果证实，液晶光隔离器对单色光具有较好的光隔离特性(光隔离度=13dB)和较高的正向透过率(插入损耗=1dB)，在大口径光隔离器的制造上具有重要的应用价值。

There are two stages: rough adjustment and careful adjustment. During rough adjustment: the laser optical axis is considered as the normal axis of measurement optical path, and the coaxal measurement system is established. During careful adjustment: the tilt coefficient of WYGO interferometer is considered as the adjustment standard to adjust the objective, so the actual result of the object surface quality is ensured.

调整分为粗调和精调两个阶段，在粗调阶段，以激光的光轴作为检测光路的基准光轴，建立起共轴光路检测系统；在精调阶段，以WYGO干涉仪内部倾斜系数作为调整依据，进行物镜的精调，从而保证检测结果反应真实的物镜面形质量。

The electrooptic effect of the optical active crystals is studied in the experimental set of polarized light interference.

研究了旋光晶体在偏光干涉实验中的电光效应，给出了旋光晶体在偏光干涉实验中出射光强与晶体旋光性之间关系的表达式I =A20 cos2 β-l ，以及与旋光晶体电光效应之间关系的表达式I =A20 cos2 β-l+(n2 -n1)l 。

The great ring emerging with glory caused by ice cloud and fog is in fact an anti-solarhalo,which is leading to a conclusion that the dominant Van de Hulst's backward scattering theory on the formation of glory in recent years can not be used to illustrate all phenomenon concerning glory and gives a denial to the formulation that ice cloud and fog cannot produce any glor...

由冰晶云雾产生的宝光，其伴生的大光环实为对日晕，从而肯定了近年来盛行的范氏宝光形成的后向散射机理，不能用以解释一切宝光现象，否定了冰晶云雾不能产生宝光的局限认识。还指出了《国际气象词典》中&布格晕&条释义的错误。

Fourteen sediment samples with different content of Fe〓O〓 were collected from lower reach of the Liao River in China. The photodegradation of γ-hexachlorocyclohexane on the sediment surfaces was investigated to observe the effects of Fe〓O〓 and other photoinducable substances, such as TiO〓 and organic substances, on photodegradation of γ-HCH.

从辽河新民段采集了14种具有不同含量的Fe〓O〓的天然沉积物，为了探讨沉积物中Fe〓O〓和其它具有光诱导和光催化能力的物质如TiO〓和有机质成分对沉积物表面上的林丹的光解的影响，研究了γ-HCH在这些沉积物表面上的光解动力学。

These are main problems of eutrophication.In this paper we selected alga that suits to grow under different concentration of nutrition, after selecting seed, domesticating, culturing alga purely in the lab, we gained Hydrodictyon reticulatum and microalga, most of which are Miorocystis and chlorella.

本文选取在不同营养水平条件下适合生长的藻类物种，在实验室进行选种、驯化和纯化培养，得到水网藻和微藻(主要为微囊藻Miorocystis、小球藻chlorella)；以实验室培养的生长速度快、生产能力高的水网藻为原料，制备一系列环境友好性光敏物质——叶绿素及其衍生物，运用光敏氧化分光光度法测定活性氧(O_2~-，H_2O_2，·OH，和~1O_2)，根据其光敏产生活性氧效率，进行光敏物质的筛选；选用叶绿素铜及其钠盐，以微藻为实验控制对象，以Cu~(2+)作培养对照，在相同光照、营养条件下进行控藻实验。

MIPC was photocatalytically transformed to 3,4-dihydroxyl hypnone, 2-iso-butyl phenol and acetic acid, and mineralized ultimately in oxygenated TiO2 slurries. The photocatalytic degradation processed according to first order kinetics with the apparent rate constant depending on initial concentration, light intensity and the amount of catalyst. The amount of catalyst had an optimum value (0.5g/L). The apparent rate was inversely proportional to square root of the initial concentration approximately.

MIPC能被光催化转化成3，4-二羟基苯乙酮、2-异丁基苯酚和乙酸等产物并最终被矿化，MIPC的光催化反应过程符合一级动力学规律，其表观速率常数与MIPC的起始浓度、TiO2量和光强等因素有关，MIPC降解的反应速率与入射光强成正比，与MIPC初始浓度的平方根成反比。

It was found in this investigation that boron exerted considerable influenceon the nucleation and growth of pearlite. In a hypoeutectoid steel, boron delayedthe starting time of pearlite formation at the maximum pearlite formation temp-erature. Boron did not effect the relation of nucleation rate with time butonly increased the incubation period for pearlite nucleation.

从实验结果证明，硼对珠光体的成核及成长是有影响的；在亚共析钢中硼促使珠光体的开始形成时间推迟，增长了珠光体成核的孕育期，但对成核率与时间的关系，在近于A_1温度(700℃)时，略为加速，而在珠光体转变速度最大的温度(650℃)时却没有影响。

Electron donating substituent CH〓, OCH〓 and 4, 5-benzo make λ〓 red shift, electron with -drawing substituent F, Cl and CF〓 make λ〓 hypsochromic shift; b The W〓 is bigger than relative symmetrical carbocyanines, and the ratio of 0-1＇ and 0-0＇ transition intensity increase with the increase of σ〓; c The absorption and the fluorescence spectra are mirror image, and the λ〓 have a good linear relationship; d The Stokes shift △λ〓 and the Hammett σ〓 constant have a good linear relationship.

研究了染料的光物理性质，①苯环上取代基影响染料的λ〓和摩尔消光系数，相对于H，给电子取代基CH〓、OCH〓、4，5-benzo使λ〓红移，摩尔消光系数减小，吸电子取代基F、Cl、CF〓使λ〓蓝移，摩尔消光系数减小；②化合物吸收峰的半峰宽较相应的对称染料的大，且振动肩部与最大吸收峰的强度比随σ〓增大而增大；③吸收光谱与荧光光谱呈镜像关系，且λ〓与λ〓呈良好的线性关系；④化合物的Stokes位移△λ〓与取代基的Hammett σ〓常数呈线性关系。

A shift model has been established for the first time on the basis of interlayer compensating effect of multilayer thin films, and the shift range of wavelength has been calculated using equal dividing method, the result was co incide with the measured result.

并对设计的滤光片采用对分法计算了它在低温条件下波长的漂移量，计算结果与研制出的滤光片实测结果吻合很好。并成功地将研究结果应用于滤光片的设计，对原设计结果进行了准确的修正，使得最终研制的滤光片在低温下完全满足使用要求。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。