硒化锌（ZnSe（�/span>ATR棱镜

ZnSe在红外元器件窗片透镜以及光谱分析ATR棱镜领域有着广泛的应用。硒化锌(Zinc Selenide)对于CO₂激光器的元器件也是一种良好的选择。在二氧化碳激光器工作的波殴�/span>10.6 microns附近有着良好的透射率。硒化锌材料是一种黄色透明的多晶材斘�/span>�结晶颗粒大小约为70��m�透光范围0.5-15��m。由化学气相沉积(CVD)方法合成的基本不存在杂质吸收�散射损失极低。由于对10.6��m波长光的吸收很小�因此成为制作高功玆�/span>CO₂激光器系统中光学器件的**材料、�/span>此外在其整个透光波段冄�/span>�也是在不同光学系统中所普遍使用的材料、�/span>

硒化锌材料对热冲击具有很高的承受能力�使它成为高功玆�/span>CO₂激光器系统中的**光学材料。硬度只是多光谱�?/span>ZnS皃�/span>2/3�材质较软易产生划痔�/span>�而且材料折射率较�?/span>�所以需要在其表面镀制高硬度减反射膜来加以保护并获得较高的透过率。在其常用光谱范围内�散射很低。在用做高功率激光器件时�需要严格控制材料的体吸收和内部结构缺陷�并采�?小破坏程度的抛光技术和**光学质量的镀膜工艺、�/span>

广泛应用于激先�/span>＋�span>医学，天文学和红外夜视等领域中、�/span>

参数详细信息９�/span>

透射波段范围:	0.6 to 21.0um
折射率：	2.4028 at 10.6um
反射损耗：	29.1% at 10.6um (2 surfaces)
吸收系数９�/span>	0.0005 cm-1at 10.6um
吸收峰：	45.7um
dn/dT :	+61 x 10-6/ℂ�/span>at 10.6um at 298K
dn/du= 0 :	5.5um
密度９�/span>	5.27 g/cc
熔点９�/span>	1525ℂ�/span>(see notes below)
导热系数９�/span>	18 W m-1K-1at 298K
热膨胀９�/span>	7.1 x 10-6/ℂ�/span>at 273K
硬度:	Knoop 120 with 50g indenter
比热容量 :	339 J Kg-1K-1
Dielectric Constant :	n/a
Youngs Modulus (E) :	67.2 GPa
Shear Modulus (G) :	n/a
Bulk Modulus (K) :	40 GPa
弹性系�?/span>:	Not Available
Apparent Elastic Limit :	55.1 MPa (8000 psi)
泊松� :	0.28
Solubility :	0.001g/100g water
Molecular Weight :	144.33
Class/Structure :	HIP polycrystalline cubic� ZnS� F43m

No = Ordinary Ray

��m	No	��m	No	��m	No
0.54	2.6754	0.58	2.6312	0.62	2.5994
0.66	2.5755	0.7	2.5568	0.74	2.5418
0.78	2.5295	0.82	2.5193	0.86	2.5107
0.90	2.5034	0.94	2.4971	0.98	2.4916
1.0	2.4892	1.4	2.4609	1.8	2.4496
2.2	2.4437	2.6	2.4401	3.0	2.4376
3.4	2.4356	3.8	2.4339	4.2	2.4324
4.6	2.4309	5.0	2.4295	5.4	2.4281
5.8	2.4266	6.2	2.4251	6.6	2.4235
7.0	2.4218	7.4	2.4201	7.8	2.4183
8.2	2.4163	8.6	2.4143	9.0	2.4122
9.4	2.4100	9.8	2.4077	10.2	2.4053
10.6	2.4028	11.0	2.4001	11.4	2.3974
11.8	2.3945	12.2	2.3915	12.6	2.3883
13.0	2.3850	13.4	2.3816	13.8	2.3781
14.2	2.3744	14.6	2.3705	15.0	2.3665
15.4	2.3623	15.8	2.3579	16.2	2.3534
16.6	2.3487	17.0	2.3438	17.4	2.3387
17.8	2.3333	18.2	2.3278

订购信息９�/span>

产品型号	规格	外形	材料等级
ZNSEPRISM42-14-2-45	42 x 14 x 2mm 45�� ATR	梯形	IR Polished
ZNSEPRISM50-20-2-30	50 x 20 x 2mm 30�� ATR	梯形	IR Polished
ZNSEPRISM52-20-2-45	52 x 20 x 2mm 45�� ATR	梯形	IR Polished
ZNSEPRISM52-20-2-60	52 x 20 x 2mm 60�� ATR	梯形	IR Polished
ZNSEPRISM60-12-4-45P	60 x 12 x 4mm 45�� ATR	梯形	IR Polished
ZNSEPRISM60-15-3-30	60 x 15 x 3mm 30�� ATR	梯形	IR Polished
ZNSEPRISM60-15-3-45	60 x 15 x 3mm 45�� ATR	梯形	IR Polished
ZNSEPRISM60-15-3-60	60 x 15 x 3mm 60�� ATR	梯形	IR Polished
ZNSEPRISM68-10-6-45	68 x 10 x 6mm 45�� ATR	梯形	IR Polished

示例９�/span>ZNSEPRISM50-20-2-30

关于晶体切割９�/span>

During Chemical Vapour Deposition the small crystallite grains align with thedirection of growth� and are

normal to the thickness of the sheet produced. For windows of normal thickness and aspect ratios the alignmentof the grain therefore is rarely a problem as they are cut from the grown sheet such that within an optical windowthe grains align perpendicular to the surfaces. This is optimum orientation for lowest internal absorption andscatter.

With prisms� the cutting direction requires more consideration. It isrecommended that the thickness of the stripmaterial corresponds to the apex height of the prism. This ensures optimum crystallite orientation for most usual

prism applications.

For typical 45�� prisms the most obvious use of material is shown in (A) but it

should be noted that this is not the optimum orientation.

The best choice is (B) and it also permitsa higher limit on prism size orconverselyallows thinner stock to be used. There iswaste at the ends of the strip but this issmall and so it may not be quite aseconomic as (A).

Cutting in direction (C) where the entire light beam runs at 90�� to the grain

structure should be avoided completely if at all possible.Note that maximum available thickness of ZnSe and ZnS (FLIR) is approximately 60mm. Maximum availablethickness of ZnS Cleartran is approximately 30mm