硒化锌分光镜
参数指标我要纠错



参数详细信息：

透射波段范围 :

0.6 to 21.0 um

折射率：

2.4028 at 10.6 um

反射损耗：

29.1% at 10.6 um (2 surfaces)

吸收系数：

0.0005 cm-1at 10.6 um

吸收峰：

45.7 um

dn/dT :

    +61 x 10-6/℃ at 10.6 um at 298K

dn/du = 0 :

5.5 um

密度：

5.27 g/cc

熔点：

1525℃ (see notes below)

导热系数：

18 W m-1 K-1at 298K

热膨胀：

7.1 x 10-6/℃at 273K

硬度 :

Knoop 120 with 50g indenter

比热容量 :

339 J Kg-1聽K-1

Dielectric Constant :

n/a

Youngs Modulus (E) :

67.2 GPa

Shear Modulus (G) :

n/a

Bulk Modulus (K) :

40 GPa

弹性系数 :

Not Available

Apparent Elastic Limit :

55.1 MPa (8000 psi)

泊松比 :

0.28

Solubility :

0.001g/100g water

Molecular Weight :

144.33

Class/Structure :

HIP polycrystalline cubic, ZnS, F43m

No = Ordinary Ray

μm   

No

μm   

No

μm   

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







关于晶体切割：

During Chemical Vapour Deposition the small crystallite grains align with the direction of growth, and are

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

With prisms, the cutting direction requires more consideration. It is recommended that the thickness of the strip material 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 permits a higher limit on prism size or conversely allows thinner stock to be used. There is waste at the ends of the strip but this is small and so it may not be quite as economic 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 available thickness of ZnS Cleartran is approximately 30mm


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