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Paragraph 6C Equipment, Assemblies and Components

Changes not yet applied. Later legislation changes this provision in ways not yet written into the text below:

Materials

6C002

Optical Sensors:

a.

Elemental tellurium (Te) of purity levels equal to or more than 99.9995%;

b.

Single crystals of cadmium telluride (CdTe), cadmium zinc telluride (CdZnTe) or mercury cadmium telluride (HgCdTe) of any purity level, including epitaxial wafers thereof;

c.

Optical fibre preforms specially designed for the manufacture of high birefringence fibres specified in sub-head d.3. of entry 6A002.

6C004

Optics:

a.

Zinc selenide (ZnSe) and zinc sulphide (ZnS) substrate blanks produced by the chemical vapour deposition process:

1.

Larger than 100 cm3 in volume; or

2.

Larger than 80 mm in diameter with a thickness equal to or more than 20 mm;

b.

Boules of the following electro-optic materials:

1.

Potassium titanyl arsenate (KTA);

2.

Silver gallium selenide (AgGaSe2); or

3.

Thallium arsenic selenide (Tl3AsSe3, also known as TAS);

c.

Non-linear optical materials having:

1.

Third order susceptibility (chi 3) equal to or less than 1 W/m2; and

2.

A response time of less than 1 ms;

d.

Substrate blanks of silicon carbide or beryllium beryllium (Be/Be) deposited materials exceeding 300 mm in diameter or major axis length;

e.

Low optical absorption materials, as follows:

1.

Bulk fluoride compounds containing ingredients with a purity of 99.999% or better;

  • Note: Sub-head e.1. of this entry specifies fluorides of zirconium or aluminium and variants.

2.

Bulk fluoride glass made from compounds specified in sub-head e.1. of this entry;

f.

Glass, including fused silica, phosphate glass, fluorophosphate glass, zirconium fluoride (ZrF4) and hafnium fluoride (HfF4) with:

1.

A hydroxyl ion (OH—) concentration of less than 5 ppm;

2.

Integrated metallic purity levels of less than 1 ppm; and

3.

High homogeneity (index of refraction variance) less than 5 × 10−6;

g.

Synthetically produced diamond material with an absorption of less than 10−5 cm−1 for wavelengths exceeding 200 nm but not exceeding 14,000 nm;

h.

Optical fibre preforms made from bulk fluoride compounds containing ingredients with a purity of 99.999% or better, specially designed for the manufacture of fluoride fibres specified in head f. of entry 6A004.

6C005

Synthetic crystalline laser host material in unfinished form, as follows:

a.

Titanium doped sapphire;

b.

Alexandrite.