- List
- Wassenaar Arrangement – List of Dual-Use Goods and Technologies – WA-LIST (25) 1
- Corresponding EU entry
- 6A004
a. Optical mirrors (reflectors) as follows:
Technical Note
For the purposes of 6.A.4.a., Laser Induced Damage Threshold (LIDT) is measured according to ISO 21254-1:2011.
a. 1. 'Deformable mirrors' having an active optical aperture greater than 10 mm and having any of the following, and specially designed components therefor:
a. Having all the following:
1. A mechanical resonant frequency of 750 Hz or more; and
2. More than 200 actuators; or
b. A Laser Induced Damage Threshold (LIDT) being any of the following:
1. Greater than 1 kW/cm² using a Continuous Wave "(CW) laser"; or
2. Greater than 2 J/cm² using 20 ns "laser" pulses at 20 Hz repetition rate;
Technical Notes
For the purposes of 6.A.4.a.1.:
1. 'Deformable mirrors' are mirrors having any of the following:
a. A single continuous optical reflecting surface which is dynamically deformed by the application of individual torques or forces to compensate for distortions in the optical waveform incident upon the mirror; or
b. Multiple optical reflecting elements that can be individually and dynamically repositioned by the application of torques or forces to compensate for distortions in the optical waveform incident upon the mirror.
2. 'Deformable mirrors' are also known as adaptive optic mirrors.
a. 2. Lightweight monolithic mirrors having an average "equivalent density" of less than 30 kg/m² and a total mass exceeding 10 kg;
a. 3. Lightweight "composite" or foam mirror structures having an average "equivalent density" of less than 30 kg/m² and a total mass exceeding 2 kg;
Note 6.A.4.a.2. and 6.A.4.a.3. do not apply to mirrors specially designed to direct solar radiation for terrestrial heliostat installations.
a. 4. Mirrors specially designed for beam steering mirror stages specified in 6.A.4.d.2.a. with a flatness of λ/10 or better (λ is equal to 633 nm) and having any of the following:
a. Diameter or major axis length greater than or equal to 100 mm; or
b. Having all of the following:
1. Diameter or major axis length greater than 50 mm but less than 100 mm; and
2. A Laser Induced Damage Threshold (LIDT) being any of the following:
a. Greater than 10 kW/cm² using a "CW laser"; or
b. Greater than 20 J/cm² using 20 ns "laser" pulses at 20 Hz repetition rate;
N.B. For optical mirrors specially designed for lithography equipment, see 3.B.1.
b. Optical components made from zinc selenide (ZnSe) or zinc sulphide (ZnS) with transmission in the wavelength range exceeding 3,000 nm but not exceeding 25,000 nm and having any of the following:
1. Exceeding 100 cm³ in volume; or
2. Exceeding 80 mm in diameter or length of major axis and 20 mm in thickness (depth);
c. "Space-qualified" components for optical systems, as follows:
1. Components lightweighted to less than 20% "equivalent density" compared with a solid blank of the same aperture and thickness;
2. Raw substrates, processed substrates having surface coatings (single-layer or multi-layer, metallic or dielectric, conducting, semiconducting or insulating) or having protective films;
3. Segments or assemblies of mirrors designed to be assembled in space into an optical system with a collecting aperture equivalent to or larger than a single optic 1 m in diameter;
4. Components manufactured from "composite" materials having a coefficient of linear thermal expansion, in any coordinate direction, equal to or less than 5 x 10⁻⁶/K;
d. Optical control equipment as follows:
1. Equipment specially designed to maintain the surface figure or orientation of the "space-qualified" components specified in 6.A.4.c.1. or 6.A.4.c.3.;
2. Steering, tracking, stabilisation and resonator alignment equipment as follows:
a. Beam steering mirror stages designed to carry mirrors having diameter or major axis length greater than 50 mm and having all of the following, and specially designed electronic control equipment therefor:
1. A maximum angular travel of ±26 mrad or more;
2. A mechanical resonant frequency of 500 Hz or more; and
3. An angular "accuracy" of 10 μrad (microradians) or less (better);
b. Resonator alignment equipment having bandwidths equal to or more than 100 Hz and an "accuracy" of 10 μrad or less (better);
d. 3. Gimbals having all of the following:
a. A maximum slew exceeding 5°;
b. A bandwidth of 100 Hz or more;
c. Angular pointing errors of 200 µrad (microradians) or less; and
d. Having any of the following:
1. Exceeding 0.15 m but not exceeding 1 m in diameter or major axis length and capable of angular accelerations exceeding 2 rad (radians)/s²; or
2. Exceeding 1 m in diameter or major axis length and capable of angular accelerations exceeding 0.5 rad (radians)/s²;
d. 4. Not used since 2014
e. 'Aspheric optical elements' having all of the following:
1. Largest dimension of the optical-aperture greater than 400 mm;
2. Surface roughness less than 1 nm (rms) for sampling lengths equal to or greater than 1 mm; and
3. Coefficient of linear thermal expansion's absolute magnitude less than 3x10⁻⁶/K at 25°C;
Technical Notes
1. For the purposes of 6.A.4.e., an 'aspheric optical element' is any element used in an optical system whose imaging surface or surfaces are designed to depart from the shape of an ideal sphere.
2. For the purposes of 6.A.4.e.2., manufacturers are not required to measure the surface roughness unless the optical element was designed or manufactured with the intent to meet, or exceed, the specified parameter.
Note 6.A.4.e. does not apply to 'aspheric optical elements' having any of the following:
a. Largest optical-aperture dimension less than 1 m and focal length to aperture ratio equal to or greater than 4.5:1;
b. Largest optical-aperture dimension equal to or greater than 1 m and focal length to aperture ratio equal to or greater than 7:1;
c. Designed as Fresnel, flyeye, stripe, prism or diffractive optical elements;
d. Fabricated from borosilicate glass having a coefficient of linear thermal expansion greater than 2.5x10⁻⁶/K at 25°C; or
e. An x-ray optical element having inner mirror capabilities (e.g., tube-type mirrors).
N.B. For 'aspheric optical elements' specially designed for lithography equipment, see 3.B.1.
f. Dynamic wavefront measuring equipment having all of the following:
1. 'Frame rates' equal to or more than 1 kHz; and
2. A wavefront accuracy equal to or less (better) than /20 at the designed wavelength.
Technical Note
For the purposes of 6.A.4.f., 'frame rate' is a frequency at which all "active pixels" in the "focal plane array" are integrated for recording images projected by the wavefront sensor optics.
LASERS
Technical Note
For the purposes of 6.A.4.a., Laser Induced Damage Threshold (LIDT) is measured according to ISO 21254-1:2011.
a. 1. 'Deformable mirrors' having an active optical aperture greater than 10 mm and having any of the following, and specially designed components therefor:
a. Having all the following:
1. A mechanical resonant frequency of 750 Hz or more; and
2. More than 200 actuators; or
b. A Laser Induced Damage Threshold (LIDT) being any of the following:
1. Greater than 1 kW/cm² using a Continuous Wave "(CW) laser"; or
2. Greater than 2 J/cm² using 20 ns "laser" pulses at 20 Hz repetition rate;
Technical Notes
For the purposes of 6.A.4.a.1.:
1. 'Deformable mirrors' are mirrors having any of the following:
a. A single continuous optical reflecting surface which is dynamically deformed by the application of individual torques or forces to compensate for distortions in the optical waveform incident upon the mirror; or
b. Multiple optical reflecting elements that can be individually and dynamically repositioned by the application of torques or forces to compensate for distortions in the optical waveform incident upon the mirror.
2. 'Deformable mirrors' are also known as adaptive optic mirrors.
a. 2. Lightweight monolithic mirrors having an average "equivalent density" of less than 30 kg/m² and a total mass exceeding 10 kg;
a. 3. Lightweight "composite" or foam mirror structures having an average "equivalent density" of less than 30 kg/m² and a total mass exceeding 2 kg;
Note 6.A.4.a.2. and 6.A.4.a.3. do not apply to mirrors specially designed to direct solar radiation for terrestrial heliostat installations.
a. 4. Mirrors specially designed for beam steering mirror stages specified in 6.A.4.d.2.a. with a flatness of λ/10 or better (λ is equal to 633 nm) and having any of the following:
a. Diameter or major axis length greater than or equal to 100 mm; or
b. Having all of the following:
1. Diameter or major axis length greater than 50 mm but less than 100 mm; and
2. A Laser Induced Damage Threshold (LIDT) being any of the following:
a. Greater than 10 kW/cm² using a "CW laser"; or
b. Greater than 20 J/cm² using 20 ns "laser" pulses at 20 Hz repetition rate;
N.B. For optical mirrors specially designed for lithography equipment, see 3.B.1.
b. Optical components made from zinc selenide (ZnSe) or zinc sulphide (ZnS) with transmission in the wavelength range exceeding 3,000 nm but not exceeding 25,000 nm and having any of the following:
1. Exceeding 100 cm³ in volume; or
2. Exceeding 80 mm in diameter or length of major axis and 20 mm in thickness (depth);
c. "Space-qualified" components for optical systems, as follows:
1. Components lightweighted to less than 20% "equivalent density" compared with a solid blank of the same aperture and thickness;
2. Raw substrates, processed substrates having surface coatings (single-layer or multi-layer, metallic or dielectric, conducting, semiconducting or insulating) or having protective films;
3. Segments or assemblies of mirrors designed to be assembled in space into an optical system with a collecting aperture equivalent to or larger than a single optic 1 m in diameter;
4. Components manufactured from "composite" materials having a coefficient of linear thermal expansion, in any coordinate direction, equal to or less than 5 x 10⁻⁶/K;
d. Optical control equipment as follows:
1. Equipment specially designed to maintain the surface figure or orientation of the "space-qualified" components specified in 6.A.4.c.1. or 6.A.4.c.3.;
2. Steering, tracking, stabilisation and resonator alignment equipment as follows:
a. Beam steering mirror stages designed to carry mirrors having diameter or major axis length greater than 50 mm and having all of the following, and specially designed electronic control equipment therefor:
1. A maximum angular travel of ±26 mrad or more;
2. A mechanical resonant frequency of 500 Hz or more; and
3. An angular "accuracy" of 10 μrad (microradians) or less (better);
b. Resonator alignment equipment having bandwidths equal to or more than 100 Hz and an "accuracy" of 10 μrad or less (better);
d. 3. Gimbals having all of the following:
a. A maximum slew exceeding 5°;
b. A bandwidth of 100 Hz or more;
c. Angular pointing errors of 200 µrad (microradians) or less; and
d. Having any of the following:
1. Exceeding 0.15 m but not exceeding 1 m in diameter or major axis length and capable of angular accelerations exceeding 2 rad (radians)/s²; or
2. Exceeding 1 m in diameter or major axis length and capable of angular accelerations exceeding 0.5 rad (radians)/s²;
d. 4. Not used since 2014
e. 'Aspheric optical elements' having all of the following:
1. Largest dimension of the optical-aperture greater than 400 mm;
2. Surface roughness less than 1 nm (rms) for sampling lengths equal to or greater than 1 mm; and
3. Coefficient of linear thermal expansion's absolute magnitude less than 3x10⁻⁶/K at 25°C;
Technical Notes
1. For the purposes of 6.A.4.e., an 'aspheric optical element' is any element used in an optical system whose imaging surface or surfaces are designed to depart from the shape of an ideal sphere.
2. For the purposes of 6.A.4.e.2., manufacturers are not required to measure the surface roughness unless the optical element was designed or manufactured with the intent to meet, or exceed, the specified parameter.
Note 6.A.4.e. does not apply to 'aspheric optical elements' having any of the following:
a. Largest optical-aperture dimension less than 1 m and focal length to aperture ratio equal to or greater than 4.5:1;
b. Largest optical-aperture dimension equal to or greater than 1 m and focal length to aperture ratio equal to or greater than 7:1;
c. Designed as Fresnel, flyeye, stripe, prism or diffractive optical elements;
d. Fabricated from borosilicate glass having a coefficient of linear thermal expansion greater than 2.5x10⁻⁶/K at 25°C; or
e. An x-ray optical element having inner mirror capabilities (e.g., tube-type mirrors).
N.B. For 'aspheric optical elements' specially designed for lithography equipment, see 3.B.1.
f. Dynamic wavefront measuring equipment having all of the following:
1. 'Frame rates' equal to or more than 1 kHz; and
2. A wavefront accuracy equal to or less (better) than /20 at the designed wavelength.
Technical Note
For the purposes of 6.A.4.f., 'frame rate' is a frequency at which all "active pixels" in the "focal plane array" are integrated for recording images projected by the wavefront sensor optics.
LASERS