Sensors and Lasers
d. 4. Not used since 2014 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;
| Reference | Parameter | Threshold |
|---|---|---|
| 6A004 | d. 4. Not used since 2014 1. Largest dimension of the optical-aperture | > 400 mm |
| 6A004 | 2. Surface roughness less than 1 nm (rms) for sampling lengths equal to or | > 1 mm |
| 6A004 | 2. Surface roughness less than 1 nm (rms) for sampling lengths | >= 1 mm |
| 6A004 | 2. Surface roughness | < 1 nm |
| 6A004 | and 3. Coefficient of linear thermal expansion's absolute magnitude | < 3 x |
| 6A004.a.1 | ‘Deformable mirrors’ having an active optical aperture | > 10 mm and |
| 6A004.a.1.b.1 | > 1 kW/ cm | |
| 6A004.a.1.b.2 | > 2 J/ cm | |
| 6A004.a.2 | equivalent density" of less than 30 kg/m^2 and a total mass | > 10 kg |
| 6A004.a.2 | onolithic mirrors having an average "equivalent density" of | < 30 kg/m |
| 6A004.a.3 | equivalent density" of less than 30 kg/m^2 and a total mass | > 2 kg |
| 6A004.a.3 | mirror structures having an average "equivalent density" of | < 30 kg/m |
| 6A004.a.4.b | ving all of the following: 1. Diameter or major axis length | > 50 mm but |
| 6A004.a.4.b | uced Damage Threshold (LIDT) being any of the following: a. | > 10 kW/cm |
| 6A004.a.4.b | or b. | > 20 J/cm |
| 6A004.a.4.b | ng: 1. Diameter or major axis length greater than 50 mm but | < 100 mm |
| 6A004.b.1 | > 100 cm | |
| 6A004.b.2 | > 80 mm in | |
| 6A004.d.2.a | igned to carry mirrors having diameter or major axis length | > 50 mm and |
| 6A004.d.2.b | Resonator alignment equipment having bandwidths | >= 100 Hz |
| 6A004.d.3 | Gimbals having all of the following: a. A maximum slew | > 5 o |
| 6A004.d.3 | and d. Having any of the following: 1. | > 015 m but |
| 6A004.d.3 | 15 m but not | > 1 m in |
| 6A004.d.3 | r or major axis length and capable of angular accelerations | > 2 rad (radians) |
| 6A004.d.3 | r or major axis length and capable of angular accelerations | > 05 rad (radians) |
| 6A004.d.3 | 15 m but | <= 1 m |
| 6A004.e | the following: 1. Largest dimension of the optical-aperture | > 400 mm |
| 6A004.e | hness less than 1 nm (rms) for sampling lengths equal to or | > 1 mm |
| 6A004.e | Surface roughness less than 1 nm (rms) for sampling lengths | >= 1 mm |
| 6A004.e | 2. Surface roughness | < 1 nm |
| 6A004.f | ing equipment having all of the following: 1. ‘Frame rates’ | >= 1 kHz |
6A004.aOptical mirrors (reflectors) as follows:
6A004.a.1‘Deformable mirrors’ having an active optical aperture greater than 10 mm and having any of the following, and specially designed components therefor,
6A004.a.1.aHaving all the following: 1. A mechanical resonant frequency of 750 Hz or more; and 2. More than 200 actuators; or
6A004.a.1.bA Laser Induced Damage Threshold (LIDT) being any of the following:
6A004.a.1.b.1Greater than 1 kW/ cm^2 using a "CW laser"; or
6A004.a.1.b.2Greater than 2 J/ cm^2 using 20 ns "laser" pulses at 20 Hz repetition rate;
6A004.a.2Lightweight monolithic mirrors having an average "equivalent density" of less than 30 kg/m^2 and a total mass exceeding 10 kg;
6A004.a.3Lightweight "composite" or foam mirror structures having an average "equivalent density" of less than 30 kg/m^2 and a total mass exceeding 2 kg;
6A004.a.4Mirrors specially designed for beam steering mirror stages specified in 6A004.d.2.a. with a flatness of λ/10 or better (λ is equal to 633 nm)and having any of the following:
6A004.a.4.aDiameter or major axis length greater than or equal to 100 mm; or
6A004.a.4.bHaving 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/cm^2 using a "CW laser"; or b. Greater than 20 J/cm^2 using 20 ns "laser" pulses at 20 Hz repetition rate;
6A004.bOptical 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:
6A004.b.1Exceeding 100 cm^3 in volume; or
6A004.b.2Exceeding 80 mm in diameter or length of major axis and 20 mm in thickness (depth);
6A004.c"Space-qualified" components for optical systems, as follows:
6A004.c.1Components lightweighted to less than 20 % "equivalent density" compared with a solid blank of the same aperture and thickness;
6A004.c.2Raw substrates, processed substrates having surface coatings (single-layer or multi-layer, metallic or dielectric, conducting, semiconducting or insulating) or having protective films;
6A004.c.3Segments 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;
6A004.c.4Components manufactured from "composite" materials having a coefficient of linear thermal expansion, in any coordinate direction, equal to or less than 5 × 10^–6/K;
6A004.dOptical control equipment as follows:
6A004.d.1Equipment specially designed to maintain the surface figure or orientation of the "space-qualified" components specified in 6A004.c.1. or 6A004.c.3.;
6A004.d.2Steering, tracking, stabilisation and resonator alignment equipment as follows:
6A004.d.2.aBeam 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:
6A004.d.2.a.1A maximum angular travel of ± 26 mrad or more;
6A004.d.2.a.2A mechanical resonant frequency of 500 Hz or more; and
6A004.d.2.a.3An angular "accuracy" of 10 μrad (microradians) or less (better);
6A004.d.2.bResonator alignment equipment having bandwidths equal to or more than 100 Hz and an "accuracy" of 10 μrad or less (better);
6A004.d.3Gimbals having all of the following: a. A maximum slew exceeding 5o; 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)/s^2;
6A004.d.4Not used
6A004.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 3 × 10^–6/K at 25 °C.
6A004.fDynamic 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 λ/20 at the designed wavelength.
Decontrol note
Les miroirs et composants optiques destinés exclusivement à des applications civiles courantes (par exemple, équipements médicaux standards ou instruments scientifiques non spatiaux) peuvent être exemptés, sous réserve d'une justification claire de leur usage final civil.
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