6A004 Optics.
License Requirements
Reason for Control: NS, AT
Control(s) Country Chart
NS applies to entire entry NS Column 2
AT applies to entire entry AT Column 1
License Requirement Notes: See §743.1 of
the EAR for reporting requirements for exports
under License Exceptions.
License Exceptions
LVS: $3000
GBS: Yes for 6A004.a.1, a.2, a.4, b, d.2,
and d.4
CIV: Yes for 6A004.a.1, a.2, a.4, b, d.2,
and d.4
List of Items Controlled
Unit: Equipment in number; cable in
meters/feet; components in $ value
Related Controls: "Space qualified"
components for optical systems defined in
6A004.c and optical control equipment
defined in 6A004.d.1 are subject to the export
licensing authority of the Department of State,
Directorate of Defense Trade Controls (22
CFR part 121). See also 6A994
Related Definitions: N/A
Items:
a. Optical mirrors (reflectors), as follows:
a.1. "Deformable mirrors" having either
continuous or multi-element surfaces, and
specially designed components therefor, capable
of dynamically repositioning portions of the
surface of the mirror at rates exceeding 100 Hz;
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;
a.4. Beam steering mirrors more than 100 mm
in diameter or length of major axis, that maintain a
flatness of lambda/2 or better (lambda is equal to
633 nm) having a control bandwidth exceeding 100
Hz.
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:
b.1. Exceeding 100 cm3 in volume; or
b.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:
c.1. Lightweighted to less than 20%
"equivalent density" compared with a solid blank
of the same aperture and thickness;
c.2. Substrates, substrates having surface
coatings (single-layer or multi-layer, metallic or
dielectric, conducting, semiconducting or
insulating) or having protective films;
c.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;
c.4. Manufactured from "composite" materials
having a coefficient of linear thermal expansion
equal to or less than 5 x 10-6 in any coordinate
direction.
d. Optical control equipment, as follows:
d.1. Specially designed to maintain the
surface figure or orientation of the
"space-qualified" components controlled by
6A004.c.1 or 6A004.c.3;
d.2. Having steering, tracking, stabilization or
resonator alignment bandwidths equal to or more
than 100 Hz and an accuracy of 10 ærad
(microradians) or less;
d.3. Gimbals having all of the following:
d.3.a. A maximum slew exceeding 5ø;
d.3.b. A bandwidth of 100 Hz or more;
d.3.c. Angular pointing errors of 200
ærad (microradians) or less; and
d.3.d. Having any of the following:
d.3.d.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
d.3.d.2. Exceeding 1 m in diameter or
major axis length and capable of angular
accelerations exceeding 0.5 rad (radians)/s2;
d.4. Specially designed to maintain the
alignment of phased array or phased segment
mirror systems consisting of mirrors with a
segment diameter or major axis length of 1 m or
more.
e. Aspheric optical elements having all of the
following characteristics:
e.1. The largest dimension of the optical-
aperture is greater than 400 mm;
e.2. The surface roughness is less than 1 nm
(rms) for sampling lengths equal to or greater than
1 mm; and
e.3. The coefficient of linear thermal
expansion's absolute magnitude is less than
3 x 10-6/K at 25ø C;
Technical Notes:
1. 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. Manufacturers are not required to
measure the surface roughness listed in 6A004.e.2
unless the optical element was designed or
manufactured with the intent to meet, or exceed,
the control parameter.
Note: 6A004.e does not control aspheric
optical elements having any of the following:
a. A largest optical-aperture dimension less
than 1 m and a focal length to aperture ratio equal
to or greater than 4.5:1;
b. A largest optical-aperture dimension equal
to or greater than 1 m and a focal length to
aperture ratio equal to or greater than 7:1;
c. Being designed as Fresnel, flyeye, stripe,
prism or diffractive optical elements;
d. Being fabricated from borosilicate glass
having a coefficient of linear thermal expansion
greater than 2.5 x 10-6/K at 25ø C;or
e. Being an x-ray optical element having inner
mirror capabilities (e.g., tube-type mirrors).
N.B.: For aspheric optical elements specially
designed for lithographic equipment, see 3B001.