6B004 Category 6B

Optical equipment, as follows (see List of Items Controlled).

Category 6: Sensors and Lasers

Reasons for control

Control	Column
AT applies to entire entry	AT 1
NS applies to entire entry	NS 2

Exception	As stated in the entry
GBS	Yes for 6B004.b
LVS	$5000

Items: a. Equipment for measuring absolute reflectance to an “accuracy” of equal to or better than 0.1% of the reflectance value;
b. Equipment other than optical surface scattering measurement equipment, having an unobscured aperture of more than 10 cm, “specially designed” for the non-contact optical measurement of a non-planar optical surface figure (profile) to an “accuracy” of 2 nm or less (better) against the required profile.

This entry does not control microscopes.

Source: eCFR, version 2026-08-01, retrieved 2026-08-20T04:04:59+00:00.