The invention discloses a high accuracy use mutual orthogonal two double frequencies
laser interferometer
optics angle gauge testing marking apparatus, which includes controlled computer 1,
double frequency laser interferometer A3 and rays direction 2,the static reflector 4 and the motion reflector 7 of placed in turn according to light path direction,
double frequency laser interferometer B13 which mutually vertical laying aside with
double frequency laser interferometer A3 rays path, the long baseline spectroscope 11, the long baseline reflector 6, the
optical path compensate parallel glass plate 5 and the measured photometry
angle gauge 9 which in turn placed according to the double frequency laser interferometer B13 light path, and also includes migration precise translation 8, small rotation precise
angular displacement 10 and step
motor control box 12 of making the measured optic
angle gauge 9 along the main section direction move. The invention has the following remarkable merit: through the invention installment survey
optics angle gauge angle of deviation in 2'-10'survey scope, the measuring accuracy may achieve 0.02', enormously increased
optics angle gauge angle of deviation angular accuracy. Uses the mutual orthogonal double frequency laser interferometer take a bearing, reduced the optical material
refractive index and the interference fringe interprets and so on other factors influence to take a bearing precision.