Images for checking optical systems (accuracy class 1, chrome on glass)
Model Overall dimension Field size Active area Deviation
OKO 33-0.2 33 x 26 0.2 15 x 13 0.002
OKO 66-1.35 66 x 52 1.35 31 x 24 0.002
OKO 107-2.2 107 x 83 2.2 105 x 73 0.002
OKO 180-3 180 x 140 3 170 x 140 0.002
OKO 300-4 300 x 240 4 260 x 200 0.002

High-precision images for testing and adjusting optical systems. Chess board. Accuracy class - 1 (deviation up to 3 microns). Material: chrome on glass. Sizes from 30 x 30 mm to 300x300 mm. Specify details.