DEVICE FOR TEST OF LENSES Russian patent published in 2006 - IPC G01M11/02 

FIELD: test engineering.

SUBSTANCE: device comprises light source, ruling target with spatial frequency N_i, collimator lens, and means for processing and receiving information from the photosensitive area of the matrix element of the TV camera, which are arranged along a single optical axis. The ruling target is provided with the mechanism for moving perpendicular to the optical axis and is positioned in the focal plane of the lens to be tested. The photosensitive area of the TV camera matrix is mounted in the focal plane of the collimator lens whose focus distance should be f_c ≥ 6pN_if_l, where f_c is the focus distance of the collimator lens, mm, f_l is the focus distance of the lens to be tested, mm, p is the size of the pixel of the photosensitive matrix, mm (p ≈ 0.006 mm), and N_i is the spatial frequency, r/mm.

EFFECT: simplified design and enhanced precision.

3 cl, 1 dwg