| 摘要 |
FIELD: measurement technology; optical industry. SUBSTANCE: parallel beam of optical radiation is generated and directed to optical system. Then spatial position of the beam is fixed at the output of the system, and preset shift is introduced into the beam transmitted. Focal length is determined from new position of the beam at output of the system. Device for realizing method has radiation source, unit for forming parallelism of radiation, optical item in form of an optical wedge mounted for motion in perpendicular to optical axis, system tested, optical device for measuring spatial characteristics of the radiation source. EFFECT: improved precision of measurement. 2 cl, 1 dwg |
