OPTICAL SYSTEM OF ELECTRONIC-OPTICAL TACHOMETER Russian patent published in 1997 - IPC

FIELD: optical systems of geodetic instruments. SUBSTANCE: objective lenses of receiving and observation channels of tachometer are manufactured in the form of one objective and objective lens of transmitting channel is mounted for inclination and crossing bu its optical axis of optical axis of objective lenses of receiving and observation channels in axial point of plane of objects in step with movement of focusing lens of telescope. Light splitting cube-prism placed for possible optical matching of photodetector and image plane of telescope is set in front of telescope. Focusing lens of telescope can be kinematically coupled to template manufactured in the form of truncated cone with helical guiding groove in its forming surface with which spring-loaded rest of rocker kinematically coupled to transmitting objective contacts. EFFECT: increased functional reliability and accuracy of tachometer. 1 cl, 1 dwg