An off-axis, focusless, multi-band adaptive laser emission system

Abstract

This invention relates to the field of laser ranging optics, and discloses an off-axis, focusless, multi-band adaptive laser emission system, comprising a multi-band laser, a folded-axis optical path assembly, an emitting negative lens assembly, an off-axis Reflective-C-Reflective Optical System, a laser beam splitter assembly, a monitoring camera assembly, and a back-reflection calibration assembly. The system employs an off-axis Reflective-C-Reflective Optical Structure, with an emitting negative lens positioned at the laser incident end, forming a focusless beam-expanding structure with the off-axis Reflective-C system, achieving laser beam expansion and beam divergence angle compression. The laser beam splitter structure allows the emitting and monitoring optical paths to share the same main optical system, and by adjusting the axial position of the emitting negative lens, it compensates for focal shifts in different bands and adjusts the beam divergence angle to adapt to laser ranging requirements for different target distances. This invention offers advantages such as unobstructed emission, multi-band compatibility, and adaptive beam divergence angle adjustment, improving long-distance laser transmission efficiency and ranging accuracy.

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