Lens position adjusting mechanism for optical system

Abstract

The invention discloses a lens position adjusting mechanism for an optical system. The lens position adjusting mechanism comprises an objective lens, a flat lens fixing seat, an axicon fixing seat, anouter sleeve and an axicon adjusting sleeve, and one end of the outer sleeve is axially limited and connected with the end part of the objective lens, the inner wall of the outer sleeve is in threaded connection with the outer wall of the flat lens fixing seat, the other end of the flat lens fixing seat is fixedly connected with one end of the axicon adjusting sleeve, the inner wall of the axiconadjusting sleeve is in threaded connection with the outer wall of the axicon fixing seat, a first flat key structure is arranged between the outer sleeve and the flat lens fixing seat, a second flatkey structure is arranged between the axicon adjusting sleeve and the axicon fixing seat, the end part of the objective lens is fixedly connected with one end of the first flat key structure, and theother end of the axicon adjusting sleeve is axially limited and connected with the second flat key structure. The lens position adjusting mechanism is compact in structure, the adjusting of the relative position of an internal optical lens can be realized only by adjusting the outer sleeve and rotating an adjusting knob, and the adjusting is simple and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of adjustment of precision optical systems in the laser processing industry, and in particular relates to a lens position adjustment mechanism for the optical system, which can realize arbitrary adjustment of the relative distance between the lenses and the lenses in a closed environment. Background technique [0002] like figure 1 The optical path diagram shown is a common optical path design in an optical system. The optical path diagram includes an axicon lens, two flat lenses and a set of objective lenses. In actual use, it is necessary to ensure the distance between the axicon lens and the flat lens as a whole relative to the objective lens. Adjustable, and secondly, the distance between the axicon lens and the plano lens also needs to be adjustable. In this optical path diagram, the adjustment of the distance between the objective lens and the flat lens is still sensitive to the effect of focusing, an...

AI Technical Summary

Problems solved by technology

In this optical path diagram, the adjustment of the distance between the objective lens and the flat lens is still sensitive to the effect of focusing, and the diameter of the spot is only Compared with the distance adjustment between the axicon lens and the flat lens, the sensitivity requirement is lower, as long as the center of the laser circle deviates slightly, it will cause a large loss of laser energy

[0003] At present, in order to achieve better focusing and precise machining and cutting, the distance between lenses is adjusted through a cage system structure (combined with guide rods, mirror frames, etc.), but this method has certain limitations. Disadvantages: First, the cage system is an open structure, and the external dust is easy to damage the optical system, which is difficult to clean and is not conducive to the maintenance of the optical system; second, there is no benchmark for the assembly of the cage system, and it is impossible to do it during debugging Precise and continuous adjustment of the relative position between the lens and the lens, between the lens and the objective lens

The existing cage system structure has been difficult to meet the requirements of [dust-free] and [precise and continuous adjustment]

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