Athermalization laser emission lens

Abstract

The invention belongs to the field of laser ranging, and provides an athermalization laser emission optical lens. The lens solves the problems that an existing laser emission system is sensitive to the environment temperature, so the ranging capacity or damage capacity is reduced, and during distance focusing, the control precision of a focusing structure is increased. The lens comprises a first lens body, a second lens body, a third lens body and a fourth lens body which are sequentially and coaxially arranged; the first lens body, the second lens body, the third lens body and the fourth lensbody are respectively a biconcave lens body with negative focal power, a biconvex lens body with positive focal power, a meniscus lens body with positive focal power and bent to the side of a laser,and a biconvex lens body with positive focal power; the first lens body and the fourth lens body are made of quartz silica glass; the second lens body and the third lens body are made of crown flint H-FK61 glass; and the third lens body can move back and forth along the direction of an optical axis to realize laser emission lens focal plane offset compensation under different operating distances.The lens is provided with only four lenses body, the two materials of quartz silica glass and crown flint H-FK61 glass are used in pairs, and athermalization design of the system is achieved in the whole distance focusing range.

Description

technical field [0001] The invention belongs to the field of laser ranging, and relates to a laser emitting lens, in particular to an athermalized laser emitting lens. Background technique [0002] With the continuous development of optoelectronic equipment in the field of low-altitude defense, real-time laser ranging or laser damage is required, and the laser emission system needs to be integrated on the airborne or vehicle. Therefore, the laser emission system also needs to adapt to the airborne or vehicle environment. One of the key factors is temperature adaptability. [0003] Existing laser emission systems generally have a narrow range of wavelengths, and a single glass material or two glass materials are usually used in the design. The system’s heat dissipation capability is poor, which makes the system more sensitive to temperature changes. In order to adapt to temperature changes, real-time Adjusting the focus greatly reduces the ranging capability or damage effect...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems that the existing laser emitting system is more sensitive to the ambient temperature, resulting in a decline in ranging capability or damage capability, and increasing the control accuracy of the focusing structure during distance focusing, the present invention provides an athermalized laser emitting lens

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