Three-group linkage shooting integrated optical structure

Abstract

The invention relates to the technical field of photoelectricity, in particular to a three-group linkage shooting and lighting integrated optical structure which comprises a front lens group, a firstzooming group, a second zooming group, a compensation group, a rear fixing group, a reverse scanning mirror, a reflecting mirror and a color filter switching assembly which are arranged successively arranged from left to right along the light incident direction, the color filter switching assembly is arranged in the left side of an imaging target, the point-to-point corresponding relation betweenair intervals and focal length changes among the first zooming group, the second zooming group and the compensation group is converted into a cam curve, and the reverse scanning mirror is arranged atthe rear portions of the two gluing groups of the parallel light path rear fixing group for scanning and imaging. The optical mechanism realizes continuous change of focal length, does not need automatic focusing, realizes whole-course continuous high-definition imaging, and has the characteristics of large target surface, wide spectrum band, high resolution, compact volume, wide temperature application range and the like.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to an integrated optical structure with three groups of linkage photography. Background technique [0002] Conventional zoom lenses generally use two-element zoom, that is, a zoom group and a compensation group, but there is a problem that the zoom factor is limited, especially when the size of the imaging target surface is relatively large, the multiple is more difficult and limited. Because the chromatic aberration of magnification is difficult to correct, the modulation transfer function of the off-axis field of view is generally low, which can only be applied to detectors with large pixel sizes, and cannot match small pixel high-resolution detectors. Another implementation is multi-element zoom. Each moving element needs to be driven by a corresponding motor, and one of the elements needs to be autofocused to compensate for the image plane offset caused by temperature ch...

AI Technical Summary

Problems solved by technology

When used in special occasions, such as the military field, it is necessary to quickly track the target, and the auto focus takes a long time, which is difficult to meet the needs of fast tracking, fast positioning, and continuous tracking

At present, the high-definition large-target continuous zoom system, due to the large field of view at the short-focus end and the need to correct off-axis chromatic aberration, still has the problem of excessive axial and radial dimensions, which cannot meet the needs of compactness

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