LCoS-based adaptive zoom projection objective lens

Abstract

The invention discloses an LCoS-based adaptive zoom projection objective lens. The projection objective lens comprises a solid lens I, an adaptive lens I, an adaptive lens II, an adaptive lens III, asolid lens II and a solid lens III, wherein the solid lenses serve as a main part of the optical power of an optical system, and the adaptive lenses serve as a zoom part and correct an aberration. Thethree adaptive lenses form a lens set and are located between the solid lenses; and the focal length of the whole projection objective lens is changed by changing the focal lengths of the adaptive lenses, so that the size of a projection image is adjusted.

Description

technical field [0001] The present invention relates to an adaptive zoom objective lens, more specifically, the present invention relates to an adaptive zoom projection objective lens based on LCoS. Background technique [0002] LCoS (Liquid Crystal on Silicon, liquid crystal on silicon) projection technology is a reflective projection technology developed on the basis of LCD (Liquid Crystal Display, liquid crystal display), it is compatible with LCD and DLP (Digital Light Processing, digital light processing ) technology has the characteristics of high aperture ratio, high resolution and small volume. Based on the above characteristics, LCoS projection technology is widely used in the design of micro projectors. Compared with traditional projectors, the biggest advantage of micro projectors is that they can be applied to various scenes in life anytime, anywhere. For different scenarios, considering the need for different magnification ratios of images, the micro projector ...

AI Technical Summary

Problems solved by technology

The traditional LCoS micro-projector projection objective lens is composed of multiple solid lenses, and zooming is achieved by changing the relative positions of multiple lenses, which means that not only a large number of movable parts are required, but also precise and complex motor for mechanical drive

The friction loss of movable parts not only reduces the service life of the system, but also affects the imaging quality of the system. At the same time, the complex structure makes the whole system not compact, cumbersome and costly. Therefore, a compact and light structure with a large The LCoS projection objective lens with focusing range has important practical significance

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