High-definition micro projection lens

Abstract

The invention discloses a high-definition micro projection lens, which sequentially comprises a positive lens group A, a diaphragm B and a positive lens group C from an object space to an image space, the focal length of the positive lens group A is fA, the positive lens group A is composed of a rightward bent meniscus negative lens A1 and a biconvex positive lens A2, the focal length of the positive lens group C is fC, and the positive lens group A is composed of a rightward bent meniscus negative lens A1 and a biconvex positive lens A2. The lens is composed of a double-concave-surface negative lens C1, a double-convex-surface positive lens C2, a meniscus negative lens C3 which is bent leftwards and a double-convex-surface positive lens C4. The system is low in cost, clear in imaging and stable in image quality, and effectively improves the application and experience of a user.

Description

technical field [0001] The invention belongs to the technical field of projection lenses, and in particular relates to a high-definition micro-projection lens. Background technique [0002] After several years of development, the development of micro-projectors has now entered a mature stage. Nowadays, people attach great importance to the application experience of products, and more and more functions and more favorable prices have become the current development trend of micro projectors. Thanks to the high-definition and full-high-definition trend of "multimedia content", consumer customers are also increasingly picky about the resolution of projection products. In LED projection, high-resolution products are becoming more and more popular. The projection lens is an important part of the projection product, and its performance directly affects the display effect of the projection product. [0003] In the use of the existing projection lens, the miniature projector will a...

AI Technical Summary

Problems solved by technology

[0004] In the previous design technology, because the imaging quality of the projection lens in the working temperature range was not properly optimized in the optical system structure, the imaging could not always be kept clear when working in the ambient temperature range of -20°C∽+60°C. The quality is stable, and the user needs to manually or electrically adjust the lens to focus during use, which affects the user experience

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