Projection objective lens and scanning display device

Abstract

The invention relates to a projection objective lens and a scanning display device, which are used for solving the problem of arc-shaped image surface imaging and realizing clear imaging. The projection objective lens comprises a first lens group and a second lens group which are sequentially arranged from an object side to an image side and share the same optical axis; the first lens group comprises six lenses which are sequentially arranged from the object side to the image side, wherein the focal lengths of the six lenses are positive, negative, negative, negative, positive and positive. The object-side surface of the first lens is a convex surface, and the image-side surface is a concave surface. The second lens group comprises five lenses, namely a seventh lens to an eleventh lens, which are sequentially arranged from the object side to the image side and have negative focal lengths, positive focal lengths, positive focal lengths, positive focal lengths and positive focal lengths; the seventh lens is a biconcave lens, the eighth lens is a biconvex lens, and the seventh lens and the eighth lens form a doublet lens with a convex surface facing the image side; and the object side surface of the eleventh lens is a convex surface, and the image side surface is a concave surface, wherein the focal length of the first lens group is F1, the focal length of the first lens group is F2, and the following relational expressions are satisfied: 1.5<F1 / F2<2.0.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a projection objective lens and a scanning display device. Background technique [0002] The imaging principle of optical fiber scanning projection technology is: the scanning fiber is driven by the actuator to move on the predetermined two-dimensional scanning trajectory, and at the same time the light output power of the light source is modulated, and the information of each pixel point of the image to be displayed is projected onto the imaging area one by one, thus forming Cast screen. [0003] Figure 1A and Figure 1B is a structural schematic diagram of an existing optical fiber scanning projection system, wherein Figure 1B for Figure 1A side view. The fiber scanner projection system includes: a processor 100 , a laser unit 110 , a fiber scanner 120 , an optical fiber 130 , a light source modulation module 140 , a scanning drive module 150 and a light source beam comb...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiment of the present invention is to provide a projection objective lens and a scanning display device to solve the problem of arc image plane imaging in the fiber scanning projection system and realize clear imaging

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