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, namely first to sixth lenses, which are sequentially arranged on the same optical axis and have positive, negative, negative, negative, positive and positive focal lengths in sequence; the second lens group comprises a seventh lens to an eleventh lens which are sequentially arranged on the same optical axis, and the focal lengths of the seventh lens to the eleventh lens are negative, positive, positive, positive and positive in sequence; the seventh lens and the eighth lens form a doublet lens of which the convex surface faces 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 curvature radius of the object side surface of the first lens is R1, the curvature radius of the image side surface of the first lens is R2, the equivalent focal lengths of the second lens, the third lens and the fourth lens are F3, the equivalent focal lengths of the fifth lens and the sixth lens are F4, and the relational expression is 1<R1 / R2<1.4, and 4<|F4 / F3|<10.

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 with 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 com...

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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