A lens for a 4k LCOS projection system

Abstract

The invention relates to a lens of a 4K LCOS projection system, and particularly provides a 4K prime lens for a projector of a 3LCOS telecentric optical system. The lens comprises a lens barrel. Ninespherical lenses are sequentially arranged in the lens barrel. The nine spherical lenses are sequentially composed of a first optical objective lens, a second optical objective lens, a third optical objective lens, a fourth optical objective lens, a fifth optical objective lens, a double-glued objective lens, a sixth optical objective lens and a seventh optical objective lens, wherein a light combining prism, a PBS prism and an LCOS packaging lens are sequentially arranged after the seventh optical objective lens. According to the invention, a new design is adopted, so that the requirements ofultra-high-definition lenses applied in various fields are met. The lens is capable of satisfying ultra-large-size and high-definition projection requirements. Meanwhile, the lens is long in back focal length and good in telecentricity, wherein a previous telecentric illumination light path can be well continued. Meanwhile, the lens is good in relative illumination, excellent in homogeneity and strong in resolution capability, and is capable of realizing the high-brightness and large-size splicing and satisfying the projection requirements of ultra-high-definition colors. Meanwhile, the lensis also capable of satisfying the requirements of DLP and LCD projection light paths.

Description

technical field [0001] The invention relates to a lens of a 4K LCOS projection system, specifically a 4K fixed-focus lens for a projector of a 3LCOS telecentric optical system, belonging to the field of projector equipment, especially for large-scale engineering projection and ultra-high-definition requirements Front projection or rear projection screen projection system is also suitable for new light source systems, such as laser light source and so on. [0002] technical background [0003] With the development of projection technology, the application of projectors in many fields is becoming more and more extensive. At the same time, people's requirements for size and definition are getting higher and higher. For LCOS with the same resolution, the larger the size of the projection, the more grainy the screen pixels will be. At present, most of the projections in the market are 2K projections. With the gradual maturity of technology and market demand, the popularity of 4K p...

AI Technical Summary

Problems solved by technology

For LCOS with the same resolution, the larger the size of the projection, the more grainy the screen pixels will be. At present, most of the projections in the market are 2K projections. With the gradual maturity of technology and market demand, the popularity of 4K projectors will also increase. The faster, especially in the field of large screens, has an absolute advantage, so the market demand for 4K lenses is also increasing day by day. The quality of the lens directly affects the effect of the projected picture, whether it is resolution, chromaticity, contrast, etc. At present, Most of the 2K lenses on the market are not enough to meet the needs of 4K projectors, and some foreign 4K lenses are very expensive, and domestic resources are relatively scarce, which requires redesign and optimization of previous lenses

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