A 5-piece dome projection lens and system

A projection lens and projection system technology, applied in the field of dome projection lenses and systems, can solve the problems of excessive number of lenses, increased production costs, and reduced production efficiency, and achieve high transmittance, save man-hours, and improve production efficiency Effect

Inactive Publication Date: 2019-04-30
CHENGDU CRYSTAL LENS SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a 5-piece dome projection lens and system for the above disadvantages, which solves the problem that the lenses in the prior art are glued together with optical glass materials in order to correct chromatic aberration, resulting in too many lenses, reduced production efficiency, increased cost of production

Method used

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  • A 5-piece dome projection lens and system
  • A 5-piece dome projection lens and system
  • A 5-piece dome projection lens and system

Examples

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Embodiment 1

[0040] A 5-piece ball screen projection lens, comprising a main lens barrel 1, a fifth lens 2, a fourth lens 3, a third lens 4, a second lens 5 and a first lens arranged on the main lens barrel 1 in sequence along the optical path 6. The first lens 6 is a convex-concave lens with a focal length of -70mm; the second lens 5 is a biconcave lens with a focal length of -70mm; the third lens 4 is a biconcave lens with a focal length of -80mm; Four lenses 3 are plano-convex lenses with a focal length of 60 mm; the fifth lens 2 is a plano-convex lens with a focal length of 100 mm, and the first lens 6, the second lens 5, the third lens 4, the fourth lens 3 and the fifth lens 2 is PMMA optical plastic; the first surface S1 of the first lens 6 is spherical, R1=1000mm, the second surface S2 is aspheric, R2=24mm, K2=0.2, 4th=-1.1e-5, 6th =-4.3e-9, 8th=-4.1e-12; the first surface S3 of the second lens 5 is spherical, R3=-60mm, the second surface S4 is aspheric, R4=24mm, K2=0.2 , 4th=-6e-6...

Embodiment 2

[0042]A 5-piece ball screen projection lens, comprising a main lens barrel 1, a fifth lens 2, a fourth lens 3, a third lens 4, a second lens 5 and a first lens arranged on the main lens barrel 1 in sequence along the optical path 6. The first lens 6 is a convex-concave lens with a focal length of -40mm; the second lens 5 is a biconcave lens with a focal length of -40mm; the third lens 4 is a biconcave lens with a focal length of -40mm; The four lenses 3 are plano-convex lenses with a focal length of 120 mm; the fifth lens 2 is a plano-convex lens with a focal length of 300 mm, and the first lens 6, the second lens 5, the third lens 4, the fourth lens 3 and the fifth lens 2 is PMMA optical plastic; the first surface S1 of the first lens 6 is spherical, R1=2000mm, the second surface S2 is aspherical, R2=32mm, K2=0.4, 4th=-1.5e-5, 6th =-6e-9, 8th=-6e-12; the first surface S3 of the second lens 5 is spherical, R3=-90mm, the second surface S4 is aspherical, R4=42mm, K2=0.4, 4th =-...

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Abstract

The invention belongs to the technical field of ball curtain projection lenses and systems and discloses a 5-piece type ball curtain projection lens and system to solve the problems that in lenses in the prior art, as optical glass materials are adopted for gluing to correct color differences, the number of lenses is too large, the production efficiency is low, and production cost is increased. The 5-piece type ball curtain projection lens comprises a main lens barrel, a fifth lens, a fourth lens, a third lens, a second lens and a first lens, wherein the fifth lens, the fourth lens, the third lens, the second lens and the first lens are arranged on the main lens barrel along a light path in sequence; the first lens is a convex-concave lens, the second lens is a double-concave lens, the third lens is a double-concave lens, the fourth lens is a plano-convex lens, and the fifth lens is a plano-convex lens. The 5-piece type ball curtain projection lens and system are used for projection imaging.

Description

technical field [0001] A 5-piece ball screen projection lens and system are used for projection imaging and belong to the technical field of ball screen projection lenses and systems. Background technique [0002] The dome lens is a wide-angle fisheye lens. The field of view of this lens is generally greater than 160 degrees. From the perspective of optical technology, it is very difficult for the fisheye lens used for projection imaging to meet the image quality requirements of such a large angle range. [0003] The spherical screen projection, the field of view is twice as large as that of the hemispherical screen projection, and the distortion is also very large, so the correction is more difficult. If the distortion is not corrected, the projection of the image on the spherical screen, the image magnification on the South Pole and the North Pole will be reduced. Different. Images at the South Pole and North Pole are distorted and distorted. In order to correct chroma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/06G02B13/18G02B1/04
CPCG02B1/041G02B13/06G02B13/18
Inventor 刘勇武宇张治全赵锐宋春发
Owner CHENGDU CRYSTAL LENS SCI & TECH
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