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A dome-shaped screen projecting objective lens

An objective lens and screen technology, applied in the field of projection lenses, can solve the problems of unsuitable display effect, inconvenient use of dome-shaped screens, lens distortion, etc., and achieve the effects of compact structure, low cost and small size

Active Publication Date: 2018-12-04
CHANGZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. If the existing lens is used on a spherical screen, serious distortion will occur;
[0006] 2. It is not suitable for the display effect in a large environment;
[0007] 3. It cannot be conveniently used on a dome screen

Method used

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  • A dome-shaped screen projecting objective lens
  • A dome-shaped screen projecting objective lens
  • A dome-shaped screen projecting objective lens

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Embodiment Construction

[0022] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0023] figure 1 It is a structural diagram of the optical system of the present invention. It is clearly indicated in the figure that the system is composed of 14 lenses, and the positions of the diaphragm and the film have been clearly marked: including lenses L1 and L2, which are two lenses with larger diameters and negative refractive power. To compress light; lens L3, L4, L5 composed of lens group with negative dioptric power, mainly to eliminate marginal chromatic aberration; Lenses L6, L7, L8, L9 are positive dioptric lenses, used to correct various aberrations Mainly; the function of the diaphragm is to limit the scope of the imaging beam, and form a conjugate surface with the film surface.

[0024] Among them, lenses L1 and L2 are lense...

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Abstract

The invention discloses a doom shaped screen projection objective lens comprising a first set of large field negative lenses formed by lenses L1, a second set of large field negative lenses formed by lenses L2, a third set of three cemented lenses formed by lenses L3, L4 and L5 arranged in sequence, a fourth set of lenses formed by lenses L6, L7, L8, and L9 arranged in sequence, an aperture, and a fifth set of lenses formed by lenses L10, L11, L12, L13, and L14 arranged in sequence. The sixth set of components is at the position of a film or a CCD imager. The dome-shaped screen projection objective lens of the invention can be adapted for domed screen display and has a small size and a compact structure. With no aspheric design, the cost is low while the imaging quality is high. For the arrangement of a splitter in the front of the film and the slight optimization of an optical system, an ultra-wide-angle projection lens effect can be achieved.

Description

technical field [0001] The present invention relates to a projection lens, in particular to a lens projecting into a spherical dome. Background technique [0002] The projection lens is the core component of the projector equipment, which can project the image of film or CCD and other devices through the light source projection or reflection device, and then project it onto the projection screen through the projection lens for imaging. [0003] As audio-visual and large-screen projection equipment play more and more roles in life, display equipment with better imaging effect and lower cost is required in some special environments such as science and technology museums, large amusement parks, theme parks and other places. [0004] Most of the existing projection lenses on the market are more suitable for the requirements of flat projection screens, so they will bring the following defects: [0005] 1. If the existing lens is used on a spherical screen, serious distortion wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G03B21/14
CPCG02B13/0015G02B13/006G03B21/14
Inventor 徐安成饶丰
Owner CHANGZHOU INST OF TECH