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anamorphic projection lens

Inactive Publication Date: 2016-08-17
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the size of the reflector used to turn the light path in the traditional head-up display system, especially the vertical height is too large, this factor limits the further reduction of the thickness of the head-up display system HUD

Method used

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Embodiment Construction

[0034] The invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] The implementation of the anamorphic projection lens of the present invention will be further described below. The implementation example is only for better illustrating the implementation method of the present invention and explaining possible design ideas. Language used in the description does not place a limitation on the claims of the invention.

[0036] Such as figure 1 As shown, the solid line represents the optical path of light from the projector to the imaging surface when projected by a common projection lens; the dotted line represents the optical path of light from the projector to the imaging surface when projected by an anamorphic projection lens. When the projected image is not longitudinally compressed, the height of the reflector 2 is a, and the thickness of the entire head-up display device 5 is A; when the projected image is compressed lon...

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Abstract

The invention discloses an anamorphic projection lens. The projection lens is composed of a basic projection lens group and an anamorphic lens group. The anamorphic lens group contains cylindrical lenses. Ratio, the vertical direction of the projected image is compressed relative to the horizontal direction, and the vertically compressed image is then projected onto the synthesizer, wherein the magnification ratio of the vertical direction of the synthesizer is greater than that of the horizontal direction to compensate for the impact of the cylindrical anamorphic lens Vertical compression of projected images. The anamorphic projection lens is used in the head-up display system of the car to effectively reduce the height of the reflector, which is beneficial to the reduction of the overall thickness of the head-up display system.

Description

technical field [0001] The invention relates to an anamorphic projection lens, which belongs to the technical field of optical imaging. Background technique [0002] The appearance of the car head-up display system HUD has increased the safety of driving. Due to the limited space in the cockpit, the structure of the head-up display system HUD is becoming more and more compact, and its thickness is also decreasing. [0003] However, the size of the reflector used to turn the light path in the traditional head-up display system, especially the vertical height is too large, this factor limits the further reduction of the thickness of the head-up display system HUD. If this restriction is removed, the thickness of the head-up display device can be effectively reduced, making it compact, lightweight and portable. And the present invention can well solve the above problems. Contents of the invention [0004] The purpose of the present invention is to provide an anamorphic pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/18G02B3/06G02B27/01
Inventor 高志强王东平密保秀
Owner NANJING UNIV OF POSTS & TELECOMM