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Patent Searching and Data


Title:
PANORAMA IMAGING LENS AND ON-VEHICLE ELECTRONIC MIRROR DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/082241
Kind Code:
A1
Abstract:
Provided are: a panorama imaging lens the height of which can be lowered while a sufficient rear visual field is ensured with use of a resin-based optical material having heat resistance up to 100°C or higher at a normal refractive index; and an on-vehicle electronic mirror device. The panorama imaging lens is provided with: a ring-like light incident surface that is formed of, as raw materials, a reflection film and a light transmitting resin having a refractive index of 1.50-1.65, that is formed so as to be rotationally symmetric about the optical axis, and that is formed into a substantially convex lens so as to allow lateral light from the entire circumference to be incident thereon; a concave mirror-like first reflection surface that is formed into a ring-like shape so as to substantially face the light incident surface, that is formed into an outwardly expanded shape, and that reflects the light toward the inside of the lens; a concave mirror-like second reflection surface that is provided at the center of the ring of the light incident surface and that reflects the reflection light from the first reflection surface toward the inner portion of the ring of the first reflection surface; and a light emitting surface that is disposed at the center of the ring of the first reflection surface, that faces the second reflection surface, and that allows the light from the second reflection surface to transmit therethrough, wherein the light incident surface is formed into a spherical shape in which a ratio h/φ of the height h to the maximum diameter φ is 1.0 or less.

Inventors:
HONDA KENICHI (JP)
Application Number:
PCT/JP2017/038193
Publication Date:
May 02, 2019
Filing Date:
October 23, 2017
Export Citation:
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Assignee:
TATEYAMA KAGAKU IND CO LTD (JP)
International Classes:
G02B17/08; B60R1/00; G02B3/00; G03B15/00; G03B37/00; H04N5/232
Foreign References:
JP2012093760A2012-05-17
JP2004157241A2004-06-03
JP2014134563A2014-07-24
JP2011095492A2011-05-12
JP2017181634A2017-10-05
JP2011186480A2011-09-22
Attorney, Agent or Firm:
JODAI, Tetsuji et al. (JP)
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