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Patent Searching and Data


Title:
MULTILAYER MOLDED LENS
Document Type and Number:
WIPO Patent Application WO/2021/149195
Kind Code:
A1
Abstract:
Provided is a multilayer molded lens which is manufactured by uniformly injecting and filling a molten resin that has a small pressure loss and is free of contamination with foreign materials, and which has excellent optical properties. A multilayer molded lens 5 having three or more layers (N layers), which is provided with a pair of lens surfaces 50 each intersecting a lens optical axis L and a lens side surface 30 arranged between the pair of lens surfaces 50 on the side of the lens optical axis L, wherein a gate mark group in which N gate marks 11t to 14t that are marks of side gates respectively in first to Nth layers are integrated is formed at a width-direction center part of the lens side surface 30.

Inventors:
HIGASHIMURA HIROSHI (JP)
Application Number:
PCT/JP2020/002144
Publication Date:
July 29, 2021
Filing Date:
January 22, 2020
Export Citation:
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Assignee:
NANBU PLASTICS CO LTD (JP)
International Classes:
B29C45/26; G02B3/00
Foreign References:
JP2015514608A2015-05-21
JP2018065281A2018-04-26
Attorney, Agent or Firm:
FUJIKAWA, Yukiharu (JP)
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