Title:
【発明の名称】漸進付加レンズ
Document Type and Number:
Japanese Patent JPS58501969
Kind Code:
A
Abstract:
A progressive addition lens is provided having a wide transition corridor and an improved balance between astigmatism and distortion in the field of peripheral vision to provide a wide, distortion-free clear view. This is achieved by employing a cosine function in blending the transition corridor with the peripheral area.
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Inventors:
Vuan Ryton Roll Frederik
Yeo Kotuk Key-
Yeo Kotuk Key-
Application Number:
JP50012783A
Publication Date:
November 17, 1983
Filing Date:
November 12, 1982
Export Citation:
Assignee:
Polycore-Optical Private Eight Limited
Vuan Ryton Roll Frederik
Yeo Kotuk Key-
Vuan Ryton Roll Frederik
Yeo Kotuk Key-
International Classes:
G02B3/10; G02C7/02; G02C7/00; G02C7/06; (IPC1-7): G02C7/00; G02B3/10
Attorney, Agent or Firm:
Shoichi Kadoma