Title:
MOLD FOR MICROLENS, MICROLENS AND PROCESS FOR PRODUCING THEM
Document Type and Number:
WIPO Patent Application WO/2008/099517
Kind Code:
A1
Abstract:
A refractive microlens, mold for microlens production and process for producing them,
realizing production of a mold with configuration just as designed and exhibition
of high optical performance. There are sequentially performed the initial
configuration step of forming recess (2) as initial configuration on substratum
(1) of homogeneous material and the ion machining step of forming the recess (2)
into spherical or cylindrical concave portion (3) by ion machining. The ion
machining step is a riddance machining of, using a gas inert to the substratum (1)
as ionization gas, exposing the substratum (1) to accelerated ion. The homogeneous material,
when the substratum (1) is made of sapphire, has high melting point and high hardness,
so that there can be obtained a mold for molding of all types of microlenses in contemporary
use. Further, as the sapphire crystal has little defect, there can be obtained
a mold with a surface free from defects.
Inventors:
TAKAMOTO KIICHI (JP)
Application Number:
PCT/JP2007/059011
Publication Date:
August 21, 2008
Filing Date:
April 19, 2007
Export Citation:
Assignee:
UNIV KAGAWA NAT UNIV CORP (JP)
TAKAMOTO KIICHI (JP)
TAKAMOTO KIICHI (JP)
International Classes:
B29C33/38; B29D11/00; G02B3/00; B29L11/00
Domestic Patent References:
| WO2007020967A1 | 2007-02-22 |
Foreign References:
| JPH07251464A | 1995-10-03 |
Attorney, Agent or Firm:
YAMAUCHI, Yasunobu et al. (Nihon Seime-Takamatsu-Ekimae Bldg. 3F1-1-8, Kotobuki-ch, Takamatsu-shi Kagawa 23, JP)
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