Title:
MOLDING DEVICE FOR OPTICAL ELEMENT
Document Type and Number:
Japanese Patent JP3135098
Kind Code:
B2
Abstract:
PURPOSE: To provide the molding device for optical elements devised to create a uniform temp. distribution in a master mold without changing the outside shape and size of the master mold in spite of use of the master mold having a variation in the temp. distribution according to its position, to avert the variation in the temp. distribution around upper and lower mold members and to suppress the temp. difference between respective molds (respective paired mold members) in the case of the master mold embracing plural pairs of the upper and lower mold members.
CONSTITUTION: This molding device for optical elements is constituted to transfer the desired shapes formed on the molding surfaces of the respective mold members to the surface of a glass blank material heated to a softening state by pressing the glass blank material between the upper mold member and the lower mold member. The above-mentioned master mold 11 for guiding the upper mold member and lower mold member 12 are so composed as to heat the upper mold member and the lower mold member by the heat conduction therefrom. The master mold itself is provided with heat insulating layers A, B for arbitrarily controlling the heat flow rate and the direction of heat flow.
Inventors:
Nobuyuki Nakagawa
Execution Isamu
Hiroyuki Kubo
Execution Isamu
Hiroyuki Kubo
Application Number:
JP17208893A
Publication Date:
February 13, 2001
Filing Date:
June 21, 1993
Export Citation:
Assignee:
Canon Inc
International Classes:
C03B11/08; C03B11/12; (IPC1-7): C03B11/08; C03B11/12
Domestic Patent References:
| JP255237A |
Attorney, Agent or Firm:
Johei Yamashita