Claims
- 1. A mold for use for press-molding an optical element, comprising at least the molding surface of a mold base material coated with a hard carbon film containing 0-5 atom% of hydrogen therein and having a spin density of 1.times.10.sup.18 spin/cm.sup.3 or less and a film density of 1.5 g/cm.sup.3 or more.
- 2. An optical element molding method comprising the steps of:
- preparing a hydrogenated amorphous carbon film (a-C:H) containing 5-40 atom% hydrogen;
- heat-treating said a-C:H film to obtain a hard carbon film containing 0-5 atom% hydrogen and having a spin density of 1.times.10.sup.18 spin/cm.sup.3 or less and a film density of 1.5 g/cm.sup.3 or more;
- coating a surface of a mold with said hard carbon film;
- setting an optical glass element in said mold;
- press-molding said optical glass element to form a desired optical article.
Priority Claims (5)
Number |
Date |
Country |
Kind |
63-202739 |
Aug 1988 |
JPX |
|
63-230148 |
Sep 1988 |
JPX |
|
63-230149 |
Sep 1988 |
JPX |
|
63-232234 |
Sep 1988 |
JPX |
|
1-177144 |
Jul 1989 |
JPX |
|
Parent Case Info
This application is a division of application Ser. No. 07/683,537 filed Apr. 10, 1991, now U.S. Pat. No. 5,202,156, which is a division of application Ser. No. 07/394,208 filed Aug. 15, 1989, now U.S. Pat. No. 5,026,415 issued Jun. 25, 1991.
US Referenced Citations (7)
Foreign Referenced Citations (10)
Number |
Date |
Country |
49-81419 |
Aug 1974 |
JPX |
52-45613 |
Sep 1976 |
JPX |
55-11624 |
Mar 1980 |
JPX |
60-246230 |
May 1984 |
JPX |
61-183134 |
Feb 1985 |
JPX |
61-281030 |
Jun 1985 |
JPX |
63-203222 |
Feb 1987 |
JPX |
63-217384 |
Jul 1988 |
JPX |
63-44315 |
Jan 1989 |
JPX |
64-835291 |
Mar 1989 |
JPX |
Non-Patent Literature Citations (2)
Entry |
Journal of Non-Crystalline Solids 35 & 36 (1980), pp. 543-548, N. Wada et al., "Diamond-Like" 3-Fold Coordinated Amorphous Carbon. 1980. |
F. W. Smith, "Optical Properties and Local Atomic Bonding In Hydrogenated Amorphous Carbon And Silicon-Carbon Alloys," Materials Science Forum, vols. 52 and 53, 1989, pp. 323-340. |
Divisions (2)
|
Number |
Date |
Country |
Parent |
683537 |
Apr 1991 |
|
Parent |
394208 |
Aug 1989 |
|