HUT59344A - Method and device for producing aspherical focusing objective lens applied in the back-playing equipments of data-storing systems first in cd back-playing equipments - Google Patents
Method and device for producing aspherical focusing objective lens applied in the back-playing equipments of data-storing systems first in cd back-playing equipmentsInfo
- Publication number
- HUT59344A HUT59344A HU595290A HU595290A HUT59344A HU T59344 A HUT59344 A HU T59344A HU 595290 A HU595290 A HU 595290A HU 595290 A HU595290 A HU 595290A HU T59344 A HUT59344 A HU T59344A
- Authority
- HU
- Hungary
- Prior art keywords
- stationary
- objective lens
- playing equipments
- equipments
- playing
- Prior art date
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Mfr. of a spherical focussing objective lens, used for reading stored optical data, primarily for use in CD record players, is described. The lens is made of plastic material, by spray injection moulding. During the cooling phase of the moulding process, the screw feeder (19) is moved as a piston. The stationary forming tool is forced against the workpiece by a wedge, using a pneumatic cylinder. - The equipment comprises stationary and moving half-tools, joined at the closure plane. The shape of the lens is determined by the surfaces. The stationary tool contains the stationary stamp which is forced onto the workpiece by the wedge, operated by the hydraulic cylinder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HU595290A HUT59344A (en) | 1990-09-19 | 1990-09-19 | Method and device for producing aspherical focusing objective lens applied in the back-playing equipments of data-storing systems first in cd back-playing equipments |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HU595290A HUT59344A (en) | 1990-09-19 | 1990-09-19 | Method and device for producing aspherical focusing objective lens applied in the back-playing equipments of data-storing systems first in cd back-playing equipments |
Publications (2)
Publication Number | Publication Date |
---|---|
HU905952D0 HU905952D0 (en) | 1991-03-28 |
HUT59344A true HUT59344A (en) | 1992-05-28 |
Family
ID=10971025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HU595290A HUT59344A (en) | 1990-09-19 | 1990-09-19 | Method and device for producing aspherical focusing objective lens applied in the back-playing equipments of data-storing systems first in cd back-playing equipments |
Country Status (1)
Country | Link |
---|---|
HU (1) | HUT59344A (en) |
-
1990
- 1990-09-19 HU HU595290A patent/HUT59344A/en unknown
Also Published As
Publication number | Publication date |
---|---|
HU905952D0 (en) | 1991-03-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2293568A1 (en) | Injection molding process for rotationally asymmetric contact lens surfaces | |
BR9404079A (en) | Process for compression molding of enclosure in closures to form an enclosure | |
EP1426938A4 (en) | Object lens producing device and producing method | |
EP0740997A3 (en) | Method and apparatus for applying a surfactant to mold surfaces | |
AU2056995A (en) | Method and apparatus for applying a surfactant to mold surfaces | |
MX9305990A (en) | METHOD TO MANUFACTURE PLASTIC MOLDS. | |
AU4354100A (en) | Method and apparatus for handling parts ejected from an injection molding machine | |
DK0671249T3 (en) | Method and apparatus for making optical lenses | |
MY124155A (en) | Driving apparatus of an optical recording medium | |
JPH08127077A (en) | Molding of optical element | |
TR25597A (en) | ARTICLE PROCESSING MACHINE AND METHOD FOR FAST CHANGING OF HARDWARE | |
HUT59344A (en) | Method and device for producing aspherical focusing objective lens applied in the back-playing equipments of data-storing systems first in cd back-playing equipments | |
IL111873A (en) | Process and apparatus for the manufacture of a contact lens | |
US20030031751A1 (en) | Plastic optical fiber and face treatment method and treatment device | |
DE69300432D1 (en) | Laser device, in particular laser robot, with a focusing head, which is equipped with sensors for determining the quality of the process in an automatic production system. | |
ATE189992T1 (en) | METHOD FOR LIMITED INSERTION OF A DECOR IN A THERMOPLASTIC SUBSTRATE | |
ATE128899T1 (en) | DEVICE FOR INJECTIONING A THERMOPLASTIC PLASTIC PART. | |
DE69407713T2 (en) | Lactone-modified polyvinyl acetal resin, process for producing a curable resin composition thereof, and magnetic recording medium | |
JPH0254447A (en) | Production of substrate for optical recording medium | |
JPH02269020A (en) | Injection molding device for information recording disc and method of centering its mirror plate | |
JP2886224B2 (en) | Compound optical element manufacturing equipment | |
JPH0111450Y2 (en) | ||
JPH02273215A (en) | Apparatus for injection molding for information recording disc | |
GB2310387B (en) | Method for producing molding die for synthetic resin lens barrel having a helicoid and for producing the lens barrel | |
JP2001009883A (en) | Injection molding method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
DFD9 | Temporary prot. cancelled due to non-payment of fee |