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 equipments
Info
Publication number
HUT59344A
HUT59344AHU595290AHU595290AHUT59344AHU T59344 AHUT59344 AHU T59344AHU 595290 AHU595290 AHU 595290AHU 595290 AHU595290 AHU 595290AHU T59344 AHUT59344 AHU T59344A
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Videoton Elekt VallalatfiledCriticalVideoton Elekt Vallalat
Priority to HU595290ApriorityCriticalpatent/HUT59344A/en
Publication of HU905952D0publicationCriticalpatent/HU905952D0/en
Publication of HUT59344ApublicationCriticalpatent/HUT59344A/en
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.
HU595290A1990-09-191990-09-19Method and device for producing aspherical focusing objective lens applied in the back-playing equipments of data-storing systems first in cd back-playing equipments
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
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
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
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
Process for low pressure production of high density solid CO2 blocks, process for automatic pressure production of solid CO2 blocks, apparatus for low pressure production of high density solid CO2, apparatus for automatic low production pressure of solid co2 blocks, and, apparatus for the automatic production under pressure of solid CO2 blocks
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.