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
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
Application number
HU595290A
Other languages
Hungarian (hu)
Other versions
HU905952D0 (en
Inventor
Sandor Kerekgyarto
Miklos Barabas
Peter Richter
Imre Loerincz
Laszlo Zubonyai
Janos Giber
Gabor Szarvas
Istvan Farkas
Sandor Varkonyi
Istvan Pinter
Original Assignee
Videoton Elekt Vallalat
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 Vallalat filed Critical Videoton Elekt Vallalat
Priority to HU595290A priority Critical patent/HUT59344A/en
Publication of HU905952D0 publication Critical patent/HU905952D0/en
Publication of HUT59344A publication Critical patent/HUT59344A/en

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.
HU595290A 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 HUT59344A (en)

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)

Also Published As

Publication number Publication date
HU905952D0 (en) 1991-03-28

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Legal Events

Date Code Title Description
DFD9 Temporary prot. cancelled due to non-payment of fee