Resources Contact Us Home
Mastering apparatus for recording onto a glass master and method for recording onto a glass master

Image Number 4 for United States Patent #6103177.

A mastering apparatus for recording optical information onto a glass master 6, includes an objective lens 3, a slider 5 for controlling the movement of the objective lens 3 in the tracking direction, a turn table 7 for rotating the glass master 6, a spindle motor 8 for controlling the rotation of the turn table 7, a positioning beam generator 9, a positioning beam detector 10 for detecting a positioning beam reflected and/or diffracted by positioning units 16 and 17 and a slider controller 11 for moving the slider 5 based on the result of reception of a beam at the positioning beam detector 10. The positioning unit 16 is mounted on the vicinity of the objective lens 3, and the positioning unit 17 is mounted on the upper surface of a spindle stationary portion 13. Since the position of the positioning unit 17 is always stable, relative positional deviation between the positioning units 16 and 17 can be accurately detected by detecting the beam diffracted by the positioning units 16 and 17.

  Recently Added Patents
Radiation detection apparatus, manufacturing method therefor, and radiation imaging system
System, method and apparatus for clientless two factor authentication in VoIP networks
Wheel for motor vehicle
Double ring network system and communication control method thereof, and transmission station, and program for transmission stations
Detection of a user's visual impairment based on user inputs or device settings, and presentation of a website-related data for sighted or visually-impaired users based on those inputs or sett
Information caching system
Methods and apparatus to implement multipoint and replicated communication paths using upstream and recursive downstream label mappings
  Randomly Featured Patents
Sound field control device
Pre-testable semiconductor die package
Network supported network file sharing among mobile subscribers
Orthopedic supporting member, particularly orthopedic shoe inserts, and method of its manufacture
Ocean wave electricity generator apparatus
Connector for a coaxial cable and its connecting method
Spherical boron nitride particles and method for preparing them
Car telephone cover apparatus
Self-assembly and mineralization of peptide-amphiphile nanofibers
Method and apparatus for proper registration of mating parts