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
Synthetic bone grafts
System and method for document orientation detection
Down-drawable, chemically strengthened glass for cover plate
Fabrication of high gradient insulators by stack compression
Print control server, print controlling method, and print control program
Wild card auto completion
  Randomly Featured Patents
System and method for a three-piece design of a magnetic head assembly
Single phase/amorphous blends of amorphous semiaromatic polyamides and semicrystalline nylon polyamides
Methods for using functional site descriptors and predicting protein function
Multi-tasking utility tool
Heat-transfer label assembly and apparatus for applying heat-transfer labels
Method for multi-criteria flank milling of ruled surfaces
Portion of a computer screen with a computer icon image
Catheter with a plurality of wire guide access parts
Method for deicing highways using starch-containing compositions and starch-containing compositions especially designed for deicing highways
Cycloalkyl (.alpha.-triazolyl-.beta.-hydroxy)-ketones as fungicides and plant growth regulators