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
Method and composition for hyperthermally treating cells
Family of pain producing substances and methods to produce novel analgesic drugs
Optical modulator module
Preparation and its use of derivatization reagent for detecting L-carnitine or D-carnitine
Regulating a supply voltage provided to a load circuit
Defected ground plane inductor
Heating pad
  Randomly Featured Patents
Control system for exhaust gas recovery system in an internal combustion engine
Plum tree named `YUMMYROSA`
Novel cyclopropane carboxylic acid esters
Specific binding-adsorbent assay test means
Blends of and methods of blending olefin/ester copolymers having improved environmental stress cracking or environmental fatigue resistance
Shearing blade mount for cut-off die set
Heat deflector
Light-sensitive material containing silver halide, reducing agent and polymerizable compound with silver halide outside and inside of microcapsules
Method and apparatus for connecting to external device