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
Retinal prosthesis techniques
Secondary sensing for intelligent passive entry passive start polling
Lens barrel, imaging device and manufacturing method thereof
Information processing apparatus, information processing system, information processing method, and program
System for generating controllable difference measurements in a video processor
Joint optimization of packetization and error correction for video communication
Integrated ambient light sensor and distance sensor
  Randomly Featured Patents
High-voltage MOS transistor
Fixture and method for training and use of apical position locator
Doppler effect speedometer
Transfer case for four-wheel-drive vehicles
Enclosure panel for tractor
Method and apparatus for synchronized channel transmission
Building panel
Method for maintaining the electrochromic activity of an electrochromic material
Electric rotating machine
Color cathode ray tube having an improved electron gun