Resources Contact Us Home
Optical pickup device

Image Number 4 for United States Patent #7751299.

There is provided an inexpensive optical pickup device that is capable of accurately detecting light quantities of output laser beams on occasion of at least either of reproduction and recording on an information recording medium. A beam from a first light source 1 which beam does not pass through a wavelength selection film 6 of a light separation element 7 is reflected by a first reflection film 10 in a direction to an optical monitor 5. A beam from a second light source 2 which beam does not pass through the wavelength selection film 6 of the light separation element 7 is reflected by a second reflection film 11 in a direction to the optical monitor 5.

  Recently Added Patents
System and method for providing private demand-driven pricing
Carrier sense multiple access (CSMA) protocols for power line communications (PLC)
Sensing device and electronic apparatus
Method and apparatus for generating soft bit values in reduced-state equalizers
Radiation-emitting semiconductor chip and method for producing a radiation-emitting semiconductor chip
Method and apparatus for secure transfer and playback of multimedia content
  Randomly Featured Patents
Subtractive color twisting ball display
Camera storage bag
Low drop-out switching regulators
Self-terminating electrical connector assembly
Quantum tunnelling transducer device
Resin coated substrate using a short-set, high-flow melamine-formaldehyde impregnating resin
Insulating light transmissive and flexible greenhouse cover
Dual mode anticollision/recognition lamp for aircraft
Multi-function mobile
Method for treating pervasive development disorders