Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Focusing distance of an objective lens according to a vertical deviation standard of optical recording media with different thicknesses










Image Number 12 for United States Patent #5883873.

An optical recording and reproducing device of the present invention has an objective lens designed so as to form a light spot with a set diameter on a DVD, while to form, on a CD, a light spot with a set diameter different from the above diameter. Respective working distances WD1 and WD2 with respect to the DVD and the CD are set in accordance with deflection standards F for the DVD and the CD, respectively. By doing so, as compared with conventional cases where the deflection standards F are not taken into consideration, the working distance WD1 is decreased. As a result, the device is thinned, compared with the conventional cases.








 
 
  Recently Added Patents
Method and apparatus for monitoring and/or controlling the curing of cements used in medical procedures
Shoe
Preventative traffic congestion social networking improvement system within a community
Charged particle source with multiple selectable particle emitters
Method and apparatus for transcoding and transrating in distributed video systems
Pyrrolidine-1,2-dicarboxamide derivatives
System and method for stranded file opens during disk compression utility requests
  Randomly Featured Patents
Blood shut-off valve
Hinge device having a plurality of axes for a portable terminal and a connection member having the plurality of axes
Process for the preparation of polychloroprene
Recovering a persistent storage unit in a wagering game system
Semiconductor integrated circuit
Structural bridging fastener
Rotary food processing apparatus
Eddy current proximity sensor for use in a hostile turbine environment
Regulator device for an asynchronous machine used in particular as a drive for electric vehicles
Binder