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 14 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
Technique for skipping irrelevant portions of documents during streaming XPath evaluation
Touch screen tablet
Using storage cells to perform computation
Anti-proliferative and anti-inflammatory agent combination for treatment of vascular disorders with an implantable medical device
Squib control circuit
Method for manufacturing photoelectric conversion device
Connector interface for a cable
  Randomly Featured Patents
Directly driven microwave oven turntable top
Methods for treating cancers and restenosis with p21
Remotely operable flowline connector
Anti-skid device with plunger and diaphragm integrated by bonding
Paving stone, set of paving stones and device for producing the same
Aqueous drink composition comprising ibuprofen
Thermostatic switch
Dual stagger off settable azimuth beam width controlled antenna for wireless network
Protective housing for camera
Instruments and methods for inserting a spinal implant