Resources Contact Us Home
Multi-beam zoom lens for producing variable spot sizes for a laser printer

Image Number 8 for United States Patent #6476962.

A multi-beam zoom lens for producing variable spot sizes on a photosensitive medium from a plurality of individually modulated light sources wherein each light source emits a light beam parallel to each of the other light sources and parallel to an optical axis and wherein a numerical aperture of each of said light beams is greater than 0.125, comprising an afocal zoom lens (10). The afocal zoom lens comprises a first moving group of lenses (13), a second group of moving lenses (14), and a third group of moving lenses (15). A constant barrel length of the afocal zoom lens is less than 160 mm and the zoom lens has a constant distance from the light sources to the photosensitive medium of less than 180 mm. The zoom lens has an afocal magnification of at least 45% across a zoom range.

  Recently Added Patents
Liquid crystal display
Methods of implanting dopant ions
Image forming apparatus with static elimination
Tetrazolyl oxime derivative, salt thereof, and plant disease control agent
Optical imaging device and imaging method for microscopy
Configurable memory controller/memory module communication system
System and method for detecting executable machine instructions in a data stream
  Randomly Featured Patents
Liquefaction of calcium-containing coals
Extended reach garden shears
Cutting tool configured for improved engagement with a tool holder
Fly-fishing reel
Wall mounted display
S-alkylated coenzyme A with effect on polyamine acetylase
Membrane element sealing material holding member and membrane element
Method for retarding the setting time of rapid hardening cement
Method for winding a heating wire
Power supply unit directly connected to backup direct current power source