18919752. MULTIFOCAL LENS, PROJECTOR, AND IMAGING APPARATUS (SEIKO EPSON CORPORATION)
MULTIFOCAL LENS, PROJECTOR, AND IMAGING APPARATUS
Organization Name
Inventor(s)
Masakazu Kawamura of Azumino-shi JP
MULTIFOCAL LENS, PROJECTOR, AND IMAGING APPARATUS
This abstract first appeared for US patent application 18919752 titled 'MULTIFOCAL LENS, PROJECTOR, AND IMAGING APPARATUS
Original Abstract Submitted
A multifocal lens is configured with multiple lens groups and has a focal position changed by changing the positions of the lens groups, and the chromatic aberration of magnification of the multifocal lens is characterized in that the larger one of the amount of aberration at the wide angle end and the amount of aberration at the telephoto end is smaller than the amount of aberration in an intermediate region between the wide angle end and the telephoto end.