Imaging optical system and endoscope provided with imaging...

Details Imaging optical system and endoscope provided with imaging... Imaging optical system and endoscope provided with imaging...

2008-01-08

2008-01-08

Le, Que Tan (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C600S101000, C600S109000, C600S160000, C348S065000, C356S241100

Reexamination Certificate

active

07317180

ABSTRACT:
An imaging optical system includes a spherical or nearly spherical viewing port, an objective lens that includes an aspheric surface and is formed as a single lens element, and a solid-state image sensor that receives an image formed by the imaging optical system. Specified conditions are satisfied by the imaging optical system and the objective lens so that an in-focus image having low distortion, sufficient contrast, and formed by light rays of restricted angles of incidence is formed even for an object in contact with the viewing port. The specified conditions relate to features of the imaging optical system such as focal length and f-number of the imaging optical system, astigmatism and distortion of the imaging optical system, and pixel pitch of the solid-state image sensor. An endoscope that includes the imaging optical system is also disclosed.

REFERENCES:
patent: 4097125 (1978-06-01), Suzuki
patent: 7244229 (2007-07-01), Yokoi et al.
patent: 2001/0016680 (2001-08-01), Minami et al.
patent: 2003/0002174 (2003-01-01), Dou
patent: 2003/0171648 (2003-09-01), Yokoi et al.

Affiliated with

Also associated with

Rating

Imaging optical system and endoscope provided with imaging... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Imaging optical system and endoscope provided with imaging..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Imaging optical system and endoscope provided with imaging... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2781750