Viewing optical system, and imaging apparatus comprising the...

Details Viewing optical system, and imaging apparatus comprising the... Viewing optical system, and imaging apparatus comprising the...

2008-09-15

2009-10-20

Martinez, Joseph (Department: 2873)

Optical: systems and elements

Lens

Eyepiece

C359S643000, C359S644000, C396S382000, C396S384000

Reexamination Certificate

active

07605983

ABSTRACT:
The invention relates to a viewing optical system for viewing an object image formed on a focusing screen, and an imaging apparatus comprising the same. An image erection optical system comprises a prism having an internal reflective surface. An eyepiece optical system comprises, in order from a screen side to an exit pupil side, a first lens component having negative refracting power wherein its exit pupil-side surface has a paraxial-radius-of-curvature absolute value smaller than that of its screen-side surface, a second lens component in a double-convex shape and a third meniscus lens component in a meniscus shape concave on an exit pupil side. The total number of lens components included in the eyepiece optical system is 3, and the following conditions (1), (2) and (3) are satisfied.in-line-formulae description="In-line Formulae" end="lead"?1.55<ndp  (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0.35<fe/Dip<0.60  (2)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?1.0<D3/(D1+D2)<1.8  (3)in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
patent: 6125238 (2000-09-01), Hasushita et al.
patent: 59-148021 (1984-08-01), None
patent: 61-156017 (1986-07-01), None
patent: 2005-055874 (2005-03-01), None
patent: 2005-289039 (2005-10-01), None

Affiliated with

Also associated with

Rating

Viewing optical system, and imaging apparatus comprising the... does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4138292