Real image albada finder

Details Real image albada finder Real image albada finder

1996-10-16

1998-04-14

Nelms, David C.

Optical: systems and elements

Lens

Eyepiece

359730, 359731, 359732, 359733, 359727, G02B 1700, G02B 2500

Patent

active

057399565

ABSTRACT:
There is provided an objective lens for focusing a subject light to form a real image on a predetermined focal plane, an eyepiece through which the real image is observed, and the first and second prism assemblies between the objective lens and the eyepiece for erecting an inverted image. The first and second prism assemblies are arranged at a predetermined distance away from each other such that the exit surface of the first prism assembly and the incident surface of the second prism assembly face each other across the focal plane. As a result, the dust on the whole surface of the prism assemblies and the like are made inconspicuous. Moreover, a visual field frame is provided on the focal plane, so that the visual field frame can be prevented from becoming out of focus and the border of the visual field can be seen clearly. Furthermore, a virtual image of a mark such as a target mark is formed in the Albada method.

REFERENCES:
patent: 4952956 (1990-08-01), Kikuchi
patent: 5231534 (1993-07-01), Kato
patent: 5453809 (1995-09-01), Miyano
patent: 5491528 (1996-02-01), Takato et al.

Affiliated with

Also associated with

Rating

Real image albada finder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Real image albada finder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Real image albada finder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-641061