Viewing device

Details Viewing device Viewing device

2005-08-09

2005-08-09

Nguyen, Thong Q (Department: 2872)

Optical: systems and elements

Compound lens system

Telescope

C359S399000, C359S427000, C396S382000

Reexamination Certificate

active

06927907

ABSTRACT:
A reference plate is situated on an optical axis of an eyepiece. The reference plate includes a first glass plate and a second glass plate. One surface of the first glass plate and one surface of the second glass plate are bonded. Cross hairs are formed on the bonded surface of the first glass plate by using a chromium plating and so on. A radius of curvature of the bonded surface accords with the field curvature of the sagittal image surface of the eyepiece.

REFERENCES:
patent: 3942901 (1976-03-01), Ekstrand
patent: 4589744 (1986-05-01), Kimura et al.
patent: 4721375 (1988-01-01), Van Dulman
patent: 4981331 (1991-01-01), Taylor
patent: 5309201 (1994-05-01), Lyon
patent: 5414557 (1995-05-01), Phillips
patent: 5786935 (1998-07-01), Kanai et al.
patent: 5867250 (1999-02-01), Baron
patent: 2240461 (1975-03-01), None
patent: 2167204 (1986-05-01), None
patent: 6-109985 (1994-04-01), None
patent: 7-120686 (1995-05-01), None
English Language Abstract FR2240461.

Affiliated with

Also associated with

Rating

Viewing device 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 device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Viewing device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3502488