Wide-field eyepiece lens system

Details Wide-field eyepiece lens system Wide-field eyepiece lens system

1995-07-21

1996-09-17

Epps, Georgia Y.

Optical: systems and elements

Lens

Eyepiece

359643, G02B 2500

Patent

active

055574645

ABSTRACT:
A wide field eyepiece lens system composed, in order from a side of an objective lens system, of a first lens unit which is composed of a plurality of lens elements and has a diverging function, and a second lens unit which is composed of a plurality of lens elements and has a converging function. The eyepiece lens system has an apparent field angle of 75.degree. to 80.degree., an eye relief of 0.95 f or longer and aberrations favorably corrected over an entire range of a visual field thereof including marginal portions, and is configured so as to satisfy the following conditions (1) and (2):

REFERENCES:
patent: 1478704 (1923-12-01), Erfle
patent: 3352620 (1967-11-01), Scidmore et al.
patent: 3384434 (1968-05-01), Scidmore et al.
patent: 4286844 (1981-09-01), Nagler
patent: 4525035 (1985-06-01), Nagler
patent: 4720183 (1988-01-01), Dilworth

Affiliated with

Also associated with

Rating

Wide-field eyepiece lens system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Wide-field eyepiece lens system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wide-field eyepiece lens system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-417991