1981-07-06
1983-08-16
Corbin, John K.
G02B 1708
Patent
active
043988091
ABSTRACT:
This invention provides a high speed catadioptric system of F/1.2. The lens system comprises, in accordance with the advance of the light rays, a front lens, a main mirror lens, a counter mirror surfaced to the central portion of the front lens, and a field lens system. The field lens system is composed of the unsilvered central portion of the main mirror lens and additional lenses immediately adjacent to the main mirror lens at its object- and image side. The same glass is used for the front lens and the main mirror lens. This glass is light, cheap and rather resistant to chemical attack. Three preferred embodiments present a rather high state of correction for the wavelength range from 400 nm to 1000 nm, providing a high contrast image with good detectability of poor-contrast objects. Such lens systems, in spite of their good performance, are of rather simple construction bringing about a lower price of manufacture than known systems. The new lenses are useful also for systems used at low light level employing image intensifier tubes of the 1st, 2nd and 3rd generation.
REFERENCES:
patent: 3711184 (1973-01-01), Amon et al.
patent: 4061420 (1977-12-01), Kaprelian et al.
patent: 4165151 (1979-08-01), Momiyama
patent: 4264136 (1981-04-01), Ogino
Corbin John K.
Kleeman Werner W.
Sugarman Scott J.
LandOfFree
High speed catadioptric 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 High speed catadioptric system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High speed catadioptric system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-811479