Endoscope relay optics

Details Endoscope relay optics Endoscope relay optics

1988-10-21

1991-02-19

Henry, Jon W.

350573, 350464, 350463, 350432, 350470, G02B 2300, G02B 936, G02B 960, G02B 962

Patent

active

049938177

ABSTRACT:
An endoscope relay optics design that reduces the number of air surfaces while maintaining high levels of correction. A lens assembly for incorporation into an optical transfer system (where two such assemblies define an optical transfer module for transferring an image between successive image planes) is of unitary construction. The assembly comprises five elements including a central rod-like element of high index material, a pair of negative elements of relatively low index, high dispersion material cemented to opposite ends of the central element, and a pair of positive end elements of high index, low dispersion material cemented to the negative elements. The powers of the elements are determined by requiring the Petzval sum to assume a desired low value, with index difference being the primary contributor to the correction. The two exposed surfaces are flat or mildly concave and include an aspheric component to correct spherical aberration.

REFERENCES:
patent: 2346062 (1944-04-01), Altman
patent: 2519760 (1950-08-01), Hett
patent: 2571308 (1951-10-01), Taylor
patent: 2899862 (1959-08-01), Baker
patent: 4025155 (1977-05-01), Imai
patent: 4168882 (1979-09-01), Hopkins
patent: 4354730 (1982-10-01), Bel
patent: 4385810 (1983-05-01), Hamou
patent: 4545652 (1985-10-01), Hoogland
patent: 4575195 (1986-03-01), Hoogland
patent: 4783154 (1988-11-01), Takahashi
Proceedings of the OSA; (Hoogland) International Lens Design Conference; SPIE vol. 237; Systematics of photographic Lens types; 1980.

Affiliated with

Also associated with

Rating

Endoscope relay optics does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1138479