Wide-angle objective for endoscopes

Details Wide-angle objective for endoscopes Wide-angle objective for endoscopes

1988-04-11

1989-08-15

Ng, Jin F.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358225, 350480, 350414, A61D 104

Patent

active

048580023

ABSTRACT:
A wide-angle objective for endoscopes, in particular for video endoscopes comprises fibre image conductors or CCD image transducers, in which known instruments are taken as a basis, in which a distally positioned objective comprises a meniscus lens with its concave surface facing towards the object, as well as another optical component located on the image side. To secure an uncomplicated structure, adequate image quality, a wide object field angle and short structural length, the image-side optical component is also produced as a meniscus lens.

REFERENCES:
patent: 3166623 (1965-01-01), Waidelich, Jr.
patent: 4720178 (1988-01-01), Nishioka et al.
patent: 4746975 (1986-12-01), Ogiu

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