Endoscope objective lens and method of assembly
First Claim
1. An objective lens system comprising,an objective lens contained within an objective barrel coupled to a centering assembly having a passageway therethrough that is optically aligned with the objective lens,wherein the centering assembly is coupled to a video chip, the passageway is optically centered over a photosensitive area of the video chip and the centering assembly includes a retainer sleeve, the retainer sleeve including a sidewall that extends at least partially around the video chip and a video chip housing of the video chip, and a centering member having a cylinder coupled thereto, the retainer sleeve having an opening through which the cylinder extends.
1 Assignment
0 Petitions
Accused Products
Abstract
A wide field video endoscope objective and method of assembly the objective including four groups with five lenses, a mechanical housing containing the entire image forming elements, a aperture stop, a centering member and a retainer sleeve. The centering member is at first centered over the photo sensitive area of the chip and bonded to the surface of the cover glass. The retainer sleeve slides over said centering member and is glued to the centering member and the housing of the video chip. The objective housing with the optical elements is screwed on the centering member to adjust for focusing.
2 Citations
18 Claims
-
1. An objective lens system comprising,
an objective lens contained within an objective barrel coupled to a centering assembly having a passageway therethrough that is optically aligned with the objective lens, wherein the centering assembly is coupled to a video chip, the passageway is optically centered over a photosensitive area of the video chip and the centering assembly includes a retainer sleeve, the retainer sleeve including a sidewall that extends at least partially around the video chip and a video chip housing of the video chip, and a centering member having a cylinder coupled thereto, the retainer sleeve having an opening through which the cylinder extends.
-
5. A method for coupling an objective lens to a video chip comprising,
providing a centering member including a base plate, a cylinder coupled substantially perpendicularly to a surface of the base plate and a passageway extending through the cylinder and the base plate, optically aligning the passageway of the centering member over a photosensitive area of the video chip and coupling the centering member to the video chip, providing a retainer sleeve having a sidewall and a partially closed end defining an opening, inserting the cylinder of the base plate through the opening in the retainer sleeve and positioning the sidewall adjacent to a video chip housing, and coupling the retainer sleeve to the video chip housing in a manner that prevents axial movement and radial movement of the retainer sleeve relative to the video chip housing.
-
8. A method for coupling an objective lens to a video chip comprising,
providing a centering member including a base plate, a cylinder coupled substantially perpendicularly to a surface of the base plate and a passageway extending through the cylinder and the base plate, optically aligning the passageway of the centering member over a photosensitive area of the video chip and coupling the centering member to the video chip, providing a retainer sleeve having a sidewall and a partially closed end defining an opening, inserting the cylinder of the base plate through the opening in the retainer sleeve and positioning the sidewall adjacent to a video chip housing, and coupling the retainer sleeve to the video chip housing, wherein the plurality of lenses include, from an object side to an image side successively, a first plano concave lens, a second plano convex lens, a third plano convex lens, and an achromatic lens.
-
13. An objective lens assembly comprising:
-
a centering assembly having a passageway therethrough, and an objective barrel containing a plurality of lenses, wherein the centering assembly is configured for optically aligning the plurality of lenses in the objective barrel with a photo sensitive area that is configured for capturing an image formed by the plurality of lenses, wherein the centering assembly includes a retainer sleeve having a sidewall that is coupled to a video chip housing, and wherein the video chip housing defines an axis that is off-center to an optical axis of the centering assembly. - View Dependent Claims (14, 15, 16, 17, 18)
-
Specification