US Patent 7855844 Objective lens and optical measuring device

Patent 7855844 was granted and assigned to Mitutoyo on December, 2010 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

Mitutoyo

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7855844

Patent Inventor Names

Kenji Okabe0

Date of Patent

December 21, 2010

Patent Application Number

12153135

Date Filed

May 14, 2008

Patent Primary Examiner

‌

Timothy J Thompson

Patent abstract

An objective lens used for a microscope includes a lens(es), an iris diaphragm and a tubular body. The lens(es),which is provided in a manner facing an object, transmits light reflected from a measuring surface of the object. The iris diaphragm, which is provided behind the lens(es), changes an aperture diameter of a light-transmissive aperture of a light-transmissive surface that is substantially orthogonal to a main optical axis of the light transmitted through the lens(es). The tubular body, which is detachably mounted on a revolving nosepiece of a trunk that includes a zoom imaging lens(es) for forming an image from the light transmitted through the light-transmissive aperture, holds the lens(es) and the iris diaphragm.