The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 2001
Filed:
Dec. 01, 1999
Yasuo Yonezawa, Zushi, JP;
Kenji Ono, Kawasaki, JP;
Jiro Mizuno, Yokohama, JP;
Atsushi Takeuchi, Yokohama, JP;
Nikon Corporation, Tokyo, JP;
Abstract
Illumination light emanated from a laser illumination light source is reflected by a semi-transparent mirror arranged between first and second objective lenses, and illuminates an object through the first objective lens. Reflected light from the object is incident to the photoelectric conversion device through the first objective lens, the semi-transparent mirror, and the second objective lens, and forms an image of the object. The image is captured by a image-taking plane of the photoelectric conversion device tilted relative to the image plane. The second objective lens is telecentric at the image side. The image-taking plane of the photoelectric conversion device is tilted relative to the image plane. Therefore, almost all diffracted light rays from on-axis and off-axis portion of the image-taking plane among all incident light to the image-taking plane are reflected not to enter the second objective lens.