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:
Nov. 18, 1997
Filed:
Jan. 18, 1996
Terumo Kabushiki Kaisha, Tokyo, JP;
Abstract
A depth sampling three-dimensional image display apparatus is capable of displaying a three-dimensional image without use of glasses. The apparatus includes a collimated light projecting device for projecting collimated light and an object of observation which passes substantially all components of the collimated light without inducing refraction or diffraction, and which has written therein information without inducing refraction or diffraction of the collimated light representative of a three-dimensional image. The apparatus further includes a large-diameter convex condenser for concentrating the light passed through the object of observation, a spatial filter which obstructs passage of light only in an area including the optical axis and the vicinity thereof to eliminate the straight-flow component of the light introduced via the large-diameter convex condenser, and a large-diameter convex imaging lens for focusing the light passed through the spatial filter to form a three-dimensional image.