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:
Jun. 19, 2018
Filed:
Dec. 20, 2016
Kopin Corporation, Westborough, MA (US);
Yoichi Iba, Hachioji, JP;
Hideki Tomine, Machida, JP;
KOPIN CORPORATION, Westborough, MA (US);
Abstract
An attachable image display device includes a light guiding prism that guides image light from a display element, and an eyepiece that emits the image light guided by the light guiding prism, wherein the light guiding prism includes an outer peripheral surface, and a reflection surface off which the image light is reflected to the eyepiece; and a portion of or the entirety of an intersection line of the outer peripheral surface and a plane including an optical axis of the image light before the image light is reflected off the reflection surface has a negative inclination angle to the optical axis in a direction downstream of the light path, and a tangential inclination angle of the portion of or the entirety of the intersection line becomes gradually larger from an upstream side to a downstream side of the light path.