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:
Sep. 20, 1988
Filed:
Jul. 03, 1986
Agency of Industrial Science and Technology, Tokyo, JP;
Abstract
In a dynamic optometer, a variation in the direction of a subject's eye, namely, in the direction of gaze is measured by a direction detector to tilt a bi-axial rocking mirror according to the output of the detector, and an actual image of an eyeball formed by a pair of concave spherical mirrors is reflected to an optical system by the rocking mirror varying the direction of incidence. A second actual image which is formed immediately before a light source by the optical system is stably fixated in one direction, so that the eye is irradiated with light constantly from the front side in spite of eye movements. Accordingly, the refractive power can be measured, unaffected by the movement of an eyeball.