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. 30, 2010
Filed:
Apr. 09, 2009
Thomas A. Balch, Rancho Palos Verdes, CA (US);
John M. Tamkin, San Marino, CA (US);
Nancy L. S. Yamasaki, Long Beach, CA (US);
Jotinderpal S. Sidhu, Irvine, CA (US);
Thomas A. Balch, Rancho Palos Verdes, CA (US);
John M. Tamkin, San Marino, CA (US);
Nancy L. S. Yamasaki, Long Beach, CA (US);
Jotinderpal S. Sidhu, Irvine, CA (US);
Younger Mfg. Co., Torrance, CA (US);
Abstract
The invention relates to an apparatus for comparatively demonstrating the optical properties of eyewear lenses, particularly dispersion. The apparatus includes an illumination source that provides output of shorter wavelength visible light and longer wavelength visible light, a target that creates an image on the light path, a test lens made of eyewear lens material that is illuminated by the light path from the target, and a detector that displays the image acted upon and transmitted through the test lens. The test lens can be interchangeably replaced with another test lens, for comparison of each lens' optical properties. Alternate configurations include multiple light paths, for simultaneous viewing of images through different test lenses.