US Patent Issued to Hubei Huaxin Photoelectric on July 28 for "4P lens for scanner gun with long depth of field" (Chinese Inventor)

ALEXANDRIA, Va., July 28 -- United States Patent no. 12,693,496, issued on July 28, was assigned to Hubei Huaxin Photoelectric Co. Ltd. (Yichang, China).

"4P lens for scanner gun with long depth of field" was invented by Keyu Chai (Yichang, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A 4P lens for scanner gun with a long depth of field, comprising a first lens, a second lens, an aperture stop, a third lens and a fourth lens along the optical axis from the object side to the image side, the first lens is a negative lens, with a convex surface facing the object side and a concave surface facing the image side, the second lens is a positive lens, with a convex surface facing the object side, and the th...