Inventor

UMEZAWA YASUAKI

JP4 patents

Patents

4 patents

US9158123B2Oct 13, 2015

Light diffraction element and optical low pass filter

ARISAWA SEISAKUSHO KK5 citations67

US12560821B2Feb 24, 2026

Three-dimensional display device and circularly polarized glasses

ARISAWA SEISAKUSHO KK0 citations44

US9760013B2Sep 12, 2017

Exposure apparatus, mask, and optical film

ARISAWA SEISAKUSHO KK0 citations37

US9594276B2Mar 14, 2017

Optical diffraction element, optical pickup, and optical diffraction element manufacturing method

ARISAWA SEISAKUSHO KK0 citations36