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. 15, 2026
Filed:
Dec. 23, 2024
Fujifilm Corporation, Tokyo, JP;
Yukito Saitoh, Minamiashigara, JP;
Yujiro Yanai, Minamiashigara, JP;
Kazuya Hisanaga, Minamiashigara, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
Provided a spectroscopic system where a reduction in size can be achieved. The spectroscopic system includes an optical element, in which the optical element include a prism and a liquid crystal diffraction element disposed on a first surface of the prism directly or with another layer interposed between the prism and the liquid crystal diffraction element, the prism has a second surface tilted with respect to the first surface, a tilt angle of the second surface is 4° or more, the liquid crystal diffraction element includes a cholesteric liquid crystal layer, the cholesteric liquid crystal layer has a liquid crystal alignment pattern in which an orientation of an optical axis derived from a liquid crystal compound changes while continuously rotating in at least one in-plane direction, in a case where a length over which the orientation of the optical axis in the liquid crystal alignment pattern rotates by 180° is set as a single period, a length of the single period is 0.1 to 1.4 μm, and the spectroscopic system allows dispersion target light to be incident into the liquid crystal diffraction element side, reflects the incident light from the liquid crystal diffraction element, totally reflects the reflected light from a surface of the liquid crystal diffraction element opposite to the prism side, allows the totally reflected light to be incident into the prism, and emits the dispersed light from the second surface.