19000213. SPECTROSCOPIC SYSTEM (FUJIFILM Corporation)
SPECTROSCOPIC SYSTEM
Organization Name
Inventor(s)
Yukito Saitoh of Minamiashigara-shi JP
Yujiro Yanai of Minamiashigara-shi JP
Kazuya Hisanaga of Minamiashigara-shi JP
SPECTROSCOPIC SYSTEM
This abstract first appeared for US patent application 19000213 titled 'SPECTROSCOPIC SYSTEM
Original Abstract Submitted
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.