HOLOGRAM SHEET, COMBINER, HEAD-UP DISPLAY, MOBILE VEHICLE, AND METHOD OF MANUFACTURING HOLOGRAM SHEET

• Main Authors: MIURA KEISUKE, UCHIYA NAOYUKI
• Format: Patent
• Language: English; Japanese
• Published: 09.08.2023
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PERFORMING OPERATIONS; PHYSICS; TRANSPORTING; VEHICLES IN GENERAL

To make a hologram layer nearly colorless.SOLUTION: A hologram sheet 30 comprises a hologram layer 40. The hologram layer 40 includes a first portion 41 having an interference fringe recorded therein. In the first portion 41, diffraction efficiency for light in a wavelength range of 420-490 nm, inclusive, is lower than diffraction efficiency for light in a wavelength range of 600-780 nm, inclusive, and is lower than diffraction efficiency for light in a wavelength range of 500-570 nm, inclusive.SELECTED DRAWING: Figure 3 【課題】ホログラム層を無色に近づける。【解決手段】ホログラムシート３０は、ホログラム層４０を備える。ホログラム層４０は、干渉縞が記録された第１部分４１を含む。第１部分４１において、波長４２０ｎｍ以上４９０ｎｍ以下の光の回折効率は、波長６００ｎｍ以上７８０ｎｍ以下の光の回折効率より低く、且つ波長５００ｎｍ以上５７０ｎｍ以下の光の回折効率より低い。【選択図】図３