PROBLEM TO BE SOLVED: To propose a reflection prevention or mirror type optical device improved in performance.SOLUTION: Regarding an optical device (1) suitable for transmitting and reflecting electromagnetic radiation within a wavelength range of an electromagnetic spectrum, the device (1) includes at least a first coating layer (10) made of a first material, a board (50) made of a material different from the first material, and surface texture treatment (60) for forming a cavity (61) in the device (1), a lower layer (50) arranged directly below the first coating layer (10) is either a second coating layer (20) made of a material different from the first material, or the board (50), the lower layer (50) has a prescribed thickness (E50), and the cavity (61) extends through the coating layer (20), and sinks in the lower layer (50) through at least one portion of the thickness (E50).SELECTED DRAWING: Figure 2
- 출원번호 : 2024154005
- 출원인 : H E F;UNIV JEAN MONNET SAINT ETIENNE;MANUTECH USD;CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE;
- 특허번호 :
- IPC : G02B-001/118(2015.01)