OPTICAL COMPONENT

To provide an optical component which is excellent in transmission wavefront accuracy.SOLUTION: An optical component (10) includes: a first substrate (12) having a first major surface (12a) and a second major surface (12b) located on the side opposite to the first major surface; a second substrate (13) having a third major surface (13a) and a fourth major surface (13b) located on the side opposite to the third major surface; and an adhesive (AB) for adhering the second major surface and the third major surface. The optical component is used by passing light from one side of the first major surface and the fourth major surface to the other side. Then, a recessed shape having the recessed amount d is formed on at least one major surface from the first major surface to the fourth major surface.SELECTED DRAWING: Figure 4 【課題】 本発明は、透過波面精度の優れた光学部品を提供する。【解決手段】光学部品（１０）は、第１主面（１２ａ）と該第１主面の反対側である第２主面（１２ｂ）とを有する第１基板（１２）と、第３主面（１３ａ）と該第３主面の反対側である第４主面（１３ｂ）とを有する第２基板（１３）と、第２主面と第３主面とを接着する接着剤（ＡＢ）と、を備える。この光学部品には、第１主面及び第４主面の一方側から他方側に光を通して使用される。そして第１主面から第４主面の少なくとも一主面に凹み量ｄを有する凹み形状が形成される。【選択図】図４